chore: sync missing root files and folders from KMP project template (#2965)

build-logic/convention/src/main/kotlin/org/mifos/mobile/HierarchyTemplate.kt

@@ -0,0 +1,179 @@
+/**
+ * Kotlin Multiplatform project hierarchy template configuration.
+ *
+ * This file defines a structured hierarchy for organizing source sets in Kotlin Multiplatform
+ * projects. It establishes a logical grouping of platform targets that enables efficient code
+ * sharing across platforms with similar characteristics.
+ *
+ * The hierarchy template creates the following logical groupings:
+ * - `common`: Base shared code for all platforms
+ * - `nonAndroid`: Code shared between JVM, JS, and native platforms, excluding Android
+ * - `jsCommon`: Code shared between JavaScript and WebAssembly JavaScript targets
+ * - `nonJsCommon`: Code shared between JVM and native platforms, excluding JS platforms
+ * - `jvmCommon`: Code shared between Android and JVM targets
+ * - `nonJvmCommon`: Code shared between JS and native platforms, excluding JVM platforms
+ * - `native`: Code shared across all native platforms
+ *   - `apple`: Code shared across Apple platforms (iOS, macOS)
+ *     - `ios`: iOS-specific code
+ *     - `macos`: macOS-specific code
+ * - `nonNative`: Code shared between JS and JVM platforms
+ *
+ * This template applies to both main and test source sets, establishing a consistent
+ * structure throughout the project.
+ *
+ * Note: This implementation uses experimental Kotlin Gradle plugin APIs and may be subject
+ * to change in future Kotlin releases.
+ */
+@file:OptIn(ExperimentalKotlinGradlePluginApi::class)
+
+package org.mifos.mobile
+
+import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
+import org.jetbrains.kotlin.gradle.dsl.KotlinMultiplatformExtension
+import org.jetbrains.kotlin.gradle.plugin.KotlinHierarchyBuilder
+import org.jetbrains.kotlin.gradle.plugin.KotlinHierarchyTemplate
+import org.jetbrains.kotlin.gradle.plugin.KotlinSourceSetTree
+
+/**
+ * Defines the hierarchical structure for source set organization.
+ *
+ * This template establishes the relationships between different platform targets,
+ * creating logical groupings based on platform similarities to facilitate code sharing.
+ */
+private val hierarchyTemplate = KotlinHierarchyTemplate {
+    withSourceSetTree(
+        KotlinSourceSetTree.main,
+        KotlinSourceSetTree.test,
+    )
+
+    common {
+        withCompilations { true }
+
+        groupNonAndroid()
+        groupJsCommon()
+        groupNonJsCommon()
+        groupJvmCommon()
+        groupNonJvmCommon()
+        groupNative()
+        groupNonNative()
+        groupJvmJsCommon()
+        groupMobile()
+    }
+}
+
+/**
+ * Creates a group of non-Android platforms (JVM, JS, and native).
+ */
+private fun KotlinHierarchyBuilder.groupNonAndroid() {
+    group("nonAndroid") {
+        withJvm()
+        groupJsCommon()
+        groupNative()
+    }
+}
+
+/**
+ * Creates a group of JavaScript-related platforms (JS and WebAssembly JS).
+ */
+private fun KotlinHierarchyBuilder.groupJsCommon() {
+    group("jsCommon") {
+        withJs()
+        withWasmJs()
+    }
+}
+
+/**
+ * Creates a group of non-JavaScript platforms (JVM-based and native).
+ */
+private fun KotlinHierarchyBuilder.groupNonJsCommon() {
+    group("nonJsCommon") {
+        groupJvmCommon()
+        groupNative()
+    }
+}
+
+/**
+ * Creates a group of JVM-based platforms (Android and JVM).
+ */
+private fun KotlinHierarchyBuilder.groupJvmCommon() {
+    group("jvmCommon") {
+        withAndroidTarget()
+        withJvm()
+    }
+}
+
+/**
+ * Creates a group of non-JVM platforms (JavaScript and native).
+ */
+private fun KotlinHierarchyBuilder.groupNonJvmCommon() {
+    group("nonJvmCommon") {
+        groupJsCommon()
+        groupNative()
+    }
+}
+
+/**
+ * Creates a group of JVM, JS platforms (JavaScript and JVM).
+ */
+private fun KotlinHierarchyBuilder.groupJvmJsCommon() {
+    group("jvmJsCommon") {
+        groupJsCommon()
+        withJvm()
+    }
+}
+
+/**
+ * Creates a hierarchical group of native platforms with subgroups for Apple platforms.
+ */
+private fun KotlinHierarchyBuilder.groupNative() {
+    group("native") {
+        withNative()
+
+        group("apple") {
+            withApple()
+
+            group("ios") {
+                withIos()
+            }
+
+            group("macos") {
+                withMacos()
+            }
+        }
+    }
+}
+
+/**
+ * Creates a group of non-native platforms (JavaScript and JVM-based).
+ */
+private fun KotlinHierarchyBuilder.groupNonNative() {
+    group("nonNative") {
+        groupJsCommon()
+        groupJvmCommon()
+    }
+}
+
+private fun KotlinHierarchyBuilder.groupMobile() {
+    group("mobile") {
+        withAndroidTarget()
+        withApple()
+    }
+}
+
+/**
+ * Applies the predefined hierarchy template to a Kotlin Multiplatform project.
+ *
+ * This extension function should be called within the `kotlin` block of a Multiplatform
+ * project's build script to establish the source set hierarchy defined in this file.
+ *
+ * Example usage:
+ * ```
+ * kotlin {
+ *     applyProjectHierarchyTemplate()
+ *     // Configure targets...
+ * }
+ * ```
+ */
+fun KotlinMultiplatformExtension.applyProjectHierarchyTemplate() {
+    applyHierarchyTemplate(hierarchyTemplate)
+}

build-logic/convention/src/main/kotlin/org/mifos/mobile/KotlinMultiplatform.kt

@@ -9,7 +9,7 @@ import org.jetbrains.kotlin.gradle.dsl.KotlinMultiplatformExtension
 @OptIn(ExperimentalWasmDsl::class, ExperimentalKotlinGradlePluginApi::class)
 internal fun Project.configureKotlinMultiplatform() {
     extensions.configure<KotlinMultiplatformExtension> {
-        applyDefaultHierarchyTemplate()
+        applyProjectHierarchyTemplate()
 
         jvm("desktop")
         androidTarget()

cmp-android/prodRelease-badging.txt

@@ -1,4 +1,4 @@
-package: name='org.mifospay' versionCode='1' versionName='2024.12.4-beta.0.4' platformBuildVersionName='15' platformBuildVersionCode='35' compileSdkVersion='35' compileSdkVersionCodename='15'
+package: name='org.mifos.mobile' versionCode='1' versionName='2024.12.4-beta.0.4' platformBuildVersionName='15' platformBuildVersionCode='35' compileSdkVersion='35' compileSdkVersionCodename='15'
 sdkVersion:'26'
 targetSdkVersion:'34'
 uses-permission: name='android.permission.INTERNET'
@@ -12,100 +12,100 @@ uses-permission: name='android.permission.WAKE_LOCK'
 uses-permission: name='com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE'
 uses-permission: name='android.permission.ACCESS_ADSERVICES_ATTRIBUTION'
 uses-permission: name='android.permission.ACCESS_ADSERVICES_AD_ID'
-uses-permission: name='org.mifospay.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION'
-application-label:'Mifos Pay'
-application-label-af:'Mifos Pay'
-application-label-am:'Mifos Pay'
-application-label-ar:'Mifos Pay'
-application-label-as:'Mifos Pay'
-application-label-az:'Mifos Pay'
-application-label-be:'Mifos Pay'
-application-label-bg:'Mifos Pay'
-application-label-bn:'Mifos Pay'
-application-label-bs:'Mifos Pay'
-application-label-ca:'Mifos Pay'
-application-label-cs:'Mifos Pay'
-application-label-da:'Mifos Pay'
-application-label-de:'Mifos Pay'
-application-label-el:'Mifos Pay'
-application-label-en-AU:'Mifos Pay'
-application-label-en-CA:'Mifos Pay'
-application-label-en-GB:'Mifos Pay'
-application-label-en-IN:'Mifos Pay'
-application-label-en-XC:'Mifos Pay'
-application-label-es:'Mifos Pay'
-application-label-es-US:'Mifos Pay'
-application-label-et:'Mifos Pay'
-application-label-eu:'Mifos Pay'
-application-label-fa:'Mifos Pay'
-application-label-fi:'Mifos Pay'
-application-label-fr:'Mifos Pay'
-application-label-fr-CA:'Mifos Pay'
-application-label-gl:'Mifos Pay'
-application-label-gu:'Mifos Pay'
-application-label-hi:'Mifos Pay'
-application-label-hr:'Mifos Pay'
-application-label-hu:'Mifos Pay'
-application-label-hy:'Mifos Pay'
-application-label-in:'Mifos Pay'
-application-label-is:'Mifos Pay'
-application-label-it:'Mifos Pay'
-application-label-iw:'Mifos Pay'
-application-label-ja:'Mifos Pay'
-application-label-ka:'Mifos Pay'
-application-label-kk:'Mifos Pay'
-application-label-km:'Mifos Pay'
-application-label-kn:'Mifos Pay'
-application-label-ko:'Mifos Pay'
-application-label-ky:'Mifos Pay'
-application-label-lo:'Mifos Pay'
-application-label-lt:'Mifos Pay'
-application-label-lv:'Mifos Pay'
-application-label-mk:'Mifos Pay'
-application-label-ml:'Mifos Pay'
-application-label-mn:'Mifos Pay'
-application-label-mr:'Mifos Pay'
-application-label-ms:'Mifos Pay'
-application-label-my:'Mifos Pay'
-application-label-nb:'Mifos Pay'
-application-label-ne:'Mifos Pay'
-application-label-nl:'Mifos Pay'
-application-label-or:'Mifos Pay'
-application-label-pa:'Mifos Pay'
-application-label-pl:'Mifos Pay'
-application-label-pt:'Mifos Pay'
-application-label-pt-BR:'Mifos Pay'
-application-label-pt-PT:'Mifos Pay'
-application-label-ro:'Mifos Pay'
-application-label-ru:'Mifos Pay'
-application-label-si:'Mifos Pay'
-application-label-sk:'Mifos Pay'
-application-label-sl:'Mifos Pay'
-application-label-sq:'Mifos Pay'
-application-label-sr:'Mifos Pay'
-application-label-sr-Latn:'Mifos Pay'
-application-label-sv:'Mifos Pay'
-application-label-sw:'Mifos Pay'
-application-label-ta:'Mifos Pay'
-application-label-te:'Mifos Pay'
-application-label-th:'Mifos Pay'
-application-label-tl:'Mifos Pay'
-application-label-tr:'Mifos Pay'
-application-label-uk:'Mifos Pay'
-application-label-ur:'Mifos Pay'
-application-label-uz:'Mifos Pay'
-application-label-vi:'Mifos Pay'
-application-label-zh-CN:'Mifos Pay'
-application-label-zh-HK:'Mifos Pay'
-application-label-zh-TW:'Mifos Pay'
-application-label-zu:'Mifos Pay'
+uses-permission: name='org.mifos.mobile.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION'
+application-label:'Mifos Mobile'
+application-label-af:'Mifos Mobile'
+application-label-am:'Mifos Mobile'
+application-label-ar:'Mifos Mobile'
+application-label-as:'Mifos Mobile'
+application-label-az:'Mifos Mobile'
+application-label-be:'Mifos Mobile'
+application-label-bg:'Mifos Mobile'
+application-label-bn:'Mifos Mobile'
+application-label-bs:'Mifos Mobile'
+application-label-ca:'Mifos Mobile'
+application-label-cs:'Mifos Mobile'
+application-label-da:'Mifos Mobile'
+application-label-de:'Mifos Mobile'
+application-label-el:'Mifos Mobile'
+application-label-en-AU:'Mifos Mobile'
+application-label-en-CA:'Mifos Mobile'
+application-label-en-GB:'Mifos Mobile'
+application-label-en-IN:'Mifos Mobile'
+application-label-en-XC:'Mifos Mobile'
+application-label-es:'Mifos Mobile'
+application-label-es-US:'Mifos Mobile'
+application-label-et:'Mifos Mobile'
+application-label-eu:'Mifos Mobile'
+application-label-fa:'Mifos Mobile'
+application-label-fi:'Mifos Mobile'
+application-label-fr:'Mifos Mobile'
+application-label-fr-CA:'Mifos Mobile'
+application-label-gl:'Mifos Mobile'
+application-label-gu:'Mifos Mobile'
+application-label-hi:'Mifos Mobile'
+application-label-hr:'Mifos Mobile'
+application-label-hu:'Mifos Mobile'
+application-label-hy:'Mifos Mobile'
+application-label-in:'Mifos Mobile'
+application-label-is:'Mifos Mobile'
+application-label-it:'Mifos Mobile'
+application-label-iw:'Mifos Mobile'
+application-label-ja:'Mifos Mobile'
+application-label-ka:'Mifos Mobile'
+application-label-kk:'Mifos Mobile'
+application-label-km:'Mifos Mobile'
+application-label-kn:'Mifos Mobile'
+application-label-ko:'Mifos Mobile'
+application-label-ky:'Mifos Mobile'
+application-label-lo:'Mifos Mobile'
+application-label-lt:'Mifos Mobile'
+application-label-lv:'Mifos Mobile'
+application-label-mk:'Mifos Mobile'
+application-label-ml:'Mifos Mobile'
+application-label-mn:'Mifos Mobile'
+application-label-mr:'Mifos Mobile'
+application-label-ms:'Mifos Mobile'
+application-label-my:'Mifos Mobile'
+application-label-nb:'Mifos Mobile'
+application-label-ne:'Mifos Mobile'
+application-label-nl:'Mifos Mobile'
+application-label-or:'Mifos Mobile'
+application-label-pa:'Mifos Mobile'
+application-label-pl:'Mifos Mobile'
+application-label-pt:'Mifos Mobile'
+application-label-pt-BR:'Mifos Mobile'
+application-label-pt-PT:'Mifos Mobile'
+application-label-ro:'Mifos Mobile'
+application-label-ru:'Mifos Mobile'
+application-label-si:'Mifos Mobile'
+application-label-sk:'Mifos Mobile'
+application-label-sl:'Mifos Mobile'
+application-label-sq:'Mifos Mobile'
+application-label-sr:'Mifos Mobile'
+application-label-sr-Latn:'Mifos Mobile'
+application-label-sv:'Mifos Mobile'
+application-label-sw:'Mifos Mobile'
+application-label-ta:'Mifos Mobile'
+application-label-te:'Mifos Mobile'
+application-label-th:'Mifos Mobile'
+application-label-tl:'Mifos Mobile'
+application-label-tr:'Mifos Mobile'
+application-label-uk:'Mifos Mobile'
+application-label-ur:'Mifos Mobile'
+application-label-uz:'Mifos Mobile'
+application-label-vi:'Mifos Mobile'
+application-label-zh-CN:'Mifos Mobile'
+application-label-zh-HK:'Mifos Mobile'
+application-label-zh-TW:'Mifos Mobile'
+application-label-zu:'Mifos Mobile'
 application-icon-160:'res/mipmap-anydpi-v26/ic_launcher.xml'
 application-icon-240:'res/mipmap-anydpi-v26/ic_launcher.xml'
 application-icon-320:'res/mipmap-anydpi-v26/ic_launcher.xml'
 application-icon-480:'res/mipmap-anydpi-v26/ic_launcher.xml'
 application-icon-640:'res/mipmap-anydpi-v26/ic_launcher.xml'
 application-icon-65534:'res/mipmap-anydpi-v26/ic_launcher.xml'
-application: label='Mifos Pay' icon='res/mipmap-anydpi-v26/ic_launcher.xml'
+application: label='Mifos Mobile' icon='res/mipmap-anydpi-v26/ic_launcher.xml'
 launchable-activity: name='org.mifospay.MainActivity'  label='' icon=''
 property: name='android.adservices.AD_SERVICES_CONFIG' resource='res/xml/ga_ad_services_config.xml' 
 uses-library-not-required:'androidx.window.extensions'

config/detekt/detekt.yml

@@ -451,12 +451,16 @@ naming:
     active: true
     mustBeFirst: true
     excludes:
-      - "**/*.jvm.kt"
-      - "**/*.desktop.kt"
-      - "**/*.wasmJs.kt"
-      - "**/*.native.kt"
-      - "**/*.js.kt"
-      - "**/*.android.kt"
+      [
+        "**/*.android.*",
+        "**/*.desktop.*",
+        "**/*.js.*",
+        "**/*.native.*",
+        "**/*.jvm.*",
+        "**/*.linux.*",
+        "**/*.macos.*",
+        "**/*.wasmJs.*",
+      ]
   MemberNameEqualsClassName:
     active: true
     ignoreOverridden: true
@@ -472,6 +476,10 @@ naming:
   PackageNaming:
     active: true
     packagePattern: '[a-z]+(\.[a-z][A-Za-z0-9]*)*'
+    excludes:
+      [
+        "**/generated/**",
+      ]
   TopLevelPropertyNaming:
     active: true
     constantPattern: "[A-Z][_A-Z0-9]*"

core-base/analytics/.gitignore

@@ -0,0 +1 @@
+/build

core-base/analytics/README.md

@@ -0,0 +1,343 @@
+# :core-base:analytics module
+
+## Overview
+
+The base analytics library provides a comprehensive foundation for tracking user interactions,
+performance metrics, and business events across all platforms in a Kotlin Multiplatform project.
+This module offers type-safe analytics with extensive validation, testing utilities, and performance
+tracking capabilities.
+
+### Enhanced Analytics Events
+
+- **Type-Safe Parameters**: Automatic validation of parameter keys (≤40 chars) and values (≤100
+  chars)
+- **Builder Pattern**: Fluent API for event creation with `withParam()` and `withParams()`
+- **25+ Predefined Event Types**: From navigation to authentication, forms to performance tracking
+- **Comprehensive Parameter Keys**: 40+ standardized parameter keys for consistent tracking
+
+### Powerful Analytics Interface
+
+- **Multiple Convenience Methods**: Simplified logging with `logEvent()` overloads
+- **Built-in Common Events**: `logScreenView()`, `logButtonClick()`, `logError()`,`logFeatureUsed()`
+- **User Management**: Support for `setUserProperty()` and `setUserId()`
+- **Platform Abstraction**: Works seamlessly across Android, iOS, Desktop, and Web
+
+### Advanced Extension Functions
+
+- **Event Builders**: Factory methods for creating common events with validation
+- **Performance Timing**:
+    - `startTiming()` and `timeExecution()` for measuring operation durations
+    - `TimedEvent` class for manual timing control
+- **Batch Processing**: `AnalyticsBatch` for efficient multiple event logging
+- **Safe Parameter Creation**: Robust validation helpers for dynamic data
+
+### Jetpack Compose Integration
+
+- **Declarative Tracking**: `TrackScreenView()` composable for automatic screen analytics
+- **Modifier Extensions**: `Modifier.trackClick()` for effortless interaction tracking
+- **Lifecycle Tracking**: `TrackComposableLifecycle()` for component enter/exit analytics
+- **Helper Functions**: `rememberAnalytics()` for easy composition local access
+
+### Performance Monitoring
+
+- **Operation Timing**: Comprehensive timing utilities with automatic slow operation detection
+- **Memory Tracking**: Real-time memory usage monitoring with automatic warnings
+- **App Lifecycle**: Track app launch times, background/foreground transitions
+- **Performance Statistics**: Percentile-based performance analysis (P95, P99)
+
+### Testing & Validation
+
+- **Test Analytics Helper**: Complete event capture and verification for unit tests
+- **Mock Analytics**: Network delay and failure simulation for robust testing
+- **Data Validation**: Comprehensive validation against analytics platform constraints
+- **Sanitization**: Automatic data cleaning for invalid parameters
+
+### Platform Support
+
+- ✅ **Android**: Full Firebase Analytics integration
+- ✅ **iOS**: Firebase Analytics via `nonJsCommonMain`
+- ✅ **Desktop**: Development-friendly stub implementation
+- ✅ **Web (JS)**: Configurable Firebase/stub implementation
+- ✅ **Native**: Firebase Analytics support
+
+## 📖 Usage Examples
+
+### Basic Event Logging
+
+```kotlin
+// Simple event
+analyticsHelper.logEvent("button_clicked", "button_name" to "save")
+
+// Using convenience methods
+analyticsHelper.logScreenView("UserProfile")
+analyticsHelper.logButtonClick("edit_profile", "UserProfile")
+analyticsHelper.logError("Network error", "NET_001", "UserProfile")
+
+// Builder pattern
+val event = AnalyticsEvent("form_submitted")
+    .withParam("form_name", "user_registration")
+    .withParam("field_count", "8")
+    .withParam("completion_time", "120s")
+analyticsHelper.logEvent(event)
+```
+
+### Performance Tracking
+
+```kotlin
+// Time a suspend function
+val data = analyticsHelper.timePerformance("api_call") {
+    apiService.fetchUserData()
+}
+
+// Manual timing
+val timer = analyticsHelper.startTiming("data_processing")
+processData()
+timer.complete()
+
+// Memory monitoring
+val memoryTracker = analyticsHelper.memoryTracker()
+memoryTracker.logMemoryUsage("after_data_load")
+```
+
+### Compose Integration
+
+```kotlin
+@Composable
+fun UserProfileScreen() {
+    TrackScreenView("UserProfile")
+
+    val analytics = rememberAnalytics()
+
+    Button(
+        modifier = Modifier.trackClick("edit_profile", analytics, "UserProfile"),
+        onClick = { /* edit profile */ }
+    ) {
+        Text("Edit Profile")
+    }
+}
+```
+
+### Batch Processing
+
+```kotlin
+analyticsHelper.batch()
+    .add("user_registered", "user_id" to "12345")
+    .add("email_verified", "verification_method" to "link")
+    .add("profile_completed", "completion_percentage" to "100")
+    .flush()
+```
+
+### Testing
+
+```kotlin
+@Test
+fun testAnalyticsTracking() {
+    val testAnalytics = createTestAnalyticsHelper()
+
+    // Use your component with test analytics
+    userService.registerUser("john@example.com", testAnalytics)
+
+    // Verify analytics were logged
+    testAnalytics.assertEventLogged(
+        "user_registered",
+        mapOf("email_domain" to "example.com")
+    )
+    testAnalytics.assertEventCount("user_registered", 1)
+
+    // Check specific events
+    assert(testAnalytics.hasEvent("email_verification_sent"))
+}
+```
+
+### Data Validation
+
+```kotlin
+// Automatic validation and sanitization
+val validatingAnalytics = analyticsHelper.withValidation(
+    strictMode = false, // Sanitize invalid data instead of throwing
+    logValidationErrors = true
+)
+
+// This will be automatically sanitized if invalid
+validatingAnalytics.logEvent("user-action-with-invalid-chars", "param" to "value")
+
+// Manual validation
+val event = AnalyticsEvent("my_event", listOf(Param("key", "value")))
+val result = event.validate()
+if (!result.isValid) {
+    println("Validation errors: ${result.errors}")
+}
+```
+
+## 🏗️ Architecture
+
+### Core Components
+
+1. **AnalyticsEvent**: Type-safe event representation with builder pattern
+2. **AnalyticsHelper**: Platform-agnostic analytics interface
+3. **Platform Implementations**:
+    - `FirebaseAnalyticsHelper` for production
+    - `StubAnalyticsHelper` for development
+    - `NoOpAnalyticsHelper` for testing
+4. **Extension Functions**: Utility methods for common operations
+5. **Validation Layer**: Data quality assurance
+6. **Testing Utilities**: Comprehensive test support
+
+### Design Principles
+
+- **Type Safety**: Compile-time safety for analytics parameters
+- **Platform Agnostic**: Write once, track everywhere
+- **Performance Conscious**: Minimal overhead with batch processing
+- **Developer Friendly**: Rich testing and debugging tools
+- **Extensible**: Easy to add custom tracking methods
+
+## 🔧 Integration
+
+### Dependencies
+
+```kotlin
+// In your module's build.gradle.kts
+dependencies {
+    implementation(projects.coreBase.analytics)
+
+    // Platform-specific dependencies are handled automatically
+}
+```
+
+### Dependency Injection (Koin)
+
+```kotlin
+val analyticsModule = module {
+    // The actual implementation is provided by platform-specific modules
+    // Android: FirebaseAnalyticsHelper
+    // Desktop: StubAnalyticsHelper
+    // etc.
+}
+```
+
+### Compose Setup
+
+```kotlin
+@Composable
+fun App() {
+    val analytics: AnalyticsHelper = koinInject()
+
+    CompositionLocalProvider(
+        LocalAnalyticsHelper provides analytics
+    ) {
+        // Your app content
+    }
+}
+```
+
+## 📋 Event Types Reference
+
+### Navigation Events
+
+- `SCREEN_VIEW`, `SCREEN_TRANSITION`
+
+### User Interactions
+
+- `BUTTON_CLICK`, `MENU_ITEM_SELECTED`, `SEARCH_PERFORMED`, `FILTER_APPLIED`
+
+### Form Events
+
+- `FORM_STARTED`, `FORM_COMPLETED`, `FORM_ABANDONED`, `FIELD_VALIDATION_ERROR`
+
+### Content Events
+
+- `CONTENT_VIEW`, `CONTENT_SHARED`, `CONTENT_LIKED`
+
+### Error Events
+
+- `ERROR_OCCURRED`, `API_ERROR`, `NETWORK_ERROR`
+
+### Performance Events
+
+- `APP_LAUNCH`, `APP_BACKGROUND`, `APP_FOREGROUND`, `LOADING_TIME`
+
+### Authentication Events
+
+- `LOGIN_ATTEMPT`, `LOGIN_SUCCESS`, `LOGIN_FAILURE`, `LOGOUT`, `SIGNUP_ATTEMPT`, `SIGNUP_SUCCESS`
+
+### Feature Usage
+
+- `FEATURE_USED`, `TUTORIAL_STARTED`, `TUTORIAL_COMPLETED`, `TUTORIAL_SKIPPED`
+
+## 🔒 Privacy & Compliance
+
+- **No PII Logging**: Framework prevents logging of personally identifiable information
+- **Data Validation**: Automatic parameter validation prevents sensitive data leakage
+- **Configurable**: Easy to disable or mock for privacy-compliant testing
+- **Transparent**: All logged data is visible and controllable
+
+## 🚀 Performance Characteristics
+
+- **Minimal Overhead**: Event creation is lightweight with lazy validation
+- **Batch Processing**: Efficient bulk event logging
+- **Memory Conscious**: Automatic memory usage monitoring and warnings
+- **Network Optimized**: Platform implementations handle network efficiency
+
+## 🧪 Testing Features
+
+- **Complete Event Capture**: Test helpers capture all analytics for verification
+- **Assertion Helpers**: Rich assertion methods for common verification patterns
+- **Mock Analytics**: Simulate network conditions and failures
+- **Debug Output**: Pretty-print analytics events for debugging
+
+This module provides the foundation for comprehensive analytics tracking while maintaining code
+quality, performance, and developer experience across all platforms.
+
+## 📚 API Documentation
+
+All classes and methods in this module are comprehensively documented with KDoc. The documentation
+includes:
+
+### Core API Classes
+
+- **[AnalyticsEvent](src/commonMain/kotlin/template/core/base/analytics/AnalyticsEvent.kt)**:
+  Type-safe event representation with builder pattern and validation
+- **[AnalyticsHelper](src/commonMain/kotlin/template/core/base/analytics/AnalyticsHelper.kt)**:
+  Platform-agnostic analytics interface with convenience methods
+- **[Param](src/commonMain/kotlin/template/core/base/analytics/AnalyticsEvent.kt)**: Validated
+  parameter class with automatic constraint checking
+- **[Types](src/commonMain/kotlin/template/core/base/analytics/AnalyticsEvent.kt)**: Standard event
+  type constants organized by category
+- **[ParamKeys](src/commonMain/kotlin/template/core/base/analytics/AnalyticsEvent.kt)**: Standard
+  parameter key constants for consistency
+
+### Extension Functions
+
+- **[AnalyticsExtensions](src/commonMain/kotlin/template/core/base/analytics/AnalyticsExtensions.kt)
+  **: Builder functions, timing utilities, and batch processing
+- **[PerformanceTracker](src/commonMain/kotlin/template/core/base/analytics/PerformanceTracker.kt)
+  **: Advanced performance monitoring and timing utilities
+- **[UiHelpers](src/commonMain/kotlin/template/core/base/analytics/UiHelpers.kt)**: Jetpack Compose
+  integration helpers
+
+### Implementations
+
+- *
+  *[FirebaseAnalyticsHelper](src/nonJsCommonMain/kotlin/template/core/base/analytics/FirebaseAnalyticsHelper.kt)
+  **: Production Firebase Analytics implementation
+- **[StubAnalyticsHelper](src/commonMain/kotlin/template/core/base/analytics/StubAnalyticsHelper.kt)
+  **: Development implementation with console logging
+- **[NoOpAnalyticsHelper](src/commonMain/kotlin/template/core/base/analytics/NoOpAnalyticsHelper.kt)
+  **: No-operation implementation for testing
+
+### Testing & Validation
+
+- **[TestingUtils](src/commonMain/kotlin/template/core/base/analytics/TestingUtils.kt)**:
+  Comprehensive testing utilities and mock implementations
+- **[ValidationUtils](src/commonMain/kotlin/template/core/base/analytics/ValidationUtils.kt)**: Data
+  validation and sanitization utilities
+
+### Documentation Features
+
+- ✅ **Detailed Descriptions**: Every class and method has comprehensive documentation
+- ✅ **Parameter Documentation**: All parameters documented with @param tags
+- ✅ **Usage Examples**: @sample blocks with practical code examples
+- ✅ **Cross-References**: @see tags linking related functionality
+- ✅ **Platform Notes**: Platform-specific behavior and constraints documented
+- ✅ **Error Conditions**: Exception throwing conditions clearly documented
+- ✅ **Since Tags**: Version information for API tracking

core-base/analytics/build.gradle.kts

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+plugins {
+    alias(libs.plugins.mifos.kmp.library)
+    alias(libs.plugins.jetbrainsCompose)
+    alias(libs.plugins.compose.compiler)
+}
+
+android {
+    namespace = "template.core.base.analytics"
+}
+
+kotlin {
+    sourceSets {
+        commonMain.dependencies {
+            implementation(libs.koin.core)
+            implementation(compose.runtime)
+            implementation(compose.ui)
+            implementation(compose.foundation)
+            implementation(libs.kermit.logging)
+            
+            // For timing and performance tracking
+            implementation(libs.kotlinx.datetime)
+        }
+
+        androidMain.dependencies {
+            api(libs.gitlive.firebase.analytics)
+        }
+
+        nonJsCommonMain.dependencies {
+            api(libs.gitlive.firebase.analytics)
+        }
+
+        nativeMain.dependencies {
+            api(libs.gitlive.firebase.analytics)
+        }
+
+        desktopMain.dependencies {
+            api(libs.gitlive.firebase.analytics)
+        }
+
+        mobileMain.dependencies {
+            api(libs.gitlive.firebase.crashlytics)
+        }
+        
+        // Test dependencies for all platforms
+        commonTest.dependencies {
+            implementation(libs.kotlin.test)
+            implementation(libs.kotlinx.coroutines.test)
+        }
+    }
+}

core-base/analytics/src/androidDemo/kotlin/template/core/base/analytics/di/AnalyticsModule.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.analytics.di
+
+import org.koin.core.module.Module
+import org.koin.core.module.dsl.singleOf
+import org.koin.dsl.bind
+import org.koin.dsl.module
+import template.core.base.analytics.AnalyticsHelper
+import template.core.base.analytics.StubAnalyticsHelper
+
+actual val analyticsModule: Module = module {
+    singleOf(::StubAnalyticsHelper) bind AnalyticsHelper::class
+}

core-base/analytics/src/androidMain/AndroidManifest.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    Copyright 2023 Mifos Initiative
+
+    This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+    If a copy of the MPL was not distributed with this file,
+    You can obtain one at https://mozilla.org/MPL/2.0/.
+
+    See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+-->
+<manifest />

core-base/analytics/src/androidProd/kotlin/template.core.base.analytics/di/AnalyticsModule.kt

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+@file:Suppress("InvalidPackageDeclaration")
+
+package template.core.base.analytics.di
+
+import dev.gitlive.firebase.Firebase
+import dev.gitlive.firebase.analytics.FirebaseAnalytics
+import dev.gitlive.firebase.analytics.analytics
+import org.koin.core.module.dsl.singleOf
+import org.koin.dsl.bind
+import org.koin.dsl.module
+import template.core.base.analytics.AnalyticsHelper
+import template.core.base.analytics.FirebaseAnalyticsHelper
+
+actual val analyticsModule = module {
+    single<FirebaseAnalytics> { Firebase.analytics }
+    singleOf(::FirebaseAnalyticsHelper) bind AnalyticsHelper::class
+}

core-base/analytics/src/commonMain/kotlin/template/core/base/analytics/AnalyticsEvent.kt

@@ -0,0 +1,349 @@
+/*
+ * Copyright 2023 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.analytics
+
+/**
+ * Represents an analytics event with type-safe parameter validation.
+ *
+ * This data class encapsulates all information needed to log an analytics event,
+ * including the event type and associated parameters. It provides a builder pattern
+ * through extension methods for convenient event construction.
+ *
+ * @param type The event type identifier. Use predefined constants from [Types] when possible,
+ *             or define custom events that are configured in your analytics backend
+ *             (e.g., Firebase Analytics custom events). Must be non-blank and follow
+ *             analytics platform naming conventions.
+ * @param extras List of key-value parameters that provide additional context for the event.
+ *               Each parameter is validated according to analytics platform constraints
+ *               (key ≤ 40 chars, value ≤ 100 chars). See [Param] for details.
+ *
+ * @see Types for standard event type constants
+ * @see ParamKeys for standard parameter key constants
+ * @see Param for parameter validation rules
+ *
+ * @sample
+ * ```kotlin
+ * // Simple event
+ * val event = AnalyticsEvent(Types.BUTTON_CLICK)
+ *
+ * // Event with parameters using builder pattern
+ * val event = AnalyticsEvent(Types.SCREEN_VIEW)
+ *     .withParam(ParamKeys.SCREEN_NAME, "UserProfile")
+ *     .withParam(ParamKeys.SOURCE_SCREEN, "Dashboard")
+ *
+ * // Event with multiple parameters
+ * val event = AnalyticsEvent(Types.FORM_COMPLETED)
+ *     .withParams(
+ *         ParamKeys.FORM_NAME to "registration",
+ *         ParamKeys.COMPLETION_TIME to "45s",
+ *         "field_count" to "8"
+ *     )
+ * ```
+ *
+ * @since 1.0.0
+ */
+data class AnalyticsEvent(
+    val type: String,
+    val extras: List<Param> = emptyList(),
+) {
+    /**
+     * Adds a single parameter to this analytics event using the builder pattern.
+     *
+     * This method creates a new [AnalyticsEvent] instance with the additional parameter,
+     * following immutable design principles. The parameter will be validated according
+     * to analytics platform constraints.
+     *
+     * @param key The parameter key identifier. Must be non-blank, ≤ 40 characters,
+     *            and follow valid naming conventions (letters, numbers, underscores).
+     *            Use [ParamKeys] constants when possible.
+     * @param value The parameter value. Must be ≤ 100 characters. Can be any string
+     *              representing the parameter data.
+     *
+     * @return A new [AnalyticsEvent] instance with the added parameter
+     * @throws IllegalArgumentException if the parameter violates validation constraints
+     *
+     * @see ParamKeys for standard parameter key constants
+     * @see Param for parameter validation details
+     *
+     * @sample
+     * ```kotlin
+     * val event = AnalyticsEvent(Types.BUTTON_CLICK)
+     *     .withParam(ParamKeys.BUTTON_NAME, "save")
+     *     .withParam(ParamKeys.SCREEN_NAME, "UserProfile")
+     * ```
+     */
+    fun withParam(key: String, value: String): AnalyticsEvent {
+        return copy(extras = extras + Param(key, value))
+    }
+
+    /**
+     * Adds multiple parameters to this analytics event using vararg syntax.
+     *
+     * This method provides a convenient way to add multiple parameters at once
+     * using Kotlin's vararg feature. Each parameter pair will be converted to
+     * a [Param] instance and validated.
+     *
+     * @param params Variable number of parameter pairs (key to value). Each key
+     *               and value must meet the same validation constraints as [withParam].
+     *
+     * @return A new [AnalyticsEvent] instance with all the added parameters
+     * @throws IllegalArgumentException if any parameter violates validation constraints
+     *
+     * @see withParam for single parameter addition
+     * @see ParamKeys for standard parameter key constants
+     *
+     * @sample
+     * ```kotlin
+     * val event = AnalyticsEvent(Types.SEARCH_PERFORMED)
+     *     .withParams(
+     *         ParamKeys.SEARCH_TERM to "kotlin",
+     *         ParamKeys.RESULT_COUNT to "42",
+     *         ParamKeys.SCREEN_NAME to "SearchResults"
+     *     )
+     * ```
+     */
+    fun withParams(vararg params: Pair<String, String>): AnalyticsEvent {
+        val newParams = params.map { Param(it.first, it.second) }
+        return copy(extras = extras + newParams)
+    }
+
+    /**
+     * Adds multiple parameters to this analytics event from a Map.
+     *
+     * This method allows adding parameters from an existing Map<String, String>,
+     * which is useful when working with dynamic parameter sets or converting
+     * from other data structures.
+     *
+     * @param params A map containing parameter key-value pairs. Each entry
+     *               will be converted to a [Param] instance and validated.
+     *
+     * @return A new [AnalyticsEvent] instance with all the added parameters
+     * @throws IllegalArgumentException if any parameter violates validation constraints
+     *
+     * @see withParam for single parameter addition
+     * @see withParams for vararg parameter addition
+     *
+     * @sample
+     * ```kotlin
+     * val dynamicParams = mapOf(
+     *     ParamKeys.USER_TYPE to "premium",
+     *     ParamKeys.APP_VERSION to "2.1.0",
+     *     "custom_metric" to "enabled"
+     * )
+     * val event = AnalyticsEvent(Types.FEATURE_USED)
+     *     .withParams(dynamicParams)
+     * ```
+     */
+    fun withParams(params: Map<String, String>): AnalyticsEvent {
+        val newParams = params.map { Param(it.key, it.value) }
+        return copy(extras = extras + newParams)
+    }
+}
+
+/**
+ * Standard analytics event type constants for consistent cross-platform event logging.
+ *
+ * This object provides predefined event type constants that follow analytics platform
+ * best practices and naming conventions. Using these constants ensures consistency
+ * across your application and compatibility with analytics backends like Firebase Analytics.
+ *
+ * Event types are organized into logical categories:
+ * - **Navigation**: Screen views and navigation tracking
+ * - **User Interactions**: Clicks, selections, and user-initiated actions
+ * - **Forms**: Form lifecycle and validation events
+ * - **Content**: Content engagement and interaction
+ * - **Errors**: Error tracking and debugging
+ * - **Performance**: App performance and timing metrics
+ * - **Authentication**: User authentication and session management
+ * - **Feature Usage**: Feature adoption and usage patterns
+ *
+ * @see ParamKeys for corresponding parameter key constants
+ * @see AnalyticsEvent for usage examples
+ *
+ * @since 1.0.0
+ */
+object Types {
+    // Navigation events
+    const val SCREEN_VIEW = "screen_view"
+    const val SCREEN_TRANSITION = "screen_transition"
+
+    // User interaction events
+    const val BUTTON_CLICK = "button_click"
+    const val MENU_ITEM_SELECTED = "menu_item_selected"
+    const val SEARCH_PERFORMED = "search_performed"
+    const val FILTER_APPLIED = "filter_applied"
+
+    // Form events
+    const val FORM_STARTED = "form_started"
+    const val FORM_COMPLETED = "form_completed"
+    const val FORM_ABANDONED = "form_abandoned"
+    const val FIELD_VALIDATION_ERROR = "field_validation_error"
+
+    // Content events
+    const val CONTENT_VIEW = "content_view"
+    const val CONTENT_SHARED = "content_shared"
+    const val CONTENT_LIKED = "content_liked"
+
+    // Error events
+    const val ERROR_OCCURRED = "error_occurred"
+    const val API_ERROR = "api_error"
+    const val NETWORK_ERROR = "network_error"
+
+    // Performance events
+    const val APP_LAUNCH = "app_launch"
+    const val APP_BACKGROUND = "app_background"
+    const val APP_FOREGROUND = "app_foreground"
+    const val LOADING_TIME = "loading_time"
+
+    // Authentication events
+    const val LOGIN_ATTEMPT = "login_attempt"
+    const val LOGIN_SUCCESS = "login_success"
+    const val LOGIN_FAILURE = "login_failure"
+    const val LOGOUT = "logout"
+    const val SIGNUP_ATTEMPT = "signup_attempt"
+    const val SIGNUP_SUCCESS = "signup_success"
+
+    // Feature usage
+    const val FEATURE_USED = "feature_used"
+    const val TUTORIAL_STARTED = "tutorial_started"
+    const val TUTORIAL_COMPLETED = "tutorial_completed"
+    const val TUTORIAL_SKIPPED = "tutorial_skipped"
+}
+
+/**
+ * Represents a validated analytics parameter with automatic constraint checking.
+ *
+ * This data class encapsulates a key-value pair for analytics events with built-in
+ * validation that enforces analytics platform constraints. The validation occurs
+ * during object construction to ensure data integrity.
+ *
+ * **Validation Rules:**
+ * - Key must be non-blank
+ * - Key must be ≤ 40 characters (Firebase Analytics constraint)
+ * - Value must be ≤ 100 characters (Firebase Analytics constraint)
+ * - Key should follow naming conventions (letters, numbers, underscores)
+ *
+ * @param key The parameter identifier. Use [ParamKeys] constants when possible
+ *            for consistency and to avoid typos.
+ * @param value The parameter value as a string. All values are stored as strings
+ *              regardless of their original type.
+ *
+ * @throws IllegalArgumentException if validation constraints are violated
+ *
+ * @see ParamKeys for standard parameter key constants
+ * @see AnalyticsEvent.withParam for usage in event construction
+ * @see createParam for safe parameter creation with validation
+ *
+ * @sample
+ * ```kotlin
+ * // Valid parameter
+ * val param = Param(ParamKeys.SCREEN_NAME, "UserProfile")
+ *
+ * // This would throw IllegalArgumentException (key too long)
+ * // val invalid = Param("this_key_is_way_too_long_and_exceeds_forty_characters", "value")
+ *
+ * // This would throw IllegalArgumentException (value too long)
+ * // val invalid = Param("key", "very long value..." + "x".repeat(100))
+ * ```
+ *
+ * @since 1.0.0
+ */
+data class Param(val key: String, val value: String) {
+    init {
+        require(key.isNotBlank()) { "Parameter key cannot be blank" }
+        require(key.length <= 40) { "Parameter key cannot exceed 40 characters" }
+        require(value.length <= 100) { "Parameter value cannot exceed 100 characters" }
+    }
+}
+
+/**
+ * Standard parameter key constants for consistent analytics event parameters.
+ *
+ * This object provides predefined parameter key constants that ensure consistency
+ * across analytics events and prevent typos in parameter naming. These keys follow
+ * analytics platform best practices and are organized into logical categories for
+ * easy discovery and usage.
+ *
+ * **Parameter Categories:**
+ * - **Screen & Navigation**: Screen names, navigation context, and flow tracking
+ * - **User Interaction**: UI element identification and interaction context
+ * - **Content**: Content identification, categorization, and engagement
+ * - **Search & Filters**: Search terms, filter states, and result information
+ * - **Forms**: Form identification, field tracking, and completion metrics
+ * - **Performance**: Timing, error tracking, and performance metrics
+ * - **User Attributes**: User identification and characteristic data
+ * - **Feature Usage**: Feature identification and usage patterns
+ * - **General**: Common parameters used across multiple event types
+ *
+ * **Usage Guidelines:**
+ * - Always use these constants instead of hardcoded strings
+ * - Keys are designed to be ≤ 40 characters (analytics platform constraint)
+ * - Values should be kept ≤ 100 characters when possible
+ * - Combine with [Types] constants for consistent event structure
+ *
+ * @see Types for corresponding event type constants
+ * @see Param for parameter validation rules
+ * @see AnalyticsEvent for usage examples
+ *
+ * @since 1.0.0
+ */
+object ParamKeys {
+    // Screen and navigation
+    const val SCREEN_NAME = "screen_name"
+    const val SOURCE_SCREEN = "source_screen"
+    const val DESTINATION_SCREEN = "destination_screen"
+
+    // User interaction
+    const val BUTTON_NAME = "button_name"
+    const val ELEMENT_ID = "element_id"
+    const val ELEMENT_TYPE = "element_type"
+    const val ACTION_TYPE = "action_type"
+
+    // Content
+    const val CONTENT_TYPE = "content_type"
+    const val CONTENT_ID = "content_id"
+    const val CONTENT_NAME = "content_name"
+    const val CATEGORY = "category"
+
+    // Search and filters
+    const val SEARCH_TERM = "search_term"
+    const val FILTER_TYPE = "filter_type"
+    const val FILTER_VALUE = "filter_value"
+    const val RESULT_COUNT = "result_count"
+
+    // Forms
+    const val FORM_NAME = "form_name"
+    const val FIELD_NAME = "field_name"
+    const val ERROR_MESSAGE = "error_message"
+    const val COMPLETION_TIME = "completion_time"
+
+    // Performance
+    const val LOADING_TIME_MS = "loading_time_ms"
+    const val ERROR_CODE = "error_code"
+    const val API_ENDPOINT = "api_endpoint"
+    const val NETWORK_TYPE = "network_type"
+
+    // User attributes
+    const val USER_ID = "user_id"
+    const val USER_TYPE = "user_type"
+    const val DEVICE_TYPE = "device_type"
+    const val APP_VERSION = "app_version"
+
+    // Feature usage
+    const val FEATURE_NAME = "feature_name"
+    const val USAGE_COUNT = "usage_count"
+    const val TUTORIAL_STEP = "tutorial_step"
+
+    // Custom
+    const val VALUE = "value"
+    const val TIMESTAMP = "timestamp"
+    const val DURATION = "duration"
+    const val SUCCESS = "success"
+}

core-base/analytics/src/commonMain/kotlin/template/core/base/analytics/AnalyticsExtensions.kt

@@ -0,0 +1,215 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.analytics
+
+import kotlin.time.Clock
+import kotlin.time.Duration
+import kotlin.time.DurationUnit
+
+/**
+ * Extension functions for enhanced analytics functionality
+ */
+
+/**
+ * Create a screen view event with builder pattern
+ */
+fun AnalyticsEvent.screenView(
+    screenName: String,
+    sourceScreen: String? = null,
+    additionalParams: Map<String, String> = emptyMap(),
+): AnalyticsEvent {
+    val params = mutableListOf(Param(ParamKeys.SCREEN_NAME, screenName))
+    sourceScreen?.let { params.add(Param(ParamKeys.SOURCE_SCREEN, it)) }
+    additionalParams.forEach { (key, value) -> params.add(Param(key, value)) }
+    return AnalyticsEvent(Types.SCREEN_VIEW, params)
+}
+
+/**
+ * Create a button click event with builder pattern
+ */
+fun AnalyticsEvent.buttonClick(
+    buttonName: String,
+    screenName: String? = null,
+    elementId: String? = null,
+): AnalyticsEvent {
+    val params = mutableListOf(Param(ParamKeys.BUTTON_NAME, buttonName))
+    screenName?.let { params.add(Param(ParamKeys.SCREEN_NAME, it)) }
+    elementId?.let { params.add(Param(ParamKeys.ELEMENT_ID, it)) }
+    return AnalyticsEvent(Types.BUTTON_CLICK, params)
+}
+
+/**
+ * Create an error event with builder pattern
+ */
+fun AnalyticsEvent.error(
+    message: String,
+    errorCode: String? = null,
+    screen: String? = null,
+    apiEndpoint: String? = null,
+): AnalyticsEvent {
+    val params = mutableListOf(Param(ParamKeys.ERROR_MESSAGE, message))
+    errorCode?.let { params.add(Param(ParamKeys.ERROR_CODE, it)) }
+    screen?.let { params.add(Param(ParamKeys.SCREEN_NAME, it)) }
+    apiEndpoint?.let { params.add(Param(ParamKeys.API_ENDPOINT, it)) }
+    return AnalyticsEvent(Types.ERROR_OCCURRED, params)
+}
+
+/**
+ * Create a search event with builder pattern
+ */
+fun AnalyticsEvent.search(
+    searchTerm: String,
+    resultCount: Int? = null,
+    screen: String? = null,
+): AnalyticsEvent {
+    val params = mutableListOf(Param(ParamKeys.SEARCH_TERM, searchTerm))
+    resultCount?.let { params.add(Param(ParamKeys.RESULT_COUNT, it.toString())) }
+    screen?.let { params.add(Param(ParamKeys.SCREEN_NAME, it)) }
+    return AnalyticsEvent(Types.SEARCH_PERFORMED, params)
+}
+
+/**
+ * Create a form event with builder pattern
+ */
+fun AnalyticsEvent.formEvent(
+    // FORM_STARTED, FORM_COMPLETED, FORM_ABANDONED
+    eventType: String,
+    formName: String,
+    completionTime: Duration? = null,
+    fieldName: String? = null,
+): AnalyticsEvent {
+    val params = mutableListOf(Param(ParamKeys.FORM_NAME, formName))
+    completionTime?.let { params.add(Param(ParamKeys.COMPLETION_TIME, "${it.toDouble(DurationUnit.SECONDS)}s")) }
+    fieldName?.let { params.add(Param(ParamKeys.FIELD_NAME, it)) }
+    return AnalyticsEvent(eventType, params)
+}
+
+/**
+ * Create a loading time event
+ */
+fun AnalyticsEvent.loadingTime(
+    screen: String,
+    loadingTimeMs: Long,
+    success: Boolean = true,
+): AnalyticsEvent {
+    val params = listOf(
+        Param(ParamKeys.SCREEN_NAME, screen),
+        Param(ParamKeys.LOADING_TIME_MS, loadingTimeMs.toString()),
+        Param(ParamKeys.SUCCESS, success.toString()),
+    )
+    return AnalyticsEvent(Types.LOADING_TIME, params)
+}
+
+/**
+ * Extension functions for AnalyticsHelper to add timing functionality
+ */
+class TimedEvent internal constructor(
+    private val analytics: AnalyticsHelper,
+    private val eventType: String,
+    private val baseParams: List<Param>,
+) {
+    private val startTime = Clock.System.now().toEpochMilliseconds()
+
+    fun complete(additionalParams: Map<String, String> = emptyMap()) {
+        val duration = Clock.System.now().toEpochMilliseconds() - startTime
+        val params = baseParams +
+            Param(ParamKeys.DURATION, duration.toString()) +
+            additionalParams.map { Param(it.key, it.value) }
+        analytics.logEvent(AnalyticsEvent(eventType, params))
+    }
+}
+
+/**
+ * Start timing an event - call complete() when done
+ */
+fun AnalyticsHelper.startTiming(eventType: String, vararg params: Pair<String, String>): TimedEvent {
+    val baseParams = params.map { Param(it.first, it.second) }
+    return TimedEvent(this, eventType, baseParams)
+}
+
+/**
+ * Time a block of code execution
+ */
+inline fun <T> AnalyticsHelper.timeExecution(
+    eventType: String,
+    vararg params: Pair<String, String>,
+    block: () -> T,
+): T {
+    val startTime = Clock.System.now().toEpochMilliseconds()
+    return try {
+        val result = block()
+        val duration = Clock.System.now().toEpochMilliseconds() - startTime
+        logEvent(
+            eventType,
+            *params,
+            ParamKeys.DURATION to duration.toString(),
+            ParamKeys.SUCCESS to "true",
+        )
+        result
+    } catch (e: Exception) {
+        val duration = Clock.System.now().toEpochMilliseconds() - startTime
+        logEvent(
+            eventType,
+            *params,
+            ParamKeys.DURATION to duration.toString(),
+            ParamKeys.SUCCESS to "false",
+            ParamKeys.ERROR_MESSAGE to (e.message ?: "Unknown error"),
+        )
+        throw e
+    }
+}
+
+/**
+ * Batch analytics events for better performance
+ */
+class AnalyticsBatch internal constructor(private val analytics: AnalyticsHelper) {
+    private val events = mutableListOf<AnalyticsEvent>()
+
+    fun add(event: AnalyticsEvent): AnalyticsBatch {
+        events.add(event)
+        return this
+    }
+
+    fun add(type: String, vararg params: Pair<String, String>): AnalyticsBatch {
+        events.add(AnalyticsEvent(type, params.map { Param(it.first, it.second) }))
+        return this
+    }
+
+    fun flush() {
+        events.forEach { analytics.logEvent(it) }
+        events.clear()
+    }
+}
+
+/**
+ * Create a batch for logging multiple events efficiently
+ */
+fun AnalyticsHelper.batch(): AnalyticsBatch = AnalyticsBatch(this)
+
+/**
+ * Safe parameter creation that handles validation
+ */
+@Suppress("ReturnCount")
+fun createParam(key: String, value: Any?): Param? {
+    return try {
+        val stringValue = value?.toString() ?: return null
+        if (key.isBlank() || stringValue.isBlank()) return null
+        Param(key.take(40), stringValue.take(100))
+    } catch (e: Exception) {
+        null // Return null for invalid parameters
+    }
+}
+
+/**
+ * Create parameters from a map, filtering out invalid ones
+ */
+fun createParams(params: Map<String, Any?>): List<Param> {
+    return params.mapNotNull { (key, value) -> createParam(key, value) }
+}

core-base/analytics/src/commonMain/kotlin/template/core/base/analytics/AnalyticsHelper.kt

@@ -0,0 +1,357 @@
+/*
+ * Copyright 2023 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.analytics
+
+/**
+ * Platform-agnostic interface for logging analytics events with comprehensive utility methods.
+ *
+ * This interface provides the core contract for analytics tracking across all platforms
+ * in a Kotlin Multiplatform project. It abstracts the underlying analytics implementation
+ * (Firebase Analytics, custom backends, etc.) and provides convenient methods for common
+ * analytics operations.
+ *
+ * **Key Features:**
+ * - **Type-Safe Event Logging**: Uses [AnalyticsEvent] for validated event structure
+ * - **Convenience Methods**: Simplified APIs for common events (screen views, button clicks, errors)
+ * - **User Management**: Support for user properties and user ID tracking
+ * - **Platform Abstraction**: Works seamlessly across Android, iOS, Desktop, and Web
+ * - **Flexible Parameter Handling**: Multiple ways to add event parameters
+ *
+ * **Available Implementations:**
+ * - [FirebaseAnalyticsHelper]: Production implementation using Firebase Analytics
+ * - [StubAnalyticsHelper]: Development implementation that logs to console
+ * - [NoOpAnalyticsHelper]: No-operation implementation for testing/previews
+ * - [TestAnalyticsHelper]: Test implementation that captures events for verification
+ *
+ * **Usage Patterns:**
+ * ```kotlin
+ * // Dependency injection (Koin)
+ * val analytics: AnalyticsHelper = koinInject()
+ *
+ * // Simple event logging
+ * analytics.logEvent(Types.BUTTON_CLICK, ParamKeys.BUTTON_NAME to "save")
+ *
+ * // Complex event with builder pattern
+ * val event = AnalyticsEvent(Types.FORM_COMPLETED)
+ *     .withParam(ParamKeys.FORM_NAME, "registration")
+ *     .withParam(ParamKeys.COMPLETION_TIME, "45s")
+ * analytics.logEvent(event)
+ *
+ * // Convenience methods
+ * analytics.logScreenView("UserProfile", sourceScreen = "Dashboard")
+ * analytics.logButtonClick("edit_profile", screenName = "UserProfile")
+ * analytics.logError("Network timeout", "NET_001", "UserProfile")
+ * ```
+ *
+ * @see AnalyticsEvent for event structure and validation
+ * @see Types for standard event type constants
+ * @see ParamKeys for standard parameter key constants
+ * @see FirebaseAnalyticsHelper for production implementation
+ * @see StubAnalyticsHelper for development implementation
+ * @see TestAnalyticsHelper for testing implementation
+ *
+ * @since 1.0.0
+ */
+interface AnalyticsHelper {
+    /**
+     * Logs an analytics event to the underlying analytics platform.
+     *
+     * This is the core method that all other logging methods ultimately call.
+     * The event will be validated and sent to the configured analytics backend
+     * (e.g., Firebase Analytics, custom analytics service).
+     *
+     * @param event The [AnalyticsEvent] to log. Must have a valid event type and
+     *              parameters that meet platform constraints.
+     *
+     * @see AnalyticsEvent for event construction and validation
+     * @see Types for standard event types
+     * @see ParamKeys for standard parameter keys
+     *
+     * @since 1.0.0
+     */
+    fun logEvent(event: AnalyticsEvent)
+
+    /**
+     * Logs a simple analytics event with type and optional parameters using vararg syntax.
+     *
+     * This convenience method provides a more concise way to log events without
+     * explicitly creating an [AnalyticsEvent] instance. The parameters will be
+     * automatically converted to [Param] instances and validated.
+     *
+     * @param type The event type identifier. Use constants from [Types] when possible.
+     * @param params Variable number of parameter pairs (key to value). Each parameter
+     *               must meet the same validation constraints as [Param].
+     *
+     * @throws IllegalArgumentException if the event type or any parameter violates
+     *                                  validation constraints
+     *
+     * @see Types for standard event type constants
+     * @see ParamKeys for standard parameter key constants
+     *
+     * @sample
+     * ```kotlin
+     * analytics.logEvent(Types.BUTTON_CLICK,
+     *     ParamKeys.BUTTON_NAME to "save",
+     *     ParamKeys.SCREEN_NAME to "UserProfile"
+     * )
+     * ```
+     *
+     * @since 1.0.0
+     */
+    fun logEvent(type: String, vararg params: Pair<String, String>) {
+        val event = AnalyticsEvent(type, params.map { Param(it.first, it.second) })
+        logEvent(event)
+    }
+
+    /**
+     * Logs a simple analytics event with type and parameters from a Map.
+     *
+     * This convenience method allows logging events with parameters from an existing
+     * Map<String, String>, which is useful when working with dynamic parameter sets
+     * or converting from other data structures.
+     *
+     * @param type The event type identifier. Use constants from [Types] when possible.
+     * @param params A map containing parameter key-value pairs. Each entry will be
+     *               converted to a [Param] instance and validated.
+     *
+     * @throws IllegalArgumentException if the event type or any parameter violates
+     *                                  validation constraints
+     *
+     * @see Types for standard event type constants
+     * @see ParamKeys for standard parameter key constants
+     *
+     * @sample
+     * ```kotlin
+     * val eventParams = mapOf(
+     *     ParamKeys.SEARCH_TERM to "kotlin",
+     *     ParamKeys.RESULT_COUNT to "42"
+     * )
+     * analytics.logEvent(Types.SEARCH_PERFORMED, eventParams)
+     * ```
+     *
+     * @since 1.0.0
+     */
+    fun logEvent(type: String, params: Map<String, String>) {
+        val event = AnalyticsEvent(type, params.map { Param(it.key, it.value) })
+        logEvent(event)
+    }
+
+    /**
+     * Logs a screen view event for navigation tracking.
+     *
+     * This convenience method automatically creates a properly formatted screen view
+     * event, which is essential for understanding user navigation patterns and
+     * screen engagement metrics.
+     *
+     * @param screenName The name/identifier of the screen being viewed. Should be
+     *                   descriptive and consistent across the app (e.g., "UserProfile",
+     *                   "Settings", "ProductDetails").
+     * @param sourceScreen Optional name of the previous screen that led to this view.
+     *                     Useful for understanding navigation flows and user journeys.
+     *
+     * @see Types.SCREEN_VIEW for the generated event type
+     * @see ParamKeys.SCREEN_NAME for the screen name parameter
+     * @see ParamKeys.SOURCE_SCREEN for the source screen parameter
+     *
+     * @sample
+     * ```kotlin
+     * // Simple screen view
+     * analytics.logScreenView("UserProfile")
+     *
+     * // Screen view with navigation context
+     * analytics.logScreenView("ProductDetails", sourceScreen = "ProductList")
+     * ```
+     *
+     * @since 1.0.0
+     */
+    fun logScreenView(screenName: String, sourceScreen: String? = null) {
+        val params = mutableListOf(Param(ParamKeys.SCREEN_NAME, screenName))
+        sourceScreen?.let { params.add(Param(ParamKeys.SOURCE_SCREEN, it)) }
+        logEvent(AnalyticsEvent(Types.SCREEN_VIEW, params))
+    }
+
+    /**
+     * Logs a button click event for user interaction tracking.
+     *
+     * This convenience method tracks user interactions with buttons and other
+     * clickable elements, helping understand feature usage and user engagement
+     * patterns.
+     *
+     * @param buttonName The identifier or label of the button clicked. Should be
+     *                   descriptive and consistent (e.g., "save", "edit_profile",
+     *                   "submit_form").
+     * @param screenName Optional name of the screen where the button was clicked.
+     *                   Provides context for understanding interaction patterns.
+     *
+     * @see Types.BUTTON_CLICK for the generated event type
+     * @see ParamKeys.BUTTON_NAME for the button name parameter
+     * @see ParamKeys.SCREEN_NAME for the screen name parameter
+     *
+     * @sample
+     * ```kotlin
+     * // Simple button click
+     * analytics.logButtonClick("save")
+     *
+     * // Button click with screen context
+     * analytics.logButtonClick("edit_profile", screenName = "UserProfile")
+     * ```
+     *
+     * @since 1.0.0
+     */
+    fun logButtonClick(buttonName: String, screenName: String? = null) {
+        val params = mutableListOf(Param(ParamKeys.BUTTON_NAME, buttonName))
+        screenName?.let { params.add(Param(ParamKeys.SCREEN_NAME, it)) }
+        logEvent(AnalyticsEvent(Types.BUTTON_CLICK, params))
+    }
+
+    /**
+     * Logs an error event for debugging and monitoring.
+     *
+     * This convenience method tracks errors and exceptions that occur in the
+     * application, providing valuable information for debugging, monitoring
+     * app stability, and improving user experience.
+     *
+     * @param errorMessage A descriptive message about the error. Should be clear
+     *                     and actionable for debugging purposes.
+     * @param errorCode Optional error code or identifier that can help categorize
+     *                  and track specific types of errors (e.g., "NET_001", "DB_ERROR").
+     * @param screen Optional name of the screen where the error occurred. Helps
+     *               identify problematic areas of the app.
+     *
+     * @see Types.ERROR_OCCURRED for the generated event type
+     * @see ParamKeys.ERROR_MESSAGE for the error message parameter
+     * @see ParamKeys.ERROR_CODE for the error code parameter
+     * @see ParamKeys.SCREEN_NAME for the screen name parameter
+     *
+     * @sample
+     * ```kotlin
+     * // Simple error logging
+     * analytics.logError("Network connection failed")
+     *
+     * // Error with code and context
+     * analytics.logError(
+     *     errorMessage = "API request timeout",
+     *     errorCode = "NET_001",
+     *     screen = "UserProfile"
+     * )
+     * ```
+     *
+     * @since 1.0.0
+     */
+    fun logError(errorMessage: String, errorCode: String? = null, screen: String? = null) {
+        val params = mutableListOf(Param(ParamKeys.ERROR_MESSAGE, errorMessage))
+        errorCode?.let { params.add(Param(ParamKeys.ERROR_CODE, it)) }
+        screen?.let { params.add(Param(ParamKeys.SCREEN_NAME, it)) }
+        logEvent(AnalyticsEvent(Types.ERROR_OCCURRED, params))
+    }
+
+    /**
+     * Logs a feature usage event for feature adoption tracking.
+     *
+     * This convenience method tracks when users interact with specific features
+     * or functionality, helping understand feature adoption, usage patterns,
+     * and user engagement with different parts of the application.
+     *
+     * @param featureName The identifier of the feature being used. Should be
+     *                    descriptive and consistent (e.g., "dark_mode", "export_data",
+     *                    "voice_input").
+     * @param screen Optional name of the screen where the feature was used.
+     *               Provides context for understanding feature usage patterns.
+     *
+     * @see Types.FEATURE_USED for the generated event type
+     * @see ParamKeys.FEATURE_NAME for the feature name parameter
+     * @see ParamKeys.SCREEN_NAME for the screen name parameter
+     *
+     * @sample
+     * ```kotlin
+     * // Simple feature usage
+     * analytics.logFeatureUsed("dark_mode")
+     *
+     * // Feature usage with screen context
+     * analytics.logFeatureUsed("export_data", screen = "Settings")
+     * ```
+     *
+     * @since 1.0.0
+     */
+    fun logFeatureUsed(featureName: String, screen: String? = null) {
+        val params = mutableListOf(Param(ParamKeys.FEATURE_NAME, featureName))
+        screen?.let { params.add(Param(ParamKeys.SCREEN_NAME, it)) }
+        logEvent(AnalyticsEvent(Types.FEATURE_USED, params))
+    }
+
+    /**
+     * Sets a user property for analytics user profiling and segmentation.
+     *
+     * User properties allow you to describe segments of your user base, such as
+     * language preference, geographic location, or user type. These properties
+     * are attached to all subsequent events and can be used for analytics
+     * filtering and audience creation.
+     *
+     * **Note:** This is a default implementation that does nothing. Platform-specific
+     * implementations may override this to provide actual functionality.
+     *
+     * @param name The property name identifier. Must be non-blank and ≤ 24 characters
+     *             (Firebase Analytics constraint). Should use consistent naming
+     *             conventions across the app.
+     * @param value The property value. Must be ≤ 36 characters (Firebase Analytics
+     *              constraint). Should be descriptive and useful for segmentation.
+     *
+     * @see setUserId for setting user identification
+     *
+     * @sample
+     * ```kotlin
+     * // Set user characteristics
+     * analytics.setUserProperty("user_type", "premium")
+     * analytics.setUserProperty("preferred_language", "en")
+     * analytics.setUserProperty("app_theme", "dark")
+     * ```
+     *
+     * @since 1.0.0
+     */
+    fun setUserProperty(name: String, value: String) {
+        // Default implementation does nothing - can be overridden by implementations that support it
+    }
+
+    /**
+     * Sets the user ID for analytics user tracking and identification.
+     *
+     * The user ID is a unique identifier for a user that persists across sessions
+     * and devices. It enables you to connect user behavior across multiple sessions
+     * and understand the user journey more comprehensively.
+     *
+     * **Note:** This is a default implementation that does nothing. Platform-specific
+     * implementations may override this to provide actual functionality.
+     *
+     * **Privacy Considerations:**
+     * - Ensure the user ID does not contain personally identifiable information (PII)
+     * - Consider using hashed or obfuscated identifiers
+     * - Follow privacy regulations and platform guidelines
+     *
+     * @param userId The unique identifier for the user. Must be non-blank and
+     *               ≤ 256 characters (Firebase Analytics constraint). Should be
+     *               consistent across sessions and not contain PII.
+     *
+     * @see setUserProperty for setting user characteristics
+     *
+     * @sample
+     * ```kotlin
+     * // Set user ID (use hashed or obfuscated IDs for privacy)
+     * analytics.setUserId("user_${hashedUserId}")
+     *
+     * // Clear user ID on logout
+     * analytics.setUserId("")
+     * ```
+     *
+     * @since 1.0.0
+     */
+    fun setUserId(userId: String) {
+        // Default implementation does nothing - can be overridden by implementations that support it
+    }
+}

core-base/analytics/src/commonMain/kotlin/template/core/base/analytics/NoOpAnalyticsHelper.kt

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2023 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.analytics
+
+/**
+ * No-operation implementation of [AnalyticsHelper] that discards all analytics events.
+ *
+ * This implementation provides a complete no-op analytics solution that can be used
+ * in scenarios where analytics tracking should be disabled or is not desired. It's
+ * particularly useful for:
+ *
+ * - **Testing**: Unit tests where analytics calls should not interfere
+ * - **Previews**: Jetpack Compose previews that need an analytics implementation
+ * - **Debug Builds**: Development builds where analytics tracking is disabled
+ * - **Privacy Mode**: Special app modes where analytics is intentionally disabled
+ * - **Fallback**: Default implementation when no specific analytics provider is configured
+ *
+ * All methods in this implementation are safe to call and will not throw exceptions,
+ * making it a reliable fallback option.
+ *
+ * @see AnalyticsHelper for the complete interface contract
+ * @see StubAnalyticsHelper for a development implementation that logs events
+ * @see TestAnalyticsHelper for a testing implementation that captures events
+ *
+ * @sample
+ * ```kotlin
+ * // Use in tests
+ * val analytics: AnalyticsHelper = NoOpAnalyticsHelper()
+ *
+ * // Use as default in CompositionLocal
+ * val LocalAnalyticsHelper = staticCompositionLocalOf<AnalyticsHelper> {
+ *     NoOpAnalyticsHelper()
+ * }
+ * ```
+ *
+ * @since 1.0.0
+ */
+class NoOpAnalyticsHelper : AnalyticsHelper {
+    /**
+     * Discards the analytics event without any processing.
+     *
+     * @param event The analytics event to discard (ignored)
+     */
+    override fun logEvent(event: AnalyticsEvent) = Unit
+}

core-base/analytics/src/commonMain/kotlin/template/core/base/analytics/PerformanceTracker.kt

@@ -0,0 +1,283 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.analytics
+
+import kotlin.time.Clock
+
+/** Performance tracking utilities for analytics */
+
+/** Performance tracker that automatically logs performance metrics */
+class PerformanceTracker(
+    private val analytics: AnalyticsHelper,
+    private val enableAutomaticLogging: Boolean = true,
+    private val slowThresholdMs: Long = 1000L,
+    private val verySlowThresholdMs: Long = 5000L,
+) {
+
+    private val activeTimers = mutableMapOf<String, Long>()
+    private val performanceMetrics = mutableMapOf<String, MutableList<Long>>()
+
+    /** Start timing an operation */
+    fun startTimer(operationName: String, context: Map<String, String> = emptyMap()): String {
+        val timerId = "${operationName}_$currentTime"
+        activeTimers[timerId] = currentTime
+
+        if (enableAutomaticLogging) {
+            analytics.logEvent(
+                "performance_timer_started",
+                mapOf("operation" to operationName, "timer_id" to timerId) + context,
+            )
+        }
+
+        return timerId
+    }
+
+    /** Stop timing an operation and log the result */
+    fun stopTimer(
+        timerId: String,
+        success: Boolean = true,
+        additionalContext: Map<String, String> = emptyMap(),
+    ): Long? {
+        val startTime = activeTimers.remove(timerId) ?: return null
+        val duration = currentTime - startTime
+
+        // Extract operation name from timer ID
+        val operationName = timerId.substringBeforeLast("_")
+
+        // Store metric for analysis
+        performanceMetrics.getOrPut(operationName) { mutableListOf() }.add(duration)
+
+        if (enableAutomaticLogging) {
+            val performanceLevel = when {
+                duration > verySlowThresholdMs -> "very_slow"
+                duration > slowThresholdMs -> "slow"
+                else -> "normal"
+            }
+
+            analytics.logEvent(
+                "performance_timer_stopped",
+                mapOf(
+                    "operation" to operationName,
+                    "timer_id" to timerId,
+                    ParamKeys.DURATION to "${duration}ms",
+                    ParamKeys.SUCCESS to success.toString(),
+                    "performance_level" to performanceLevel,
+                ) + additionalContext,
+            )
+        }
+
+        return duration
+    }
+
+    /** Time a suspend function execution */
+    suspend inline fun <T> timeOperation(
+        operationName: String,
+        context: Map<String, String> = emptyMap(),
+        crossinline operation: suspend () -> T,
+    ): T {
+        val timerId = startTimer(operationName, context)
+        return try {
+            val result = operation()
+            stopTimer(timerId, success = true)
+            result
+        } catch (e: Exception) {
+            stopTimer(
+                timerId,
+                success = false,
+                mapOf(ParamKeys.ERROR_MESSAGE to (e.message ?: "Unknown error")),
+            )
+            throw e
+        }
+    }
+
+    /** Time a regular function execution */
+    inline fun <T> timeOperationSync(
+        operationName: String,
+        context: Map<String, String> = emptyMap(),
+        operation: () -> T,
+    ): T {
+        val timerId = startTimer(operationName, context)
+        return try {
+            val result = operation()
+            stopTimer(timerId, success = true)
+            result
+        } catch (e: Exception) {
+            stopTimer(
+                timerId,
+                success = false,
+                mapOf(ParamKeys.ERROR_MESSAGE to (e.message ?: "Unknown error")),
+            )
+            throw e
+        }
+    }
+
+    /** Get performance statistics for an operation */
+    @Suppress("ReturnCount")
+    fun getPerformanceStats(operationName: String): PerformanceStats? {
+        val durations = performanceMetrics[operationName] ?: return null
+        if (durations.isEmpty()) return null
+
+        val sorted = durations.sorted()
+        return PerformanceStats(
+            operationName = operationName,
+            count = durations.size,
+            averageMs = durations.average(),
+            medianMs = sorted[sorted.size / 2].toDouble(),
+            p95Ms = sorted[(sorted.size * 0.95).toInt().coerceAtMost(sorted.size - 1)].toDouble(),
+            p99Ms = sorted[(sorted.size * 0.99).toInt().coerceAtMost(sorted.size - 1)].toDouble(),
+            minMs = sorted.first().toDouble(),
+            maxMs = sorted.last().toDouble(),
+        )
+    }
+
+    /** Log performance summary for an operation */
+    fun logPerformanceSummary(operationName: String) {
+        val stats = getPerformanceStats(operationName) ?: return
+
+        analytics.logEvent(
+            "performance_summary",
+            mapOf(
+                "operation" to operationName,
+                "count" to stats.count.toString(),
+                "average_ms" to stats.averageMs.toInt().toString(),
+                "median_ms" to stats.medianMs.toInt().toString(),
+                "p95_ms" to stats.p95Ms.toInt().toString(),
+                "p99_ms" to stats.p99Ms.toInt().toString(),
+                "min_ms" to stats.minMs.toInt().toString(),
+                "max_ms" to stats.maxMs.toInt().toString(),
+            ),
+        )
+    }
+
+    /** Clear performance metrics */
+    fun clearMetrics() {
+        performanceMetrics.clear()
+        activeTimers.clear()
+    }
+
+    /** Get all active timers */
+    fun getActiveTimers(): Map<String, Long> = activeTimers.toMap()
+}
+
+/** Performance statistics for an operation */
+data class PerformanceStats(
+    val operationName: String,
+    val count: Int,
+    val averageMs: Double,
+    val medianMs: Double,
+    val p95Ms: Double,
+    val p99Ms: Double,
+    val minMs: Double,
+    val maxMs: Double,
+)
+
+/** App lifecycle performance tracker */
+class AppLifecycleTracker(private val analytics: AnalyticsHelper) {
+
+    private var appStartTime: Long? = null
+    private var lastForegroundTime: Long? = null
+    private var backgroundTime: Long? = null
+
+    /** Mark app launch start */
+    fun markAppLaunchStart() {
+        appStartTime = currentTime
+        analytics.logEvent(
+            Types.APP_LAUNCH,
+            mapOf("launch_start_time" to appStartTime.toString()),
+        )
+    }
+
+    /** Mark app launch complete */
+    fun markAppLaunchComplete() {
+        val startTime = appStartTime ?: return
+        val launchDuration = currentTime - startTime
+
+        analytics.logEvent(
+            "app_launch_completed",
+            mapOf(
+                "launch_duration_ms" to launchDuration.toString(),
+                "launch_performance" to when {
+                    launchDuration < 1000 -> "fast"
+                    launchDuration < 3000 -> "normal"
+                    else -> "slow"
+                },
+            ),
+        )
+    }
+
+    /** Mark app going to background */
+    fun markAppBackground() {
+        backgroundTime = currentTime
+        val foregroundTime = lastForegroundTime
+
+        analytics.logEvent(
+            Types.APP_BACKGROUND,
+            if (foregroundTime != null) {
+                mapOf("foreground_duration_ms" to (backgroundTime!! - foregroundTime).toString())
+            } else {
+                emptyMap()
+            },
+        )
+    }
+
+    /** Mark app coming to foreground */
+    fun markAppForeground() {
+        val currentTime = currentTime
+        lastForegroundTime = currentTime
+        val bgTime = backgroundTime
+
+        analytics.logEvent(
+            Types.APP_FOREGROUND,
+            if (bgTime != null) {
+                mapOf("background_duration_ms" to (currentTime - bgTime).toString())
+            } else {
+                emptyMap()
+            },
+        )
+    }
+}
+
+/** Extension functions for AnalyticsHelper to add performance tracking */
+
+/** Create a performance tracker */
+fun AnalyticsHelper.performanceTracker(
+    enableAutomaticLogging: Boolean = true,
+    slowThresholdMs: Long = 1000L,
+    verySlowThresholdMs: Long = 5000L,
+): PerformanceTracker =
+    PerformanceTracker(
+        analytics = this,
+        enableAutomaticLogging = enableAutomaticLogging,
+        slowThresholdMs = slowThresholdMs,
+        verySlowThresholdMs = verySlowThresholdMs,
+    )
+
+/** Create an app lifecycle tracker */
+fun AnalyticsHelper.lifecycleTracker(): AppLifecycleTracker = AppLifecycleTracker(this)
+
+private val currentTime = Clock.System.now().toEpochMilliseconds()
+
+/** Quick performance timing for suspend functions */
+suspend inline fun <T> AnalyticsHelper.timePerformance(
+    operationName: String,
+    context: Map<String, String> = emptyMap(),
+    crossinline operation: suspend () -> T,
+): T {
+    return performanceTracker().timeOperation(operationName, context, operation)
+}
+
+/** Quick performance timing for regular functions */
+inline fun <T> AnalyticsHelper.timePerformanceSync(
+    operationName: String,
+    context: Map<String, String> = emptyMap(),
+    operation: () -> T,
+): T {
+    return performanceTracker().timeOperationSync(operationName, context, operation)
+}

core-base/analytics/src/commonMain/kotlin/template/core/base/analytics/StubAnalyticsHelper.kt

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2023 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.analytics
+
+import co.touchlab.kermit.Logger
+
+private const val TAG = "StubAnalyticsHelper"
+
+/**
+ * Development implementation of [AnalyticsHelper] that logs events to console output.
+ *
+ * This implementation provides a lightweight analytics solution for development and
+ * debugging purposes. Instead of sending events to a remote analytics service, it
+ * logs all events to the console using Kermit logging, making it easy to verify
+ * that analytics events are being generated correctly during development.
+ *
+ * **Use Cases:**
+ * - **Development Builds**: Debug app builds where you want to see analytics events
+ * - **Local Testing**: Manual testing where you want to verify event generation
+ * - **Debugging**: Troubleshooting analytics implementation issues
+ * - **Offline Development**: Working without network connectivity to analytics services
+ *
+ * **Output Format:**
+ * Events are logged with the full event structure including type and parameters,
+ * making it easy to verify the correct data is being tracked.
+ *
+ * @see AnalyticsHelper for the complete interface contract
+ * @see NoOpAnalyticsHelper for a no-operation implementation
+ * @see FirebaseAnalyticsHelper for the production implementation
+ * @see TestAnalyticsHelper for a testing implementation with capture capabilities
+ *
+ * @sample
+ * ```kotlin
+ * // Typically used in platform-specific DI modules for debug builds
+ * val analyticsModule = module {
+ *     single<AnalyticsHelper> { StubAnalyticsHelper() }
+ * }
+ * ```
+ *
+ * @since 1.0.0
+ */
+internal class StubAnalyticsHelper : AnalyticsHelper {
+    /**
+     * Logs the analytics event to console output using Kermit logger.
+     *
+     * The event is logged at ERROR level to ensure visibility in most logging
+     * configurations. The log includes the complete event structure with type
+     * and all parameters.
+     *
+     * @param event The analytics event to log to console
+     */
+    override fun logEvent(event: AnalyticsEvent) {
+        Logger.e(TAG, null, "Received analytics event: $event")
+    }
+}

core-base/analytics/src/commonMain/kotlin/template/core/base/analytics/TestingUtils.kt

@@ -0,0 +1,234 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.analytics
+
+/** Testing utilities for analytics functionality */
+
+/**
+ * Test implementation of AnalyticsHelper that captures events for
+ * verification
+ */
+class TestAnalyticsHelper : AnalyticsHelper {
+    private val _loggedEvents = mutableListOf<AnalyticsEvent>()
+    private val _userProperties = mutableMapOf<String, String>()
+    private var _userId: String? = null
+
+    /** Get all logged events */
+    val loggedEvents: List<AnalyticsEvent> get() = _loggedEvents.toList()
+
+    /** Get all set user properties */
+    val userProperties: Map<String, String> get() = _userProperties.toMap()
+
+    /** Get the current user ID */
+    val userId: String? get() = _userId
+
+    override fun logEvent(event: AnalyticsEvent) {
+        _loggedEvents.add(event)
+    }
+
+    override fun setUserProperty(name: String, value: String) {
+        _userProperties[name] = value
+    }
+
+    override fun setUserId(userId: String) {
+        _userId = userId
+    }
+
+    /** Clear all captured data */
+    fun clear() {
+        _loggedEvents.clear()
+        _userProperties.clear()
+        _userId = null
+    }
+
+    /** Get events by type */
+    fun getEventsByType(type: String): List<AnalyticsEvent> {
+        return _loggedEvents.filter { it.type == type }
+    }
+
+    /** Get the last logged event */
+    fun getLastEvent(): AnalyticsEvent? = _loggedEvents.lastOrNull()
+
+    /** Get events containing a specific parameter */
+    fun getEventsWithParam(key: String, value: String? = null): List<AnalyticsEvent> {
+        return _loggedEvents.filter { event ->
+            event.extras.any { param ->
+                param.key == key && (value == null || param.value == value)
+            }
+        }
+    }
+
+    /** Verify that an event was logged */
+    fun hasEvent(type: String, params: Map<String, String> = emptyMap()): Boolean {
+        return _loggedEvents.any { event ->
+            event.type == type && params.all { (key, value) ->
+                event.extras.any { it.key == key && it.value == value }
+            }
+        }
+    }
+
+    /** Get count of events by type */
+    fun getEventCount(type: String): Int {
+        return _loggedEvents.count { it.type == type }
+    }
+
+    /** Get all unique event types logged */
+    fun getUniqueEventTypes(): Set<String> {
+        return _loggedEvents.map { it.type }.toSet()
+    }
+
+    /** Verify screen view was logged */
+    fun hasScreenView(screenName: String): Boolean {
+        return hasEvent(Types.SCREEN_VIEW, mapOf(ParamKeys.SCREEN_NAME to screenName))
+    }
+
+    /** Verify button click was logged */
+    fun hasButtonClick(buttonName: String): Boolean {
+        return hasEvent(Types.BUTTON_CLICK, mapOf(ParamKeys.BUTTON_NAME to buttonName))
+    }
+
+    /** Verify error was logged */
+    fun hasError(errorMessage: String): Boolean {
+        return hasEvent(Types.ERROR_OCCURRED, mapOf(ParamKeys.ERROR_MESSAGE to errorMessage))
+    }
+
+    /** Get all parameters for a specific event type */
+    fun getParametersForEventType(type: String): List<Map<String, String>> {
+        return _loggedEvents.filter { it.type == type }
+            .map { event -> event.extras.associate { it.key to it.value } }
+    }
+
+    /** Print all logged events (useful for debugging) */
+    fun printEvents() {
+        if (_loggedEvents.isEmpty()) {
+            println("No analytics events logged")
+            return
+        }
+
+        println("Analytics Events Logged:")
+        _loggedEvents.forEachIndexed { index, event ->
+            println("${index + 1}. ${event.type}")
+            event.extras.forEach { param ->
+                println("   ${param.key}: ${param.value}")
+            }
+        }
+
+        if (_userProperties.isNotEmpty()) {
+            println("\nUser Properties:")
+            _userProperties.forEach { (key, value) ->
+                println("   $key: $value")
+            }
+        }
+
+        _userId?.let {
+            println("\nUser ID: $it")
+        }
+    }
+}
+
+/** Create a test analytics helper for testing */
+fun createTestAnalyticsHelper(): TestAnalyticsHelper = TestAnalyticsHelper()
+
+/** Extension for asserting events in tests */
+fun TestAnalyticsHelper.assertEventLogged(
+    type: String,
+    params: Map<String, String> = emptyMap(),
+    message: String? = null,
+) {
+    val found = hasEvent(type, params)
+    if (!found) {
+        val errorMessage = message ?: "Expected event '$type' with params $params was not logged"
+        val actualEvents = getEventsByType(type)
+        if (actualEvents.isEmpty()) {
+            throw AssertionError("$errorMessage. No events of type '$type' were logged.")
+        } else {
+            throw AssertionError(
+                "$errorMessage. Events of type '$type' found: ${
+                    actualEvents.map {
+                        it.extras.associate { p -> p.key to p.value }
+                    }
+                }",
+            )
+        }
+    }
+}
+
+/** Extension for asserting event count */
+fun TestAnalyticsHelper.assertEventCount(
+    type: String,
+    expectedCount: Int,
+    message: String? = null,
+) {
+    val actualCount = getEventCount(type)
+    if (actualCount != expectedCount) {
+        val errorMessage =
+            message ?: "Expected $expectedCount events of type '$type', but found $actualCount"
+        throw AssertionError(errorMessage)
+    }
+}
+
+/** Extension for asserting user property was set */
+fun TestAnalyticsHelper.assertUserProperty(
+    name: String,
+    expectedValue: String,
+    message: String? = null,
+) {
+    val actualValue = userProperties[name]
+    if (actualValue != expectedValue) {
+        val errorMessage = message
+            ?: "Expected user property '$name' to be '$expectedValue', but was '$actualValue'"
+        throw AssertionError(errorMessage)
+    }
+}
+
+/** Mock analytics helper that simulates network delays and failures */
+class MockAnalyticsHelper(
+    private val simulateFailures: Boolean = false,
+    private val failureRate: Float = 0.1f,
+) : AnalyticsHelper {
+
+    private val testHelper = TestAnalyticsHelper()
+    private var eventCount = 0
+
+    override fun logEvent(event: AnalyticsEvent) {
+        eventCount++
+
+        if (simulateFailures && (eventCount * failureRate).toInt() > 0 && eventCount % (1 / failureRate).toInt() == 0) {
+            // Simulate failure - don't log the event
+            return
+        }
+
+//        if (simulateNetworkDelay) {
+//            // Simulate network delay (in a real implementation, this would be async)
+//            delay((50..200).random().toLong())
+//        }
+
+        testHelper.logEvent(event)
+    }
+
+    override fun setUserProperty(name: String, value: String) {
+        testHelper.setUserProperty(name, value)
+    }
+
+    override fun setUserId(userId: String) {
+        testHelper.setUserId(userId)
+    }
+
+    // Delegate test helper methods
+    val loggedEvents: List<AnalyticsEvent> get() = testHelper.loggedEvents
+    val userProperties: Map<String, String> get() = testHelper.userProperties
+    val userId: String? get() = testHelper.userId
+
+    fun clear() = testHelper.clear()
+    fun hasEvent(type: String, params: Map<String, String> = emptyMap()) =
+        testHelper.hasEvent(type, params)
+
+    fun getEventCount(type: String) = testHelper.getEventCount(type)
+}

core-base/analytics/src/commonMain/kotlin/template/core/base/analytics/UiHelpers.kt

@@ -0,0 +1,106 @@
+/*
+ * Copyright 2023 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.analytics
+
+import androidx.compose.foundation.clickable
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.staticCompositionLocalOf
+import androidx.compose.ui.Modifier
+
+/**
+ * Global key used to obtain access to the AnalyticsHelper through a CompositionLocal.
+ */
+val LocalAnalyticsHelper = staticCompositionLocalOf<AnalyticsHelper> {
+    // Provide a default AnalyticsHelper which does nothing. This is so that tests and previews
+    // do not have to provide one. For real app builds provide a different implementation.
+    NoOpAnalyticsHelper()
+}
+
+/**
+ * Composable function to track screen views automatically
+ */
+@Composable
+@Suppress("SpreadOperator")
+fun TrackScreenView(
+    screenName: String,
+    sourceScreen: String? = null,
+    additionalParams: Map<String, String> = emptyMap(),
+) {
+    val analytics = LocalAnalyticsHelper.current
+
+    LaunchedEffect(screenName) {
+        analytics.logScreenView(screenName, sourceScreen)
+        // Log additional params if provided
+        if (additionalParams.isNotEmpty()) {
+            analytics.logEvent(
+                Types.SCREEN_VIEW,
+                mapOf(
+                    ParamKeys.SCREEN_NAME to screenName,
+                    *additionalParams.toList().toTypedArray(),
+                ).plus(sourceScreen?.let { mapOf(ParamKeys.SOURCE_SCREEN to it) } ?: emptyMap()),
+            )
+        }
+    }
+}
+
+/**
+ * Modifier extension for tracking button clicks
+ */
+fun Modifier.trackClick(
+    buttonName: String,
+    analytics: AnalyticsHelper,
+    screenName: String? = null,
+    additionalParams: Map<String, String> = emptyMap(),
+): Modifier = this.clickable {
+    analytics.logButtonClick(buttonName, screenName)
+    if (additionalParams.isNotEmpty()) {
+        analytics.logEvent(Types.BUTTON_CLICK, additionalParams)
+    }
+}
+
+/**
+ * Remember analytics helper from composition local
+ */
+@Composable
+fun rememberAnalyticsHelper(): AnalyticsHelper = LocalAnalyticsHelper.current
+
+/**
+ * Effect for tracking when a composable enters/exits composition
+ */
+@Composable
+fun TrackComposableLifecycle(
+    name: String,
+    trackEntry: Boolean = true,
+    trackExit: Boolean = false,
+) {
+    val analytics = LocalAnalyticsHelper.current
+
+    if (trackEntry) {
+        LaunchedEffect(name) {
+            analytics.logEvent(
+                "composable_entered",
+                ParamKeys.CONTENT_NAME to name,
+            )
+        }
+    }
+
+    if (trackExit) {
+        DisposableEffect(name) {
+            onDispose {
+                analytics.logEvent(
+                    "composable_exited",
+                    ParamKeys.CONTENT_NAME to name,
+                )
+            }
+        }
+    }
+}

core-base/analytics/src/commonMain/kotlin/template/core/base/analytics/ValidationUtils.kt

@@ -0,0 +1,403 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.analytics
+
+/** Data validation utilities for analytics events and parameters */
+
+/** Analytics data validator */
+class AnalyticsValidator {
+
+    companion object {
+        // Analytics platform constraints
+        const val MAX_EVENT_NAME_LENGTH = 40
+        const val MAX_PARAM_KEY_LENGTH = 40
+        const val MAX_PARAM_VALUE_LENGTH = 100
+        const val MAX_USER_PROPERTY_NAME_LENGTH = 24
+        const val MAX_USER_PROPERTY_VALUE_LENGTH = 36
+        const val MAX_USER_ID_LENGTH = 256
+        const val MAX_PARAMS_PER_EVENT = 25
+
+        // Validation patterns
+        private val VALID_EVENT_NAME_PATTERN = Regex("^[a-zA-Z][a-zA-Z0-9_]*$")
+        private val VALID_PARAM_KEY_PATTERN = Regex("^[a-zA-Z][a-zA-Z0-9_]*$")
+        private val RESERVED_PREFIXES = setOf("firebase_", "google_", "ga_")
+        private val RESERVED_EVENT_NAMES = setOf(
+            "ad_activeview", "ad_click", "ad_exposure", "ad_impression", "ad_query",
+            "adunit_exposure", "app_clear_data", "app_exception", "app_remove", "app_update",
+            "error", "first_open", "first_visit", "in_app_purchase", "notification_dismiss",
+            "notification_foreground", "notification_open", "notification_receive",
+            "os_update", "screen_view", "session_start", "user_engagement",
+        )
+    }
+
+    /** Validation result */
+    sealed class ValidationResult {
+        object Valid : ValidationResult()
+        data class Invalid(val errors: List<String>) : ValidationResult()
+
+        val isValid: Boolean get() = this is Valid
+        val errorMessages: List<String> get() = if (this is Invalid) errors else emptyList()
+    }
+
+    /** Validate an analytics event */
+    fun validateEvent(event: AnalyticsEvent): ValidationResult {
+        val errors = mutableListOf<String>()
+
+        // Validate event type
+        errors.addAll(validateEventName(event.type))
+
+        // Validate parameter count
+        if (event.extras.size > MAX_PARAMS_PER_EVENT) {
+            errors.add("Event has ${event.extras.size} parameters, maximum allowed is $MAX_PARAMS_PER_EVENT")
+        }
+
+        // Validate each parameter
+        event.extras.forEach { param ->
+            errors.addAll(validateParameter(param))
+        }
+
+        // Check for duplicate parameter keys
+        val duplicateKeys = event.extras.groupBy { it.key }
+            .filter { it.value.size > 1 }
+            .keys
+        if (duplicateKeys.isNotEmpty()) {
+            errors.add("Event has duplicate parameter keys: ${duplicateKeys.joinToString(", ")}")
+        }
+
+        return if (errors.isEmpty()) ValidationResult.Valid else ValidationResult.Invalid(errors)
+    }
+
+    /** Validate event name */
+    fun validateEventName(eventName: String): List<String> {
+        val errors = mutableListOf<String>()
+
+        if (eventName.isBlank()) {
+            errors.add("Event name cannot be blank")
+            return errors
+        }
+
+        if (eventName.length > MAX_EVENT_NAME_LENGTH) {
+            errors.add("Event name '$eventName' exceeds maximum length of $MAX_EVENT_NAME_LENGTH characters")
+        }
+
+        if (!VALID_EVENT_NAME_PATTERN.matches(eventName)) {
+            errors.add(
+                "Event name '$eventName' contains invalid characters." +
+                    " Must start with letter and contain only letters, numbers, and underscores",
+            )
+        }
+
+        if (RESERVED_PREFIXES.any { eventName.startsWith(it) }) {
+            errors.add("Event name '$eventName' uses reserved prefix")
+        }
+
+        if (RESERVED_EVENT_NAMES.contains(eventName)) {
+            errors.add("Event name '$eventName' is reserved")
+        }
+
+        return errors
+    }
+
+    /** Validate parameter */
+    fun validateParameter(param: Param): List<String> {
+        val errors = mutableListOf<String>()
+
+        // Validate key
+        if (param.key.isBlank()) {
+            errors.add("Parameter key cannot be blank")
+        } else {
+            if (param.key.length > MAX_PARAM_KEY_LENGTH) {
+                errors.add(
+                    "Parameter key '${param.key}' " +
+                        "exceeds maximum length of $MAX_PARAM_KEY_LENGTH characters",
+                )
+            }
+
+            if (!VALID_PARAM_KEY_PATTERN.matches(param.key)) {
+                errors.add(
+                    "Parameter key '${param.key}' contains invalid characters. Must start " +
+                        "with letter and contain only letters, numbers, and underscores",
+                )
+            }
+
+            if (RESERVED_PREFIXES.any { param.key.startsWith(it) }) {
+                errors.add("Parameter key '${param.key}' uses reserved prefix")
+            }
+        }
+
+        // Validate value
+        if (param.value.length > MAX_PARAM_VALUE_LENGTH) {
+            errors.add(
+                "Parameter value for key '${param.key}' exceeds maximum" +
+                    " length of $MAX_PARAM_VALUE_LENGTH characters",
+            )
+        }
+
+        return errors
+    }
+
+    /** Validate user property */
+    fun validateUserProperty(name: String, value: String): List<String> {
+        val errors = mutableListOf<String>()
+
+        if (name.isBlank()) {
+            errors.add("User property name cannot be blank")
+        } else {
+            if (name.length > MAX_USER_PROPERTY_NAME_LENGTH) {
+                errors.add(
+                    "User property name '$name' exceeds maximum length " +
+                        "of $MAX_USER_PROPERTY_NAME_LENGTH characters",
+                )
+            }
+
+            if (!VALID_PARAM_KEY_PATTERN.matches(name)) {
+                errors.add("User property name '$name' contains invalid characters")
+            }
+
+            if (RESERVED_PREFIXES.any { name.startsWith(it) }) {
+                errors.add("User property name '$name' uses reserved prefix")
+            }
+        }
+
+        if (value.length > MAX_USER_PROPERTY_VALUE_LENGTH) {
+            errors.add(
+                "User property value for '$name' exceeds maximum " +
+                    "length of $MAX_USER_PROPERTY_VALUE_LENGTH characters",
+            )
+        }
+
+        return errors
+    }
+
+    /** Validate user ID */
+    fun validateUserId(userId: String): List<String> {
+        val errors = mutableListOf<String>()
+
+        if (userId.isBlank()) {
+            errors.add("User ID cannot be blank")
+        }
+
+        if (userId.length > MAX_USER_ID_LENGTH) {
+            errors.add("User ID exceeds maximum length of $MAX_USER_ID_LENGTH characters")
+        }
+
+        return errors
+    }
+
+    /** Sanitize event name to make it valid */
+    fun sanitizeEventName(eventName: String): String {
+        if (eventName.isBlank()) return "unknown_event"
+
+        // Remove invalid characters and ensure it starts with letter
+        var sanitized = eventName.replace(Regex("[^a-zA-Z0-9_]"), "_")
+            .take(MAX_EVENT_NAME_LENGTH)
+
+        // Ensure it starts with a letter
+        if (!sanitized.first().isLetter()) {
+            sanitized = "event_$sanitized"
+        }
+
+        // Avoid reserved names
+        if (RESERVED_EVENT_NAMES.contains(sanitized) || RESERVED_PREFIXES.any {
+                sanitized.startsWith(
+                    it,
+                )
+            }
+        ) {
+            sanitized = "custom_$sanitized"
+        }
+
+        return sanitized.take(MAX_EVENT_NAME_LENGTH)
+    }
+
+    /** Sanitize parameter key to make it valid */
+    fun sanitizeParameterKey(key: String): String {
+        if (key.isBlank()) return "unknown_param"
+
+        var sanitized = key.replace(Regex("[^a-zA-Z0-9_]"), "_")
+            .take(MAX_PARAM_KEY_LENGTH)
+
+        if (!sanitized.first().isLetter()) {
+            sanitized = "param_$sanitized"
+        }
+
+        if (RESERVED_PREFIXES.any { sanitized.startsWith(it) }) {
+            sanitized = "custom_$sanitized"
+        }
+
+        return sanitized.take(MAX_PARAM_KEY_LENGTH)
+    }
+
+    /** Sanitize parameter value to make it valid */
+    fun sanitizeParameterValue(value: String): String {
+        return value.take(MAX_PARAM_VALUE_LENGTH)
+    }
+
+    /** Create a safe parameter with validation and sanitization */
+    fun createSafeParam(key: String, value: String): Param {
+        val sanitizedKey = sanitizeParameterKey(key)
+        val sanitizedValue = sanitizeParameterValue(value)
+        return Param(sanitizedKey, sanitizedValue)
+    }
+
+    /** Create a safe event with validation and sanitization */
+    fun createSafeEvent(type: String, params: List<Param> = emptyList()): AnalyticsEvent {
+        val sanitizedType = sanitizeEventName(type)
+        val sanitizedParams = params.map { createSafeParam(it.key, it.value) }
+            .take(MAX_PARAMS_PER_EVENT)
+
+        return AnalyticsEvent(sanitizedType, sanitizedParams)
+    }
+}
+
+/**
+ * Validating analytics helper that wraps another helper and validates
+ * events
+ */
+class ValidatingAnalyticsHelper(
+    private val delegate: AnalyticsHelper,
+    private val validator: AnalyticsValidator = AnalyticsValidator(),
+    // If true, throws on validation errors; if false, sanitizes
+    private val strictMode: Boolean = false,
+    private val logValidationErrors: Boolean = true,
+) : AnalyticsHelper {
+
+    override fun logEvent(event: AnalyticsEvent) {
+        val validationResult = validator.validateEvent(event)
+
+        when {
+            validationResult.isValid -> {
+                delegate.logEvent(event)
+            }
+
+            strictMode -> {
+                throw IllegalArgumentException(
+                    "Invalid analytics event: ${
+                        validationResult.errorMessages.joinToString(
+                            ", ",
+                        )
+                    }",
+                )
+            }
+
+            else -> {
+                // Sanitize and log
+                val safeEvent = validator.createSafeEvent(event.type, event.extras)
+                delegate.logEvent(safeEvent)
+
+                if (logValidationErrors) {
+                    delegate.logEvent(
+                        AnalyticsEvent(
+                            "analytics_validation_error",
+                            listOf(
+                                Param(key = "original_event_type", value = event.type),
+                                Param(
+                                    key = "errors",
+                                    value = validationResult.errorMessages.joinToString("; "),
+                                ),
+                            ),
+                        ),
+                    )
+                }
+            }
+        }
+    }
+
+    override fun setUserProperty(name: String, value: String) {
+        val errors = validator.validateUserProperty(name, value)
+
+        when {
+            errors.isEmpty() -> {
+                delegate.setUserProperty(name, value)
+            }
+
+            strictMode -> {
+                throw IllegalArgumentException(
+                    "Invalid user property: ${errors.joinToString(", ")}",
+                )
+            }
+
+            else -> {
+                val sanitizedName = validator.sanitizeParameterKey(name)
+                    .take(AnalyticsValidator.MAX_USER_PROPERTY_NAME_LENGTH)
+                val sanitizedValue = value.take(AnalyticsValidator.MAX_USER_PROPERTY_VALUE_LENGTH)
+                delegate.setUserProperty(sanitizedName, sanitizedValue)
+
+                if (logValidationErrors && errors.isNotEmpty()) {
+                    delegate.logEvent(
+                        AnalyticsEvent(
+                            "user_property_validation_error",
+                            listOf(
+                                Param("property_name", name),
+                                Param("errors", errors.joinToString("; ")),
+                            ),
+                        ),
+                    )
+                }
+            }
+        }
+    }
+
+    override fun setUserId(userId: String) {
+        val errors = validator.validateUserId(userId)
+
+        when {
+            errors.isEmpty() -> {
+                delegate.setUserId(userId)
+            }
+
+            strictMode -> {
+                throw IllegalArgumentException("Invalid user ID: ${errors.joinToString(", ")}")
+            }
+
+            else -> {
+                val sanitizedUserId = userId.take(AnalyticsValidator.MAX_USER_ID_LENGTH)
+                delegate.setUserId(sanitizedUserId)
+
+                if (logValidationErrors && errors.isNotEmpty()) {
+                    delegate.logEvent(
+                        AnalyticsEvent(
+                            "user_id_validation_error",
+                            listOf(
+                                Param("errors", errors.joinToString("; ")),
+                            ),
+                        ),
+                    )
+                }
+            }
+        }
+    }
+}
+
+/** Extension to wrap any analytics helper with validation */
+fun AnalyticsHelper.withValidation(
+    strictMode: Boolean = false,
+    logValidationErrors: Boolean = true,
+    validator: AnalyticsValidator = AnalyticsValidator(),
+): AnalyticsHelper = ValidatingAnalyticsHelper(this, validator, strictMode, logValidationErrors)
+
+/** Extension to validate an event without logging it */
+fun AnalyticsEvent.validate(
+    validator: AnalyticsValidator = AnalyticsValidator(),
+): AnalyticsValidator.ValidationResult {
+    return validator.validateEvent(this)
+}
+
+/** Extension to check if an event is valid */
+fun AnalyticsEvent.isValid(validator: AnalyticsValidator = AnalyticsValidator()): Boolean {
+    return validator.validateEvent(this).isValid
+}
+
+/** Extension to sanitize an event */
+fun AnalyticsEvent.sanitize(
+    validator: AnalyticsValidator = AnalyticsValidator(),
+): AnalyticsEvent {
+    return validator.createSafeEvent(this.type, this.extras)
+}

core-base/analytics/src/commonMain/kotlin/template/core/base/analytics/di/AnalyticsModule.kt

@@ -0,0 +1,14 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.analytics.di
+
+import org.koin.core.module.Module
+
+expect val analyticsModule: Module

core-base/analytics/src/desktopMain/kotlin/template/core/base/analytics/di/AnalyticsModule.desktop.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.analytics.di
+
+import org.koin.core.module.Module
+import org.koin.core.module.dsl.singleOf
+import org.koin.dsl.bind
+import org.koin.dsl.module
+import template.core.base.analytics.AnalyticsHelper
+import template.core.base.analytics.StubAnalyticsHelper
+
+actual val analyticsModule: Module
+    get() = module {
+        singleOf(::StubAnalyticsHelper) bind AnalyticsHelper::class
+    }

core-base/analytics/src/jsMain/kotlin/template.core.base.analytics/di/AnalyticsModule.js.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+@file:Suppress("InvalidPackageDeclaration")
+
+package template.core.base.analytics.di
+
+import org.koin.core.module.Module
+import org.koin.core.module.dsl.singleOf
+import org.koin.dsl.bind
+import org.koin.dsl.module
+import template.core.base.analytics.AnalyticsHelper
+import template.core.base.analytics.StubAnalyticsHelper
+
+actual val analyticsModule: Module
+    get() = module {
+
+        // Enable this when Firebase Project is set up
+        // single<FirebaseAnalytics> { Firebase.analytics }
+        // singleOf(::FirebaseAnalyticsHelper) bind AnalyticsHelper::class
+
+        singleOf(::StubAnalyticsHelper) bind AnalyticsHelper::class
+    }

core-base/analytics/src/nativeMain/kotlin/template.core.base.analytics.di/AnalyticsModule.native.kt

@@ -0,0 +1,28 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+@file:Suppress("InvalidPackageDeclaration")
+
+package template.core.base.analytics.di
+
+import dev.gitlive.firebase.Firebase
+import dev.gitlive.firebase.analytics.FirebaseAnalytics
+import dev.gitlive.firebase.analytics.analytics
+import org.koin.core.module.Module
+import org.koin.core.module.dsl.singleOf
+import org.koin.dsl.bind
+import org.koin.dsl.module
+import template.core.base.analytics.AnalyticsHelper
+import template.core.base.analytics.FirebaseAnalyticsHelper
+
+actual val analyticsModule: Module
+    get() = module {
+        single<FirebaseAnalytics> { Firebase.analytics }
+        singleOf(::FirebaseAnalyticsHelper) bind AnalyticsHelper::class
+    }

core-base/analytics/src/nonJsCommonMain/kotlin/template/core/base/analytics/FirebaseAnalyticsHelper.kt

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.analytics
+
+import dev.gitlive.firebase.analytics.FirebaseAnalytics
+import dev.gitlive.firebase.analytics.logEvent
+
+/**
+ * Production implementation of [AnalyticsHelper] that sends events to Firebase Analytics.
+ *
+ * This implementation provides a complete analytics solution using Firebase Analytics
+ * as the backend service. It handles automatic parameter validation, length truncation
+ * according to Firebase constraints, and provides full user tracking capabilities.
+ *
+ * **Features:**
+ * - **Automatic Truncation**: Parameters are automatically truncated to Firebase limits
+ * - **User Tracking**: Full support for user properties and user ID tracking
+ * - **Cross-Platform**: Works on Android, iOS, and other supported Firebase platforms
+ * - **Real-time Processing**: Events are sent to Firebase for real-time analytics
+ * - **Integration**: Seamlessly integrates with Firebase Console and other Firebase services
+ *
+ * **Firebase Analytics Constraints:**
+ * - Event names: ≤ 40 characters
+ * - Parameter keys: ≤ 40 characters
+ * - Parameter values: ≤ 100 characters
+ * - User property names: ≤ 24 characters
+ * - User property values: ≤ 36 characters
+ * - Maximum parameters per event: 25
+ *
+ * **Setup Requirements:**
+ * - Firebase project configured with Analytics enabled
+ * - Platform-specific Firebase SDK configuration
+ * - Google Services configuration files (google-services.json, GoogleService-Info.plist)
+ *
+ * @param firebaseAnalytics The Firebase Analytics instance to use for logging events.
+ *                         This should be properly configured for the target platform.
+ *
+ * @see AnalyticsHelper for the complete interface contract
+ * @see StubAnalyticsHelper for development/debugging implementation
+ * @see NoOpAnalyticsHelper for no-operation implementation
+ *
+ * @sample
+ * ```kotlin
+ * // Typical DI setup for production builds
+ * val analyticsModule = module {
+ *     single<AnalyticsHelper> {
+ *         FirebaseAnalyticsHelper(Firebase.analytics)
+ *     }
+ * }
+ * ```
+ *
+ * @since 1.0.0
+ */
+internal class FirebaseAnalyticsHelper(
+    private val firebaseAnalytics: FirebaseAnalytics,
+) : AnalyticsHelper {
+
+    /**
+     * Logs an analytics event to Firebase Analytics with automatic parameter truncation.
+     *
+     * This method sends the event to Firebase Analytics, automatically truncating
+     * parameter keys and values to meet Firebase's length constraints. The event
+     * will appear in the Firebase Console within a few hours for standard events.
+     *
+     * @param event The analytics event to log. Parameters will be automatically
+     *              truncated if they exceed Firebase limits.
+     */
+    override fun logEvent(event: AnalyticsEvent) {
+        firebaseAnalytics.logEvent(event.type) {
+            for (extra in event.extras) {
+                // Truncate parameter keys and values according to firebase maximum length values.
+                param(
+                    key = extra.key.take(40),
+                    value = extra.value.take(100),
+                )
+            }
+        }
+    }
+
+    /**
+     * Sets a user property in Firebase Analytics with automatic length truncation.
+     *
+     * User properties are attributes you define to describe segments of your user base.
+     * They're useful for creating audiences and can be used as filters in Firebase reports.
+     * Properties are automatically truncated to Firebase's length limits.
+     *
+     * @param name The user property name (≤ 24 characters after truncation)
+     * @param value The user property value (≤ 36 characters after truncation)
+     */
+    override fun setUserProperty(name: String, value: String) {
+        firebaseAnalytics.setUserProperty(name.take(24), value.take(36))
+    }
+
+    /**
+     * Sets the user ID in Firebase Analytics for cross-session user tracking.
+     *
+     * The user ID enables you to associate events with specific users across
+     * sessions and devices. This helps create a more complete picture of user
+     * behavior and enables advanced analytics features.
+     *
+     * **Privacy Note**: Ensure the user ID doesn't contain personally identifiable
+     * information and complies with privacy regulations.
+     *
+     * @param userId The unique user identifier. Should not contain PII and must
+     *               be consistent across sessions for the same user.
+     */
+    override fun setUserId(userId: String) {
+        firebaseAnalytics.setUserId(userId)
+    }
+}

core-base/analytics/src/wasmJsMain/kotlin/template/core/base/analytics/di/AnalyticsModule.wasmJs.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.analytics.di
+
+import org.koin.core.module.Module
+import org.koin.core.module.dsl.singleOf
+import org.koin.dsl.bind
+import org.koin.dsl.module
+import template.core.base.analytics.AnalyticsHelper
+import template.core.base.analytics.StubAnalyticsHelper
+
+actual val analyticsModule: Module
+    get() = module {
+        singleOf(::StubAnalyticsHelper) bind AnalyticsHelper::class
+    }

core-base/common/.gitignore

@@ -0,0 +1 @@
+/build

core-base/common/README.md

@@ -0,0 +1 @@
+# :core:common module

core-base/common/build.gradle.kts

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+plugins {
+    alias(libs.plugins.mifos.kmp.library)
+    alias(libs.plugins.kotlin.parcelize)
+}
+
+android {
+    namespace = "template.core.base.common"
+}
+
+kotlin {
+    sourceSets {
+        commonMain.dependencies {
+            implementation(libs.kotlinx.coroutines.core)
+            api(libs.kermit.logging)
+            api(libs.squareup.okio)
+            api(libs.jb.kotlin.stdlib)
+            api(libs.kotlinx.datetime)
+        }
+
+        androidMain.dependencies {
+            implementation(libs.kotlinx.coroutines.android)
+        }
+        commonTest.dependencies {
+            implementation(libs.kotlinx.coroutines.test)
+        }
+        iosMain.dependencies {
+            api(libs.kermit.simple)
+        }
+        desktopMain.dependencies {
+            implementation(libs.kotlinx.coroutines.swing)
+            implementation(libs.kotlin.reflect)
+        }
+        jsMain.dependencies {
+            api(libs.jb.kotlin.stdlib.js)
+            api(libs.jb.kotlin.dom)
+        }
+    }
+}

core-base/common/src/androidMain/AndroidManifest.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    Copyright 2025 Mifos Initiative
+
+    This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
+    If a copy of the MPL was not distributed with this file,
+    You can obtain one at https://mozilla.org/MPL/2.0/.
+
+    See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+-->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+</manifest>

core-base/common/src/androidMain/kotlin/template/core/base/common/Parcelize.android.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.common
+
+import android.os.Parcel
+import android.os.Parcelable
+import kotlinx.parcelize.IgnoredOnParcel
+import kotlinx.parcelize.Parceler
+import kotlinx.parcelize.Parcelize
+import kotlinx.parcelize.TypeParceler
+
+actual typealias Parcelize = Parcelize
+
+actual typealias Parcelable = Parcelable
+
+actual typealias IgnoredOnParcel = IgnoredOnParcel
+
+actual typealias Parceler<P> = Parceler<P>
+
+actual typealias TypeParceler<T, P> = TypeParceler<T, P>
+
+actual typealias Parcel = Parcel

core-base/common/src/androidMain/kotlin/template/core/base/common/di/CommonModule.android.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.common.di
+
+import org.koin.core.module.Module
+import org.koin.dsl.module
+import template.core.base.common.manager.DispatcherManager
+import template.core.base.common.manager.DispatcherManagerImpl
+
+actual val dispatcherManagerModule: Module
+    get() = module {
+        single<DispatcherManager> { DispatcherManagerImpl() }
+    }

core-base/common/src/androidMain/kotlin/template/core/base/common/manager/DispatchManagerImpl.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+@file:Suppress("ktlint:standard:filename", "MatchingDeclarationName")
+
+package template.core.base.common.manager
+
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.MainCoroutineDispatcher
+import kotlinx.coroutines.SupervisorJob
+
+class DispatcherManagerImpl : DispatcherManager {
+    override val default: CoroutineDispatcher = Dispatchers.IO
+
+    override val main: MainCoroutineDispatcher = Dispatchers.Main
+
+    override val io: CoroutineDispatcher = Dispatchers.Default
+
+    override val unconfined: CoroutineDispatcher = Dispatchers.Unconfined
+
+    override val appScope: CoroutineScope
+        get() = CoroutineScope(SupervisorJob() + Dispatchers.Default)
+}

core-base/common/src/commonMain/kotlin/template/core/base/common/DataState.kt

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.common
+
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.onStart
+
+sealed class DataState<out T> {
+
+    /** Data that is being wrapped by [DataState]. */
+    abstract val data: T?
+
+    /** Loading state that has no data is available. */
+    data object Loading : DataState<Nothing>() {
+        override val data: Nothing? get() = null
+    }
+
+    /** Loaded state that has data available. */
+    data class Success<T>(
+        override val data: T,
+    ) : DataState<T>()
+
+    /** Pending state that has data available. */
+    data class Pending<T>(
+        override val data: T,
+    ) : DataState<T>()
+
+    /** Error state that may have data available. */
+    data class Error<T>(
+        val error: Throwable,
+        override val data: T? = null,
+    ) : DataState<T>()
+
+    /** No network state that may have data is available. */
+    data class NoNetwork<T>(
+        override val data: T? = null,
+    ) : DataState<T>()
+}
+
+fun <T> Flow<T>.asDataStateFlow(): Flow<DataState<T>> =
+    map<T, DataState<T>> { DataState.Success(it) }
+        .onStart { emit(DataState.Loading) }
+        .catch { emit(DataState.Error(it, null)) }

core-base/common/src/commonMain/kotlin/template/core/base/common/DataStateExtensions.kt

@@ -0,0 +1,129 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.common
+
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.transformWhile
+import kotlinx.coroutines.flow.update
+
+inline fun <T : Any?, R : Any?> DataState<T>.map(
+    transform: (T) -> R,
+): DataState<R> = when (this) {
+    is DataState.Success -> DataState.Success(transform(data))
+    is DataState.Loading -> DataState.Loading
+    is DataState.Pending -> DataState.Pending(transform(data))
+    is DataState.Error -> DataState.Error(error, data?.let(transform))
+    is DataState.NoNetwork -> DataState.NoNetwork(data?.let(transform))
+}
+
+inline fun <T : Any?, R : Any?> DataState<T>.mapNullable(
+    transform: (T?) -> R,
+): DataState<R> = when (this) {
+    is DataState.Success -> DataState.Success(data = transform(data))
+    is DataState.Loading -> DataState.Loading
+    is DataState.Pending -> DataState.Pending(data = transform(data))
+    is DataState.Error -> DataState.Error(error = error, data = transform(data))
+    is DataState.NoNetwork -> DataState.NoNetwork(data = transform(data))
+}
+
+fun <T : Any?> Flow<DataState<T>>.takeUntilSuccess(): Flow<DataState<T>> = transformWhile {
+    emit(it)
+    it !is DataState.Success
+}
+
+fun <T : Any?> MutableStateFlow<DataState<T>>.updateToPendingOrLoading() {
+    update { dataState ->
+        dataState.data
+            ?.let { data -> DataState.Pending(data = data) }
+            ?: DataState.Loading
+    }
+}
+
+fun <T1, T2, R> combineDataStates(
+    dataState1: DataState<T1>,
+    dataState2: DataState<T2>,
+    transform: (t1: T1, t2: T2) -> R,
+): DataState<R> {
+    // Wraps the `transform` lambda to allow null data to be passed in. If either of the passed in
+    // values are null, the regular transform will not be invoked and null is returned.
+    val nullableTransform: (T1?, T2?) -> R? = { t1, t2 ->
+        if (t1 != null && t2 != null) transform(t1, t2) else null
+    }
+    return when {
+        // Error states have highest priority, fail fast.
+        dataState1 is DataState.Error -> {
+            DataState.Error(
+                error = dataState1.error,
+                data = nullableTransform(dataState1.data, dataState2.data),
+            )
+        }
+
+        dataState2 is DataState.Error -> {
+            DataState.Error(
+                error = dataState2.error,
+                data = nullableTransform(dataState1.data, dataState2.data),
+            )
+        }
+
+        dataState1 is DataState.NoNetwork || dataState2 is DataState.NoNetwork -> {
+            DataState.NoNetwork(nullableTransform(dataState1.data, dataState2.data))
+        }
+
+        // Something is still loading, we will wait for all the data.
+        dataState1 is DataState.Loading || dataState2 is DataState.Loading -> DataState.Loading
+
+        // Pending state for everything while any one piece of data is updating.
+        dataState1 is DataState.Pending || dataState2 is DataState.Pending -> {
+            @Suppress("UNCHECKED_CAST")
+            DataState.Pending(transform(dataState1.data as T1, dataState2.data as T2))
+        }
+
+        // Both states are Success and have data
+        else -> {
+            @Suppress("UNCHECKED_CAST")
+            DataState.Success(transform(dataState1.data as T1, dataState2.data as T2))
+        }
+    }
+}
+
+fun <T1, T2, T3, R> combineDataStates(
+    dataState1: DataState<T1>,
+    dataState2: DataState<T2>,
+    dataState3: DataState<T3>,
+    transform: (t1: T1, t2: T2, t3: T3) -> R,
+): DataState<R> =
+    dataState1
+        .combineDataStatesWith(dataState2) { t1, t2 -> t1 to t2 }
+        .combineDataStatesWith(dataState3) { t1t2Pair, t3 ->
+            transform(t1t2Pair.first, t1t2Pair.second, t3)
+        }
+
+fun <T1, T2, T3, T4, R> combineDataStates(
+    dataState1: DataState<T1>,
+    dataState2: DataState<T2>,
+    dataState3: DataState<T3>,
+    dataState4: DataState<T4>,
+    transform: (t1: T1, t2: T2, t3: T3, t4: T4) -> R,
+): DataState<R> =
+    dataState1
+        .combineDataStatesWith(dataState2) { t1, t2 -> t1 to t2 }
+        .combineDataStatesWith(dataState3) { t1t2Pair, t3 ->
+            Triple(t1t2Pair.first, t1t2Pair.second, t3)
+        }
+        .combineDataStatesWith(dataState4) { t1t2t3Triple, t3 ->
+            transform(t1t2t3Triple.first, t1t2t3Triple.second, t1t2t3Triple.third, t3)
+        }
+
+fun <T1, T2, R> DataState<T1>.combineDataStatesWith(
+    dataState2: DataState<T2>,
+    transform: (t1: T1, t2: T2) -> R,
+): DataState<R> =
+    combineDataStates(this, dataState2, transform)

core-base/common/src/commonMain/kotlin/template/core/base/common/ImageExtension.kt

@@ -0,0 +1,102 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.common
+
+import kotlin.io.encoding.Base64
+import kotlin.io.encoding.ExperimentalEncodingApi
+
+/**
+ * Extension function to convert ByteArray to Base64 string
+ */
+@OptIn(ExperimentalEncodingApi::class)
+fun ByteArray.toBase64(): String {
+    return Base64.encode(this)
+}
+
+/**
+ * Extension function to convert ByteArray to Base64 string with data URI prefix
+ * @param mimeType The MIME type of the data (e.g., "image/png", "image/jpeg")
+ */
+@OptIn(ExperimentalEncodingApi::class)
+fun ByteArray.toBase64DataUri(mimeType: String = "application/octet-stream"): String {
+    return "data:$mimeType;base64,${Base64.encode(this)}"
+}
+
+/**
+ * Extension function to convert Base64 string to ByteArray
+ * @throws IllegalArgumentException if the string is not valid Base64
+ */
+@OptIn(ExperimentalEncodingApi::class)
+fun String.fromBase64(): ByteArray {
+    return Base64.decode(this)
+}
+
+/**
+ * Extension function to safely convert Base64 string to ByteArray
+ * @return ByteArray if successful, null if the string is not valid Base64
+ */
+@OptIn(ExperimentalEncodingApi::class)
+fun String.fromBase64OrNull(): ByteArray? {
+    return try {
+        Base64.decode(this)
+    } catch (e: IllegalArgumentException) {
+        null
+    }
+}
+
+/**
+ * Extension function to convert Base64 data URI to ByteArray
+ * Handles data URIs in format: "data:mime/type;base64,actualBase64Data"
+ * @return ByteArray of the decoded data
+ * @throws IllegalArgumentException if the data URI format is invalid
+ */
+@OptIn(ExperimentalEncodingApi::class)
+fun String.fromBase64DataUri(): ByteArray {
+    val dataUriPrefix = "data:"
+    val base64Prefix = ";base64,"
+
+    require(this.startsWith(dataUriPrefix)) {
+        "Invalid data URI: must start with 'data:'"
+    }
+
+    val base64Index = this.indexOf(base64Prefix)
+    require(base64Index != -1) {
+        "Invalid data URI: missing ';base64,' separator"
+    }
+
+    val base64Data = this.substring(base64Index + base64Prefix.length)
+    return Base64.decode(base64Data)
+}
+
+/**
+ * Extension function to safely convert Base64 data URI to ByteArray
+ * @return ByteArray if successful, null if the data URI format is invalid
+ */
+@OptIn(ExperimentalEncodingApi::class)
+fun String.fromBase64DataUriOrNull(): ByteArray? {
+    return try {
+        fromBase64DataUri()
+    } catch (e: IllegalArgumentException) {
+        null
+    }
+}
+
+/**
+ * Extension function to extract MIME type from Base64 data URI
+ * @return MIME type string or null if not a valid data URI
+ */
+fun String.extractMimeTypeFromDataUri(): String? {
+    val dataUriPrefix = "data:"
+    val base64Prefix = ";base64,"
+
+    return takeIf { it.startsWith(dataUriPrefix) && it.contains(base64Prefix) }
+        ?.substringAfter(dataUriPrefix)
+        ?.substringBefore(base64Prefix)
+}

core-base/common/src/commonMain/kotlin/template/core/base/common/Parcelize.kt

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.common
+
+expect annotation class Parcelize()
+
+expect interface Parcelable
+
+expect annotation class IgnoredOnParcel()
+
+expect interface Parceler<P> {
+    fun create(parcel: Parcel): P
+
+    fun P.write(parcel: Parcel, flags: Int)
+}
+
+expect annotation class TypeParceler<T, P : Parceler<in T>>()
+
+expect class Parcel {
+    fun readByte(): Byte
+    fun readInt(): Int
+
+    fun readFloat(): Float
+    fun readDouble(): Double
+    fun readString(): String?
+
+    fun writeByte(value: Byte)
+    fun writeInt(value: Int)
+
+    fun writeFloat(value: Float)
+
+    fun writeDouble(value: Double)
+    fun writeString(value: String?)
+}

core-base/common/src/commonMain/kotlin/template/core/base/common/di/CommonModule.kt

@@ -0,0 +1,19 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.common.di
+
+import org.koin.core.module.Module
+import org.koin.dsl.module
+
+val CommonModule = module {
+    includes(dispatcherManagerModule)
+}
+
+expect val dispatcherManagerModule: Module

core-base/common/src/commonMain/kotlin/template/core/base/common/manager/DispatcherManager.kt

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.common.manager
+
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.MainCoroutineDispatcher
+
+interface DispatcherManager {
+    /**
+     * The default [CoroutineDispatcher] for the app.
+     */
+    val default: CoroutineDispatcher
+
+    /**
+     * The [MainCoroutineDispatcher] for the app.
+     */
+    val main: MainCoroutineDispatcher
+
+    /**
+     * The IO [CoroutineDispatcher] for the app.
+     */
+    val io: CoroutineDispatcher
+
+    /**
+     * The unconfined [CoroutineDispatcher] for the app.
+     */
+    val unconfined: CoroutineDispatcher
+
+    val appScope: CoroutineScope
+}

core-base/common/src/nonAndroidMain/kotlin/template/core/base/common/Parcelize.nonAndroid.kt

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.common
+
+actual interface Parcelable
+actual annotation class IgnoredOnParcel
+actual annotation class Parcelize
+actual interface Parceler<P> {
+    actual fun create(parcel: Parcel): P
+    actual fun P.write(parcel: Parcel, flags: Int)
+}
+
+actual annotation class TypeParceler<T, P : Parceler<in T>>
+
+actual class Parcel {
+    actual fun readString(): String? = null
+    actual fun readByte(): Byte = 1
+
+    actual fun readInt(): Int = 1
+
+    actual fun readFloat(): Float = 1f
+
+    actual fun readDouble(): Double = 1.0
+
+    actual fun writeByte(value: Byte) {
+    }
+
+    actual fun writeInt(value: Int) {
+    }
+
+    actual fun writeFloat(value: Float) {
+    }
+
+    actual fun writeDouble(value: Double) {
+    }
+
+    actual fun writeString(value: String?) {
+    }
+}

core-base/common/src/nonAndroidMain/kotlin/template/core/base/common/di/CommonModule.nonAndroid.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.common.di
+
+import org.koin.core.module.Module
+import org.koin.dsl.module
+import template.core.base.common.manager.DispatcherManager
+import template.core.base.common.manager.DispatcherManagerImpl
+
+actual val dispatcherManagerModule: Module
+    get() = module {
+        single<DispatcherManager> { DispatcherManagerImpl() }
+    }

core-base/common/src/nonAndroidMain/kotlin/template/core/base/common/manager/DispatchManagerImpl.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+@file:Suppress("ktlint:standard:filename", "MatchingDeclarationName")
+
+package template.core.base.common.manager
+
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.MainCoroutineDispatcher
+import kotlinx.coroutines.SupervisorJob
+
+class DispatcherManagerImpl : DispatcherManager {
+    override val default: CoroutineDispatcher = Dispatchers.Default
+
+    override val main: MainCoroutineDispatcher = Dispatchers.Main
+
+    override val io: CoroutineDispatcher = Dispatchers.Default
+
+    override val unconfined: CoroutineDispatcher = Dispatchers.Unconfined
+
+    override val appScope: CoroutineScope
+        get() = CoroutineScope(SupervisorJob() + Dispatchers.Default)
+}

core-base/database/.gitignore

@@ -0,0 +1 @@
+/build

core-base/database/README.md

@@ -0,0 +1,220 @@
+# Core Base Database Module
+
+A Kotlin Multiplatform library that provides cross-platform database abstractions using Room
+database for Android, Desktop, and Native platforms.
+
+## Overview
+
+This module serves as a foundational database layer for the Mifos Initiative applications, enabling
+consistent database operations across Android, Desktop (JVM), and Native (iOS/macOS) platforms using
+the Room persistence library.
+
+## Architecture
+
+The module follows the Kotlin Multiplatform expect/actual pattern to provide platform-specific
+implementations while maintaining a common interface:
+
+### Common Module (`commonMain`)
+
+- **Room.kt**: Defines expect declarations for Room annotations (`@Dao`, `@Entity`, `@Query`, etc.)
+- **TypeConverter.kt**: Defines expect declaration for `@TypeConverter` annotation
+- **OnConflictStrategy**: Platform-agnostic constants for database conflict resolution
+
+### Platform-Specific Modules
+
+- **Android (`androidMain`)**: Uses androidx.room directly with Android Context
+- **Desktop (`desktopMain`)**: Uses androidx.room with file-based database storage
+- **Native (`nativeMain`)**: Uses androidx.room with iOS/macOS document directory storage
+
+## Key Components
+
+### AppDatabaseFactory
+
+Platform-specific factory classes that handle database creation and configuration:
+
+#### Android Implementation
+
+- Requires Android `Context` for database creation
+- Uses `Room.databaseBuilder()` with application context
+- Stores databases in standard Android app data directory
+
+#### Desktop Implementation
+
+- Creates databases in platform-appropriate directories:
+    - **Windows**: `%APPDATA%/MifosDatabase`
+    - **macOS**: `~/Library/Application Support/MifosDatabase`
+    - **Linux**: `~/.local/share/MifosDatabase`
+- Uses inline reified generics for type-safe database instantiation
+
+#### Native Implementation
+
+- Stores databases in iOS/macOS document directory
+- Uses platform-specific file system APIs
+- Leverages Kotlin/Native interop for Foundation framework access
+
+### Room Annotations
+
+Cross-platform type aliases for Room annotations that ensure consistent API across all platforms:
+
+- `@Dao` - Data Access Object annotation
+- `@Entity` - Database entity annotation
+- `@Query` - SQL query annotation
+- `@Insert` - Insert operation annotation
+- `@PrimaryKey` - Primary key annotation
+- `@ForeignKey` - Foreign key constraint annotation
+- `@Index` - Database index annotation
+- `@TypeConverter` - Type conversion annotation
+
+## Usage Examples
+
+### Basic Setup
+
+#### Android
+
+```kotlin
+class MyApplication : Application() {
+    val databaseFactory = AppDatabaseFactory(this)
+
+    val database = databaseFactory
+        .createDatabase(MyDatabase::class.java, "my_database.db")
+        .build()
+}
+```
+
+#### Desktop
+
+```kotlin
+class DesktopApp {
+    val databaseFactory = AppDatabaseFactory()
+
+    val database = databaseFactory
+        .createDatabase<MyDatabase>("my_database.db")
+        .build()
+}
+```
+
+#### Native (iOS/macOS)
+
+```kotlin
+class IOSApp {
+    val databaseFactory = AppDatabaseFactory()
+
+    val database = databaseFactory
+        .createDatabase<MyDatabase>("my_database.db")
+        .build()
+}
+```
+
+### Defining Entities
+
+```kotlin
+@Entity(tableName = "users")
+data class User(
+    @PrimaryKey(autoGenerate = true)
+    val id: Long = 0,
+    val name: String,
+    val email: String
+)
+```
+
+### Creating DAOs
+
+```kotlin
+@Dao
+interface UserDao {
+    @Query("SELECT * FROM users")
+    suspend fun getAllUsers(): List<User>
+
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun insertUser(user: User)
+
+    @Query("DELETE FROM users WHERE id = :userId")
+    suspend fun deleteUser(userId: Long)
+}
+```
+
+### Database Definition
+
+```kotlin
+@Database(
+    entities = [User::class],
+    version = 1,
+    exportSchema = false
+)
+abstract class MyDatabase : RoomDatabase() {
+    abstract fun userDao(): UserDao
+}
+```
+
+## Dependencies
+
+The module relies on the following key dependencies:
+
+- **androidx.room.runtime**: Core Room database functionality
+- **Kotlin Multiplatform**: Cross-platform code sharing
+- **Platform-specific APIs**: Context (Android), File system (Desktop), Foundation (Native)
+
+## Configuration
+
+### Gradle Setup
+
+```kotlin
+kotlin {
+    sourceSets {
+        androidMain.dependencies {
+            implementation(libs.androidx.room.runtime)
+        }
+        desktopMain.dependencies {
+            implementation(libs.androidx.room.runtime)
+        }
+        nativeMain.dependencies {
+            implementation(libs.androidx.room.runtime)
+        }
+    }
+}
+```
+
+## Platform Considerations
+
+### Android
+
+- Requires minimum API level compatible with Room
+- Database files stored in internal app storage
+- Supports all Room features including migrations and type converters
+
+### Desktop
+
+- Cross-platform directory selection ensures proper database placement
+- Supports full Room functionality on JVM
+- Automatic directory creation for database storage
+
+### Native (iOS/macOS)
+
+- Uses iOS/macOS document directory for database storage
+- Leverages Kotlin/Native C interop for platform APIs
+- Requires iOS/macOS specific Room dependencies
+
+## Best Practices
+
+1. **Database Versioning**: Always increment version numbers when changing schema
+2. **Migration Strategy**: Implement proper Room migrations for schema changes
+3. **Type Converters**: Use `@TypeConverter` for complex data types
+4. **Conflict Resolution**: Choose appropriate `OnConflictStrategy` for your use case
+5. **Testing**: Test database operations on all target platforms
+
+## Contributing
+
+When contributing to this module:
+
+- Maintain expect/actual pattern consistency
+- Test changes across all supported platforms
+- Update documentation for any API changes
+- Follow Kotlin coding conventions
+- Ensure proper license headers on all files
+
+## License
+
+This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of
+the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+See https://github.com/openMF/kmp-project-template/blob/main/LICENSE for more details.

core-base/database/build.gradle.kts

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+import org.jetbrains.compose.compose
+
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/kmp-project-template/blob/main/LICENSE
+ */
+plugins {
+    alias(libs.plugins.mifos.kmp.library)
+}
+
+android {
+    namespace = "template.core.base.database"
+}
+
+kotlin {
+    sourceSets {
+        androidMain.dependencies {
+            implementation(libs.androidx.room.runtime)
+        }
+
+        desktopMain.dependencies {
+            implementation(libs.androidx.room.runtime)
+        }
+
+        nativeMain.dependencies {
+            implementation(libs.androidx.room.runtime)
+        }
+
+        nonJsCommonMain.dependencies {
+            implementation(libs.androidx.room.runtime)
+        }
+    }
+}

core-base/database/src/androidMain/kotlin/template/core/base/database/AppDatabaseFactory.kt

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.database
+
+import android.content.Context
+import androidx.room.Room
+import androidx.room.RoomDatabase
+
+/**
+ * Android-specific implementation of the database factory for creating Room database instances.
+ *
+ * This factory class provides a standardized approach to database creation on Android platforms,
+ * ensuring proper context handling and consistent database configuration across the application.
+ * The factory leverages Android's application context to prevent memory leaks and maintain
+ * database accessibility throughout the application lifecycle.
+ *
+ * Key features:
+ * - Automatic application context usage to prevent memory leaks
+ * - Type-safe database creation with compile-time verification
+ * - Consistent database naming and configuration
+ * - Integration with Android's storage systems
+ *
+ * @param context The Android context used for database creation, typically an Application or Activity context
+ *
+ * @see androidx.room.Room
+ * @see androidx.room.RoomDatabase
+ */
+class AppDatabaseFactory(
+    private val context: Context,
+) {
+
+    /**
+     * Creates a Room database builder configured for Android environments.
+     *
+     * This method constructs a RoomDatabase.Builder instance that can be further customized
+     * with additional configuration options such as migrations, type converters, or callback
+     * handlers before building the final database instance.
+     *
+     * The method automatically uses the application context to ensure the database remains
+     * accessible throughout the application lifecycle while preventing potential memory leaks
+     * that could occur when using activity or service contexts.
+     *
+     * @param T The type of RoomDatabase to create, must extend RoomDatabase
+     * @param databaseClass The Class object representing the database type to instantiate
+     * @param databaseName The name of the database file to create or access
+     * @return A RoomDatabase.Builder instance ready for additional configuration and building
+     *
+     * @throws IllegalArgumentException if the database class is invalid or cannot be instantiated
+     * @throws SQLiteException if there are issues with database creation or access
+     *
+     * Example usage:
+     * ```kotlin
+     * class MyApplication : Application() {
+     *     private val databaseFactory = AppDatabaseFactory(this)
+     *
+     *     val userDatabase: UserDatabase by lazy {
+     *         databaseFactory
+     *             .createDatabase(UserDatabase::class.java, "user_database.db")
+     *             .addMigrations(MIGRATION_1_2, MIGRATION_2_3)
+     *             .addTypeConverter(DateConverters())
+     *             .build()
+     *     }
+     * }
+     * ```
+     *
+     * Configuration recommendations:
+     * - Use descriptive database names that reflect their purpose
+     * - Consider implementing proper migration strategies for schema changes
+     * - Add appropriate type converters for complex data types
+     * - Configure database callbacks for initialization or validation logic
+     */
+    fun <T : RoomDatabase> createDatabase(databaseClass: Class<T>, databaseName: String): RoomDatabase.Builder<T> {
+        return Room.databaseBuilder(
+            context.applicationContext,
+            databaseClass,
+            databaseName,
+        )
+    }
+}

core-base/database/src/commonMain/kotlin/template/core/base/database/Room.kt

@@ -0,0 +1,236 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.database
+
+import kotlin.reflect.KClass
+
+/**
+ * Cross-platform annotation for marking interfaces as Data Access Objects (DAOs).
+ *
+ * This annotation is used to mark interfaces that contain database access methods.
+ * The Room persistence library will generate implementations of these interfaces
+ * at compile time.
+ *
+ * Example:
+ * ```kotlin
+ * @Dao
+ * interface UserDao {
+ *     @Query("SELECT * FROM users")
+ *     suspend fun getAllUsers(): List<User>
+ * }
+ * ```
+ */
+@Suppress("NO_ACTUAL_FOR_EXPECT")
+expect annotation class Dao()
+
+/**
+ * Cross-platform annotation for defining SQL queries on DAO methods.
+ *
+ * This annotation is used to define raw SQL queries that will be executed
+ * when the annotated method is called. The query can contain parameters
+ * that correspond to method parameters.
+ *
+ * @param value The SQL query string to execute
+ *
+ * Example:
+ * ```kotlin
+ * @Query("SELECT * FROM users WHERE age > :minAge")
+ * suspend fun getUsersOlderThan(minAge: Int): List<User>
+ * ```
+ */
+@Suppress("NO_ACTUAL_FOR_EXPECT")
+@Target(AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY_GETTER)
+@Retention(AnnotationRetention.BINARY)
+expect annotation class Query(
+    val value: String,
+)
+
+/**
+ * Cross-platform annotation for marking DAO methods that insert entities into the database.
+ *
+ * This annotation defines how the method should behave when inserting entities.
+ * It can handle single entities, lists of entities, or arrays of entities.
+ *
+ * @param entity The entity class that this method inserts (used for type checking)
+ * @param onConflict Strategy to use when there's a conflict during insertion
+ *
+ * Example:
+ * ```kotlin
+ * @Insert(onConflict = OnConflictStrategy.REPLACE)
+ * suspend fun insertUser(user: User): Long
+ *
+ * @Insert(onConflict = OnConflictStrategy.IGNORE)
+ * suspend fun insertUsers(users: List<User>): List<Long>
+ * ```
+ */
+@Suppress("NO_ACTUAL_FOR_EXPECT")
+@Target(AnnotationTarget.FUNCTION)
+@Retention(AnnotationRetention.BINARY)
+expect annotation class Insert(
+    val entity: KClass<*>,
+    val onConflict: Int,
+)
+
+/**
+ * Cross-platform annotation for marking entity fields as primary keys.
+ *
+ * This annotation identifies which field(s) serve as the primary key for the entity.
+ * Primary keys uniquely identify each row in the database table.
+ *
+ * @param autoGenerate Whether the database should automatically generate values for this primary key
+ *
+ * Example:
+ * ```kotlin
+ * @Entity
+ * data class User(
+ *     @PrimaryKey(autoGenerate = true)
+ *     val id: Long = 0,
+ *     val name: String
+ * )
+ * ```
+ */
+@Suppress("NO_ACTUAL_FOR_EXPECT")
+@Target(AnnotationTarget.FIELD, AnnotationTarget.FUNCTION)
+@Retention(AnnotationRetention.BINARY)
+expect annotation class PrimaryKey(
+    val autoGenerate: Boolean,
+)
+
+/**
+ * Cross-platform annotation for defining foreign key constraints.
+ *
+ * This annotation is used within the @Entity annotation to define relationships
+ * between entities through foreign key constraints. It ensures referential integrity
+ * between related tables.
+ *
+ * Example:
+ * ```kotlin
+ * @Entity(
+ *     foreignKeys = [ForeignKey(
+ *         entity = User::class,
+ *         parentColumns = ["id"],
+ *         childColumns = ["userId"],
+ *         onDelete = ForeignKey.CASCADE
+ *     )]
+ * )
+ * data class Post(
+ *     @PrimaryKey val id: Long,
+ *     val userId: Long,
+ *     val content: String
+ * )
+ * ```
+ */
+@Suppress("NO_ACTUAL_FOR_EXPECT")
+@Target(allowedTargets = [])
+@Retention(AnnotationRetention.BINARY)
+expect annotation class ForeignKey
+
+/**
+ * Cross-platform annotation for defining database indexes.
+ *
+ * Indexes improve query performance by creating optimized data structures
+ * for faster data retrieval. This annotation is used within the @Entity
+ * annotation to define indexes on one or more columns.
+ *
+ * Example:
+ * ```kotlin
+ * @Entity(
+ *     indices = [
+ *         Index(value = ["email"], unique = true),
+ *         Index(value = ["firstName", "lastName"])
+ *     ]
+ * )
+ * data class User(
+ *     @PrimaryKey val id: Long,
+ *     val email: String,
+ *     val firstName: String,
+ *     val lastName: String
+ * )
+ * ```
+ */
+@Suppress("NO_ACTUAL_FOR_EXPECT")
+@Target(allowedTargets = [])
+@Retention(AnnotationRetention.BINARY)
+expect annotation class Index
+
+/**
+ * Cross-platform annotation for marking classes as database entities.
+ *
+ * This annotation transforms a Kotlin class into a database table.
+ * Each instance of the class represents a row in the table, and each
+ * property represents a column.
+ *
+ * @param tableName Custom name for the database table (defaults to class name)
+ * @param indices Array of indexes to create on this table
+ * @param inheritSuperIndices Whether to inherit indexes from parent classes
+ * @param primaryKeys Array of column names that form the composite primary key
+ * @param foreignKeys Array of foreign key constraints for this table
+ * @param ignoredColumns Array of property names to exclude from the table
+ *
+ * Example:
+ * ```kotlin
+ * @Entity(
+ *     tableName = "user_profiles",
+ *     indices = [Index(value = ["email"], unique = true)]
+ * )
+ * data class UserProfile(
+ *     @PrimaryKey(autoGenerate = true)
+ *     val id: Long = 0,
+ *     val email: String,
+ *     val displayName: String
+ * )
+ * ```
+ */
+@Suppress("NO_ACTUAL_FOR_EXPECT")
+@Target(AnnotationTarget.CLASS)
+@Retention(AnnotationRetention.BINARY)
+expect annotation class Entity(
+    val tableName: String,
+    val indices: Array<Index>,
+    val inheritSuperIndices: Boolean,
+    val primaryKeys: Array<String>,
+    val foreignKeys: Array<ForeignKey>,
+    val ignoredColumns: Array<String>,
+)
+
+/**
+ * Cross-platform constants for handling database conflicts during insert operations.
+ *
+ * These constants define the behavior when inserting data that conflicts with
+ * existing constraints (such as primary key or unique constraints).
+ *
+ * Example usage:
+ * ```kotlin
+ * @Insert(onConflict = OnConflictStrategy.REPLACE)
+ * suspend fun insertUser(user: User)
+ *
+ * @Insert(onConflict = OnConflictStrategy.IGNORE)
+ * suspend fun insertUserIfNotExists(user: User)
+ * ```
+ */
+object OnConflictStrategy {
+    /** No conflict resolution strategy specified (may cause exceptions) */
+    const val NONE = 0
+
+    /** Replace the existing data with the new data when conflicts occur */
+    const val REPLACE = 1
+
+    /** Rollback the transaction when conflicts occur */
+    const val ROLLBACK = 2
+
+    /** Abort the current operation when conflicts occur */
+    const val ABORT = 3
+
+    /** Fail the operation and throw an exception when conflicts occur */
+    const val FAIL = 4
+
+    /** Ignore the new data when conflicts occur (keep existing data) */
+    const val IGNORE = 5
+}

core-base/database/src/commonMain/kotlin/template/core/base/database/TypeConverter.kt

@@ -0,0 +1,60 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.database
+
+/**
+ * Cross-platform annotation for marking methods as database type converters.
+ *
+ * Type converters enable Room to store and retrieve complex data types that are not
+ * natively supported by SQLite. This annotation marks methods that convert between
+ * custom types and primitive types that SQLite can understand.
+ *
+ * Type converters must be static methods (or methods in an object class) and should
+ * come in pairs: one method to convert from the custom type to a primitive type,
+ * and another to convert back from the primitive type to the custom type.
+ *
+ * Example usage:
+ * ```kotlin
+ * object DateConverters {
+ *     @TypeConverter
+ *     fun fromTimestamp(value: Long?): Date? {
+ *         return value?.let { Date(it) }
+ *     }
+ *
+ *     @TypeConverter
+ *     fun dateToTimestamp(date: Date?): Long? {
+ *         return date?.time
+ *     }
+ * }
+ *
+ * // Register converters in your database
+ * @Database(...)
+ * @TypeConverters(DateConverters::class)
+ * abstract class MyDatabase : RoomDatabase() {
+ *     // Database implementation
+ * }
+ * ```
+ *
+ * Common use cases for type converters include:
+ * - Converting Date objects to Long timestamps
+ * - Converting enums to String or Int values
+ * - Converting complex objects to JSON strings
+ * - Converting lists or arrays to comma-separated strings
+ *
+ * Performance considerations:
+ * - Type converters are called frequently during database operations
+ * - Keep conversion logic simple and efficient
+ * - Consider caching expensive conversions when appropriate
+ * - Avoid complex object creation in frequently-called converters
+ */
+@Suppress("NO_ACTUAL_FOR_EXPECT")
+@Target(AnnotationTarget.FUNCTION)
+@Retention(AnnotationRetention.BINARY)
+expect annotation class TypeConverter()

core-base/database/src/desktopMain/kotlin/template/core/base/database/AppDatabaseFactory.kt

@@ -0,0 +1,123 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.database
+
+import androidx.room.Room
+import androidx.room.RoomDatabase
+import androidx.room.util.findAndInstantiateDatabaseImpl
+import java.io.File
+
+/**
+ * Desktop-specific implementation of the database factory for creating Room database instances.
+ *
+ * This factory class provides cross-platform desktop database creation capabilities,
+ * automatically selecting appropriate storage locations based on the operating system.
+ * The implementation ensures databases are stored in platform-conventional directories
+ * that provide appropriate persistence and user access patterns.
+ *
+ * Platform-specific storage locations:
+ * - Windows: %APPDATA%/MifosDatabase
+ * - macOS: ~/Library/Application Support/MifosDatabase
+ * - Linux: ~/.local/share/MifosDatabase
+ *
+ * Key features:
+ * - Automatic platform detection and directory selection
+ * - Cross-platform file system compatibility
+ * - Type-safe database creation using inline reified generics
+ * - Automatic directory creation when required
+ * - Integration with JVM-based Room implementations
+ *
+ * @see androidx.room.Room
+ * @see androidx.room.RoomDatabase
+ */
+class AppDatabaseFactory {
+
+    /**
+     * Creates a Room database builder configured for desktop environments.
+     *
+     * This method constructs a RoomDatabase.Builder instance specifically configured
+     * for desktop applications, with automatic platform-appropriate storage location
+     * selection. The method leverages inline reified generics to provide type safety
+     * while maintaining flexibility in database instantiation.
+     *
+     * The implementation automatically detects the current operating system and
+     * selects the conventional application data directory for that platform,
+     * ensuring databases are stored in locations that align with user expectations
+     * and system conventions.
+     *
+     * @param T The type of RoomDatabase to create, must extend RoomDatabase
+     * @param databaseName The name of the database file to create or access
+     * @param factory Optional factory function for database instantiation, defaults to Room's automatic discovery
+     * @return A RoomDatabase.Builder instance ready for additional configuration and building
+     *
+     * @throws SecurityException if the application lacks permission to create directories or files
+     * @throws IOException if there are file system issues during directory or database creation
+     * @throws ClassNotFoundException if the database implementation class cannot be located
+     *
+     * Directory creation behavior:
+     * - Automatically creates the MifosDatabase directory if it does not exist
+     * - Respects existing directory permissions and structure
+     * - Uses platform-appropriate path separators and naming conventions
+     *
+     * Example usage:
+     * ```kotlin
+     * class DesktopApplication {
+     *     private val databaseFactory = AppDatabaseFactory()
+     *
+     *     val transactionDatabase: TransactionDatabase by lazy {
+     *         databaseFactory
+     *             .createDatabase<TransactionDatabase>("transactions.db")
+     *             .addMigrations(MIGRATION_1_2)
+     *             .enableMultiInstanceInvalidation()
+     *             .build()
+     *     }
+     *
+     *     val userDatabase: UserDatabase by lazy {
+     *         databaseFactory
+     *             .createDatabase<UserDatabase>("users.db") {
+     *                 // Custom factory implementation if needed
+     *                 UserDatabase_Impl()
+     *             }
+     *             .addTypeConverter(CustomConverters())
+     *             .build()
+     *     }
+     * }
+     * ```
+     *
+     * Platform considerations:
+     * - Windows installations should ensure %APPDATA% is accessible
+     * - macOS applications may require appropriate entitlements for file system access
+     * - Linux environments should verify user home directory permissions
+     * - Consider backup and synchronization implications of chosen storage locations
+     */
+    inline fun <reified T : RoomDatabase> createDatabase(
+        databaseName: String,
+        noinline factory: () -> T = { findAndInstantiateDatabaseImpl(T::class.java) },
+    ): RoomDatabase.Builder<T> {
+        val os = System.getProperty("os.name").lowercase()
+        val userHome = System.getProperty("user.home")
+        val appDataDir = when {
+            os.contains("win") -> File(System.getenv("APPDATA"), "MifosDatabase")
+            os.contains("mac") -> File(userHome, "Library/Application Support/MifosDatabase")
+            else -> File(userHome, ".local/share/MifosDatabase")
+        }
+
+        if (!appDataDir.exists()) {
+            appDataDir.mkdirs()
+        }
+
+        val dbFile = File(appDataDir, databaseName)
+
+        return Room.databaseBuilder(
+            name = dbFile.absolutePath,
+            factory = factory,
+        )
+    }
+}

core-base/database/src/nativeMain/kotlin/template/core/base/database/AppDatabaseFactory.kt

@@ -0,0 +1,160 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.database
+
+import androidx.room.Room
+import androidx.room.RoomDatabase
+import androidx.room.util.findDatabaseConstructorAndInitDatabaseImpl
+import kotlinx.cinterop.ExperimentalForeignApi
+import platform.Foundation.NSDocumentDirectory
+import platform.Foundation.NSFileManager
+import platform.Foundation.NSUserDomainMask
+
+/**
+ * Native platform implementation of the database factory for iOS and macOS applications.
+ *
+ * This factory class provides database creation capabilities specifically designed for
+ * iOS and macOS platforms using Kotlin/Native interoperability with Foundation framework APIs.
+ * The implementation ensures databases are stored in the standard document directory,
+ * providing appropriate persistence characteristics and compliance with platform guidelines.
+ *
+ * Platform integration features:
+ * - Direct integration with iOS/macOS Foundation framework
+ * - Standard document directory storage following Apple guidelines
+ * - Type-safe database creation using inline reified generics
+ * - Kotlin/Native C interop for optimal platform performance
+ * - Compliance with iOS app sandbox requirements
+ *
+ * Storage characteristics:
+ * - Databases stored in application's document directory
+ * - Automatic backup eligibility through iTunes/iCloud (configurable)
+ * - Persistent across application updates and device restores
+ * - Accessible through Files app on iOS (when appropriate)
+ *
+ * @see androidx.room.Room
+ * @see androidx.room.RoomDatabase
+ * @see platform.Foundation.NSFileManager
+ */
+class AppDatabaseFactory {
+
+    /**
+     * Creates a Room database builder configured for iOS/macOS native environments.
+     *
+     * This method constructs a RoomDatabase.Builder instance specifically optimized
+     * for native iOS and macOS applications. The implementation leverages Foundation
+     * framework APIs through Kotlin/Native interop to ensure proper platform integration
+     * and adherence to Apple's storage guidelines.
+     *
+     * The database file is automatically placed in the application's document directory,
+     * which provides appropriate persistence characteristics and follows Apple's
+     * recommended storage patterns for user-generated content and application data.
+     *
+     * @param T The type of RoomDatabase to create, must extend RoomDatabase
+     * @param databaseName The name of the database file to create within the document directory
+     * @param factory Optional factory function for database instantiation, defaults to Room's constructor discovery
+     * @return A RoomDatabase.Builder instance ready for additional configuration and building
+     *
+     * @throws NSException if document directory access fails or is unavailable
+     * @throws RuntimeException if the database constructor cannot be located or instantiated
+     * @throws SecurityException if the application lacks required file system permissions
+     *
+     * Platform considerations:
+     * - Database files are eligible for iCloud backup by default
+     * - Files may be accessible through the Files app depending on configuration
+     * - Storage location complies with App Store Review Guidelines
+     * - Automatic cleanup may occur during low storage conditions
+     *
+     * Example usage:
+     * ```kotlin
+     * class IOSApp {
+     *     private val databaseFactory = AppDatabaseFactory()
+     *
+     *     val coreDatabase: CoreDatabase by lazy {
+     *         databaseFactory
+     *             .createDatabase<CoreDatabase>("core_data.db")
+     *             .addMigrations(MIGRATION_VERSIONS)
+     *             .setJournalMode(RoomDatabase.JournalMode.WAL)
+     *             .build()
+     *     }
+     *
+     *     val cacheDatabase: CacheDatabase by lazy {
+     *         databaseFactory
+     *             .createDatabase<CacheDatabase>("cache.db") {
+     *                 CacheDatabase_Impl()
+     *             }
+     *             .addCallback(object : RoomDatabase.Callback() {
+     *                 override fun onCreate(db: SupportSQLiteDatabase) {
+     *                     // Initialize cache tables
+     *                 }
+     *             })
+     *             .build()
+     *     }
+     * }
+     * ```
+     *
+     * Configuration recommendations:
+     * - Consider WAL mode for improved concurrent access performance
+     * - Implement proper migration strategies for iOS app updates
+     * - Configure backup exclusion for cache or temporary databases
+     * - Monitor storage usage in compliance with platform guidelines
+     */
+    inline fun <reified T : RoomDatabase> createDatabase(
+        databaseName: String,
+        noinline factory: () -> T = { findDatabaseConstructorAndInitDatabaseImpl(T::class) },
+    ): RoomDatabase.Builder<T> {
+        val dbFilePath = documentDirectory() + "/$databaseName"
+        return Room.databaseBuilder(
+            name = dbFilePath,
+            factory = factory,
+        )
+    }
+
+    /**
+     * Retrieves the path to the application's document directory using Foundation framework APIs.
+     *
+     * This method provides access to the standard iOS/macOS document directory through
+     * Kotlin/Native interop with the Foundation framework. The document directory serves
+     * as the primary location for storing user-generated content and application data
+     * that should persist across application launches and system updates.
+     *
+     * The implementation uses NSFileManager to locate the document directory within
+     * the user domain, ensuring proper sandboxing compliance and platform integration.
+     * This approach guarantees that database files are stored in locations that align
+     * with Apple's storage guidelines and user expectations.
+     *
+     * @return The absolute file system path to the application's document directory
+     *
+     * @throws RuntimeException if the document directory cannot be located or accessed
+     * @throws NSException if Foundation framework calls fail due to system restrictions
+     *
+     * Directory characteristics:
+     * - Persistent across application updates and device restores
+     * - Included in iTunes and iCloud backups by default
+     * - Accessible through document provider extensions when configured
+     * - Subject to iOS storage management and optimization
+     *
+     * Implementation notes:
+     * - Uses NSUserDomainMask to ensure user-specific directory access
+     * - Leverages NSDocumentDirectory constant for standard directory location
+     * - Employs Kotlin/Native C interop for optimal performance and integration
+     * - Handles potential nil responses from Foundation framework appropriately
+     */
+    @OptIn(ExperimentalForeignApi::class)
+    fun documentDirectory(): String {
+        val documentDirectory = NSFileManager.defaultManager.URLForDirectory(
+            directory = NSDocumentDirectory,
+            inDomain = NSUserDomainMask,
+            appropriateForURL = null,
+            create = false,
+            error = null,
+        )
+        return requireNotNull(documentDirectory?.path)
+    }
+}

core-base/database/src/nonJsCommonMain/kotlin/template/core/base/database/Room.nonJsCommon.kt

@@ -0,0 +1,71 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.database
+
+import androidx.room.Dao
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Index
+import androidx.room.Insert
+import androidx.room.PrimaryKey
+import androidx.room.Query
+
+/**
+ * Multiplatform typealiases for Room database annotations and interfaces.
+ *
+ * This file provides `actual` typealiases for common Room annotations and interfaces, allowing
+ * shared code to use Room database features in a platform-agnostic way. These typealiases map
+ * to the corresponding Android Room components, enabling code sharing across platforms in a
+ * Kotlin Multiplatform project.
+ *
+ * @see <a href="https://developer.android.com/training/data-storage/room">Room Persistence Library</a>
+ */
+
+/**
+ * Typealias for the Room `@Dao` annotation/interface.
+ * Used to mark Data Access Objects in shared code.
+ */
+actual typealias Dao = Dao
+
+/**
+ * Typealias for the Room `@Query` annotation.
+ * Used to annotate methods in DAOs for SQL queries.
+ */
+actual typealias Query = Query
+
+/**
+ * Typealias for the Room `@Insert` annotation.
+ * Used to annotate methods in DAOs for insert operations.
+ */
+actual typealias Insert = Insert
+
+/**
+ * Typealias for the Room `@PrimaryKey` annotation.
+ * Used to mark primary key fields in entities.
+ */
+actual typealias PrimaryKey = PrimaryKey
+
+/**
+ * Typealias for the Room `@ForeignKey` annotation.
+ * Used to define foreign key relationships in entities.
+ */
+actual typealias ForeignKey = ForeignKey
+
+/**
+ * Typealias for the Room `@Index` annotation.
+ * Used to define indices on entity fields.
+ */
+actual typealias Index = Index
+
+/**
+ * Typealias for the Room `@Entity` annotation.
+ * Used to mark classes as database entities.
+ */
+actual typealias Entity = Entity

core-base/database/src/nonJsCommonMain/kotlin/template/core/base/database/TypeConverter.nonJsCommon.kt

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.database
+
+import androidx.room.TypeConverter
+
+/**
+ * Type alias for Room's [TypeConverter] annotation in non-JS common code.
+ *
+ * This type alias maps the Room [TypeConverter] annotation to be used in the non-JS common module.
+ * The [TypeConverter] annotation is used to define custom type conversions for Room database entities.
+ *
+ * @see androidx.room.TypeConverter
+ */
+actual typealias TypeConverter = TypeConverter

core-base/datastore/README.md

@@ -0,0 +1,282 @@
+# Core Datastore Module [Deprecated]
+
+> \[!Important]
+> This module serves as a demonstration of Architecture & SOLID Pattern principles with comprehensive unit testing. The
+> settings library already provides the same functionality, and under the hood it'd use that library, consider directly
+> using that and this will be removed soon from this project.
+
+A robust, type-safe, and reactive data storage solution for Kotlin Multiplatform projects, built on
+top of [Multiplatform Settings](https://github.com/russhwolf/multiplatform-settings). This module
+provides a flexible API for managing persistent data with support for caching, validation, and
+reactive observation using Kotlin Flows.
+
+## Features
+
+- Type-safe data storage for primitive and serializable types
+- In-memory caching with LRU implementation for performance
+- Data validation for keys and values
+- JSON serialization/deserialization using `kotlinx.serialization`
+- Reactive data observation using Kotlin Coroutines Flow
+- Dedicated support for user preferences management
+- Comprehensive exception handling
+- Flexible instance creation and dependency management via a Factory
+
+## Architecture
+
+The `core-base/datastore` module is designed with a layered and component-based architecture to
+ensure modularity, testability, and flexibility. It separates concerns into distinct layers and
+components, allowing for customization and easier maintenance.
+
+**Core Layers:**
+
+1. **Contracts:** Defines the fundamental interfaces that outline the capabilities of different data
+   store implementations. This layer provides abstractions for basic storage operations, key-value
+   storage, caching, and reactive observation.
+2. **Stores:** Contains the concrete implementations of the data storage logic. These classes
+   interact with the underlying `Multiplatform Settings` library and integrate supporting components
+   like caching, serialization, and validation.
+3. **Repositories:** Offers a higher-level, more use-case oriented API built on top of the data
+   stores. The reactive repository provides convenient methods for common preference management
+   tasks and reactive observation.
+
+**Supporting Components:**
+
+- **Factory:** The `DataStoreFactory` provides a builder pattern for creating and configuring
+  instances of the reactive data store and repository. It simplifies the process of assembling the
+  various components with desired settings, dispatchers, cache configurations, validators, and
+  serialization strategies.
+- **Serialization:** Defines strategies for converting complex data objects to and from storable
+  formats, primarily using `kotlinx.serialization` for JSON.
+- **Validation:** Implements rules for validating keys and values before they are stored, ensuring
+  data integrity.
+- **Cache:** Provides an optional in-memory caching layer (`LRUCacheManager`) to improve read
+  performance for frequently accessed data.
+- **Reactive:** Includes components (`ChangeNotifier`, `ValueObserver`) that enable the reactive
+  capabilities of the data store, allowing observers to react to data changes via Kotlin Flows.
+- **Type Handling:** Manages the specific logic required to store and retrieve different primitive
+  data types using the underlying settings mechanism.
+- **Exceptions:** Defines custom exception classes for specific error conditions within the module.
+
+**Architecture Flow:**
+
+The typical interaction flow involves the **Repository** layer calling methods on the **Store**
+layer. The **Store** layer then utilizes **Serialization**, **Validation**, **Type Handling**, and *
+*Cache** components as needed before interacting with the underlying **Settings** implementation. *
+*Reactive** components are integrated within the **Store** layer to provide Flow-based observation.
+The **Factory** is responsible for assembling and configuring these components.
+
+**Diagram:**
+
+```mermaid
+graph TD
+    A[User/Application Code] --> B[DataStoreFactory]
+    B --> C[ReactivePreferencesRepository]
+    C --> D[ReactiveDataStore]
+    D --> E[CachedPreferencesStore]
+    E --> F[Settings-Multiplatform Settings]
+    E --> G[CacheManager]
+    E --> H[SerializationStrategy]
+    E --> I[PreferencesValidator]
+    E --> J[TypeHandler]
+    D --> K[ChangeNotifier]
+    D --> L[ValueObserver]
+
+    subgraph Layers
+        C:::repository
+        D:::store
+        E:::store
+    end
+
+    subgraph Supporting Components
+        B:::factory
+        G:::cache
+        H:::serialization
+        I:::validation
+        J:::typehandler
+        K:::reactive
+        L:::reactive
+    end
+
+    subgraph Underlying Technology
+        F:::settings
+    end
+
+    classDef repository fill: #f9f, stroke: #333, stroke-width: 2;
+    classDef store fill: #ccf, stroke: #333, stroke-width: 2;
+    classDef factory fill: #cfc, stroke: #333, stroke-width: 2;
+    classDef cache fill: #ffc, stroke: #333, stroke-width: 2;
+    classDef serialization fill: #fcf, stroke: #333, stroke-width: 2;
+    classDef validation fill: #cff, stroke: #333, stroke-width: 2;
+    classDef typehandler fill: #cc9, stroke: #333, stroke-width: 2;
+    classDef reactive fill: #9cf, stroke: #333, stroke-width: 2;
+    classDef settings fill: #f99, stroke: #333, stroke-width: 2;
+
+```
+
+## Usage
+
+### Basic Usage
+
+This section demonstrates how to use the basic `DataStore` for a custom type.
+
+```kotlin
+// Define your data class with serialization annotation
+@Serializable
+data class UserData(val name: String, val age: Int)
+
+// Create serializer and validator instances
+// Using JsonSerializationStrategy requires a KSerializer for your data type
+val serializer = JsonSerializationStrategy(UserData.serializer())
+// Use DefaultDataStoreValidator if no specific validation is needed
+val validator = DefaultDataStoreValidator<UserData>()
+
+// Obtain DataStore instance from a factory (assuming a DataStoreFactory is provided via DI or elsewhere)
+// The factory is responsible for creating instances based on the desired configuration
+val dataStore: DataStore<UserData> = dataStoreFactory.createDataStore(serializer, validator)
+
+// Store data asynchronously
+dataStore.setData(UserData("John", 30))
+
+// Get data as a Coroutines Flow. The flow emits the current data and subsequent changes.
+dataStore.getData().collect { userData ->
+    println("User: ${userData.name}, Age: ${userData.age}")
+}
+
+// To get a snapshot of the current data without observing future changes, you might use:
+// val currentUserData = dataStore.getData().first() // Requires importing kotlinx.coroutines.flow.first
+```
+
+### Using Typed DataStore
+
+`TypedDataStore` is suitable for scenarios where you need to store multiple pieces of data of the
+same type, identified by a key.
+
+```kotlin
+// Assuming UserData, serializer, and validator are defined as above
+
+// Create a typed data store. The second type parameter defines the type of the key.
+val typedDataStore: TypedDataStore<UserData, String> =
+    dataStoreFactory.createTypedDataStore<UserData, String>(
+        serializer,
+        validator
+    )
+
+// Store data with a specific key
+typedDataStore.setDataForKey("user1", UserData("John", 30))
+typedDataStore.setDataForKey("user2", UserData("Jane", 25))
+
+// Get data by key as a Flow
+typedDataStore.getDataForKey("user1").collect { userData ->
+    // userData will be null if no data is stored for this key
+    println("User for key user1: ${userData?.name}, Age: ${userData?.age}")
+}
+
+// To get a snapshot for a specific key:
+// val user1Snapshot = typedDataStore.getDataForKey("user1").first()
+```
+
+### Using Cacheable DataStore
+
+`CacheableDataStore` adds an in-memory caching layer to a `TypedDataStore`, improving read
+performance for frequently accessed data.
+
+```kotlin
+// Assuming UserData, serializer, and validator are defined as above
+
+// Create a CacheManager. LRUCacheManager is a common choice.
+// The cache stores data in memory, mapping keys to data objects.
+val cacheManager = LRUCacheManager<String, UserData>()
+
+// Create a cacheable data store, combining TypedDataStore functionality with caching.
+val cacheableDataStore: CacheableDataStore<UserData, String> =
+    dataStoreFactory.createCacheableDataStore(
+        serializer,
+        validator,
+        cacheManager
+    )
+
+// Store and cache data. Storing data through CacheableDataStore will also update the cache.
+cacheableDataStore.setDataForKey("user1", UserData("John", 30))
+
+// Get data, potentially served from the cache if available and not invalidated.
+cacheableDataStore.getCachedData("user1").collect { userData ->
+    println("User from cacheable store (key user1): ${userData?.name}, Age: ${userData?.age}")
+}
+
+// Note: The underlying storage is still used to persist data. The cache is an optimization layer.
+// Cache invalidation strategies or manual cache management might be needed for complex scenarios.
+```
+
+### Using User Preferences
+
+The `UserPreferencesRepository` provides a simple key-value store for basic user settings, typically
+backed by Multiplatform Settings.
+
+```kotlin
+// Obtain UserPreferencesRepository instance, usually through Dependency Injection
+// Assuming 'get<UserPreferencesRepository>()' is available in your context (e.g., Koin)
+val userPreferences: UserPreferencesRepository = get<UserPreferencesRepository>()
+
+// Store preferences for various primitive types
+userPreferences.setString("theme", "dark")
+userPreferences.setBoolean("notifications", true)
+userPreferences.setInt("fontSize", 14)
+// ... other primitive types supported by Multiplatform Settings
+
+// Get preferences as Flows
+userPreferences.getString("theme", defaultValue = "light").collect { theme ->
+    println("Current theme: $theme")
+}
+
+userPreferences.getBoolean("notifications", defaultValue = false).collect { enabled ->
+    println("Notifications enabled: $enabled")
+}
+
+// Note: Use appropriate default values when retrieving preferences to handle cases where a preference is not set.
+```
+
+## Guidelines
+
+- **Choosing the Right DataStore:**
+    - Use `DataStore` for storing a single instance of a complex data object (e.g., user profile
+      data).
+    - Use `TypedDataStore` for storing multiple instances of a data object, addressable by a unique
+      key (e.g., cached API responses, individual settings for different features).
+    - Use `CacheableDataStore` when you need the functionality of `TypedDataStore` and want to add
+      an in-memory caching layer for performance.
+    - Use `UserPreferencesRepository` for simple key-value storage of primitive types, suitable for
+      user settings and flags.
+
+- **Key Naming:** When using `TypedDataStore` or `UserPreferencesRepository`, use clear and
+  consistent key names, perhaps following a convention like `featureName_dataType_identifier`.
+
+- **Serialization:** Always use `@Serializable` annotation from `kotlinx.serialization` for data
+  classes stored using `DataStore`, `TypedDataStore`, or `CacheableDataStore`. Ensure you have the
+  necessary serializer instances.
+
+- **Validation:** Implement `DataStoreValidator` if your data requires specific validation rules
+  before storage or after retrieval.
+
+- **Error Handling:** The DataStore operations typically use Kotlin Result or throw exceptions for
+  failures during serialization, deserialization, or storage. Implement appropriate error handling
+  in your data flows or suspending functions.
+
+- **Schema Evolution:** The current module does not include built-in support for schema migrations.
+  If your data structure changes in future versions of your application, you will need to handle
+  data migration manually, for example, by checking a version flag in your preferences or
+  implementing a migration logic during app startup.
+
+- **Dependency Injection:** It is recommended to obtain instances of `DataStoreFactory` and
+  `UserPreferencesRepository` through dependency injection (e.g., using Koin) rather than creating
+  them directly in your application code. This promotes testability and modularity.
+
+## Testing
+
+The module includes comprehensive test cases for all components. Run the tests using:
+
+```bash
+./gradlew :core-base:datastore:test
+```
+
+Ensure you write tests for your specific DataStore implementations and validators when using this
+module.

core-base/datastore/build.gradle.kts

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+plugins {
+    alias(libs.plugins.mifos.kmp.library)
+    id("kotlinx-serialization")
+}
+
+android {
+    namespace = "template.core.base.datastore"
+}
+
+kotlin {
+    sourceSets {
+        commonMain.dependencies {
+            implementation(libs.multiplatform.settings)
+            implementation(libs.multiplatform.settings.serialization)
+            implementation(libs.multiplatform.settings.coroutines)
+            implementation(libs.kotlinx.coroutines.core)
+            implementation(libs.kotlinx.serialization.json)
+            implementation(libs.kotlinx.datetime)
+        }
+
+        commonTest.dependencies {
+            implementation(libs.multiplatform.settings.test)
+            implementation(libs.kotlinx.coroutines.test)
+            implementation(libs.turbine)
+        }
+    }
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/cache/CacheManager.kt

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.cache
+
+/**
+ * Interface for managing in-memory caching of key-value pairs in the data store.
+ *
+ * Implementations of this interface provide methods for storing, retrieving, removing,
+ * and clearing cached entries, as well as checking cache size and key existence.
+ *
+ * Example usage:
+ * ```kotlin
+ * val cache: CacheManager<String, Any> = LruCacheManager(100)
+ * cache.put("theme", "dark")
+ * val value = cache.get("theme")
+ * cache.remove("theme")
+ * cache.clear()
+ * val size = cache.size()
+ * val exists = cache.containsKey("theme")
+ * ```
+ *
+ * @param K The type of the cache key.
+ * @param V The type of the cached value.
+ */
+interface CacheManager<K, V> {
+    /**
+     * Stores a value in the cache associated with the specified key.
+     *
+     * @param key The key to associate with the value.
+     * @param value The value to store.
+     */
+    fun put(key: K, value: V)
+
+    /**
+     * Retrieves a value from the cache associated with the specified key.
+     *
+     * @param key The key to retrieve.
+     * @return The cached value, or `null` if not present.
+     */
+    fun get(key: K): V?
+
+    /**
+     * Removes the value associated with the specified key from the cache.
+     *
+     * @param key The key to remove.
+     * @return The removed value, or `null` if not present.
+     */
+    fun remove(key: K): V?
+
+    /**
+     * Clears all entries from the cache.
+     */
+    fun clear()
+
+    /**
+     * Returns the number of entries currently stored in the cache.
+     *
+     * @return The cache size.
+     */
+    fun size(): Int
+
+    /**
+     * Checks whether the cache contains the specified key.
+     *
+     * @param key The key to check.
+     * @return `true` if the cache contains the key, `false` otherwise.
+     */
+    fun containsKey(key: K): Boolean
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/cache/LruCacheManager.kt

@@ -0,0 +1,132 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.cache
+
+import template.core.base.datastore.exceptions.CacheException
+
+/**
+ * Least Recently Used (LRU) cache implementation for managing in-memory key-value pairs.
+ *
+ * This cache automatically evicts the least recently used entry when the maximum size is exceeded.
+ * It provides thread-unsafe, fast access for use cases where cache contention is not a concern.
+ *
+ * Example usage:
+ * ```kotlin
+ * val cache = LruCacheManager<String, Any>(maxSize = 100)
+ * cache.put("theme", "dark")
+ * val value = cache.get("theme")
+ * cache.remove("theme")
+ * cache.clear()
+ * val size = cache.size()
+ * val exists = cache.containsKey("theme")
+ * ```
+ *
+ * @param K The type of the cache key.
+ * @param V The type of the cached value.
+ * @property maxSize The maximum number of entries the cache can hold.
+ */
+class LruCacheManager<K, V>(
+    private val maxSize: Int = 100,
+) : CacheManager<K, V> {
+
+    private val cache = LinkedHashMap<K, V>(maxSize, 0.75f)
+
+    /**
+     * Adds or updates a value in the cache for the specified key.
+     * If the cache exceeds its maximum size, the least recently used entry is evicted.
+     *
+     * @param key The key to associate with the value.
+     * @param value The value to store in the cache.
+     * @throws CacheException if the operation fails.
+     */
+    override fun put(key: K, value: V) {
+        try {
+            cache[key] = value
+            if (cache.size > maxSize) {
+                val eldest = cache.keys.first()
+                cache.remove(eldest)
+            }
+        } catch (e: Exception) {
+            throw CacheException("Failed to put value in cache for key: $key", e)
+        }
+    }
+
+    /**
+     * Retrieves the value associated with the specified key from the cache.
+     *
+     * @param key The key to look up.
+     * @return The value associated with the key, or null if the key is not present.
+     * @throws CacheException if the operation fails.
+     */
+    override fun get(key: K): V? {
+        return try {
+            cache[key]
+        } catch (e: Exception) {
+            throw CacheException("Failed to get value from cache for key: $key", e)
+        }
+    }
+
+    /**
+     * Removes the value associated with the specified key from the cache.
+     *
+     * @param key The key to remove.
+     * @return The value that was associated with the key, or null if the key was not present.
+     * @throws CacheException if the operation fails.
+     */
+    override fun remove(key: K): V? {
+        return try {
+            cache.remove(key)
+        } catch (e: Exception) {
+            throw CacheException("Failed to remove value from cache for key: $key", e)
+        }
+    }
+
+    /**
+     * Removes all entries from the cache.
+     *
+     * @throws CacheException if the operation fails.
+     */
+    override fun clear() {
+        try {
+            cache.clear()
+        } catch (e: Exception) {
+            throw CacheException("Failed to clear cache", e)
+        }
+    }
+
+    /**
+     * Returns the current number of entries in the cache.
+     *
+     * @return The number of key-value pairs currently stored in the cache.
+     * @throws CacheException if the operation fails.
+     */
+    override fun size(): Int {
+        return try {
+            cache.size
+        } catch (e: Exception) {
+            throw CacheException("Failed to get cache size", e)
+        }
+    }
+
+    /**
+     * Checks if the cache contains an entry for the specified key.
+     *
+     * @param key The key to check.
+     * @return true if the cache contains an entry for the key, false otherwise.
+     * @throws CacheException if the operation fails.
+     */
+    override fun containsKey(key: K): Boolean {
+        return try {
+            cache.containsKey(key)
+        } catch (e: Exception) {
+            throw CacheException("Failed to check if cache contains key: $key", e)
+        }
+    }
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/contracts/CacheableDataStore.kt

@@ -0,0 +1,98 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.contracts
+
+/**
+ * Interface for data storage implementations that support caching.
+ *
+ * This interface extends the base [DataStore] interface, adding operations for managing
+ * an in-memory cache associated with the stored data.
+ *
+ * Example usage:
+ * ```kotlin
+ * val cacheableDataStore: CacheableDataStore = ...
+ * cacheableDataStore.putValue("settings_cache", "enabled")
+ * val value = cacheableDataStore.getValue("settings_cache", "disabled")
+ * cacheableDataStore.invalidateCache("settings_cache")
+ * ```
+ */
+interface CacheableDataStore : DataStore {
+    /**
+     * Stores a value associated with the specified key in the data store and updates the cache.
+     *
+     * @param key The key to associate with the value.
+     * @param value The value to store.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     */
+    suspend fun <T> putValue(key: String, value: T): Result<Unit>
+
+    /**
+     * Retrieves a value associated with the specified key, checking the cache first.
+     *
+     * @param key The key to retrieve.
+     * @param default The default value to return if the key does not exist in the data store.
+     * @return [Result.success] with the value, or [Result.failure] if an error occurs.
+     */
+    suspend fun <T> getValue(key: String, default: T): Result<T>
+
+    /**
+     * Stores a serializable value using the provided serializer and updates the cache.
+     *
+     * @param key The key to associate with the value.
+     * @param value The value to store.
+     * @param serializer The serializer for the value type.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     */
+    suspend fun <T> putSerializableValue(
+        key: String,
+        value: T,
+        serializer: kotlinx.serialization.KSerializer<T>,
+    ): Result<Unit>
+
+    /**
+     * Retrieves a serializable value using the provided serializer, checking the cache first.
+     *
+     * @param key The key to retrieve.
+     * @param default The default value to return if the key does not exist in the data store.
+     * @param serializer The serializer for the value type.
+     * @return [Result.success] with the value, or [Result.failure] if an error occurs.
+     */
+    suspend fun <T> getSerializableValue(
+        key: String,
+        default: T,
+        serializer: kotlinx.serialization.KSerializer<T>,
+    ): Result<T>
+
+    /**
+     * Invalidates the cache entry for the specified key.
+     *
+     * This forces the next retrieval for this key to read from the underlying data store.
+     *
+     * @param key The key whose cache entry should be invalidated.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     */
+    suspend fun invalidateCache(key: String): Result<Unit>
+
+    /**
+     * Invalidates all entries in the cache.
+     *
+     * This forces the next retrieval for any key to read from the underlying data store.
+     *
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     */
+    suspend fun invalidateAllCache(): Result<Unit>
+
+    /**
+     * Returns the current number of entries in the cache.
+     *
+     * @return The size of the cache.
+     */
+    fun getCacheSize(): Int
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/contracts/DataStore.kt

@@ -0,0 +1,64 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.contracts
+
+/**
+ * Base interface defining fundamental data storage operations.
+ *
+ * Implementations provide methods for checking key existence, removing values,
+ * clearing the store, and retrieving keys and size.
+ *
+ * Example usage:
+ * ```kotlin
+ * val dataStore: DataStore = ...
+ * dataStore.hasKey("config")
+ * dataStore.removeValue("temp_data")
+ * dataStore.getAllKeys()
+ * ```
+ */
+interface DataStore {
+    /**
+     * Checks if the specified key exists in the data store.
+     *
+     * @param key The key to check.
+     * @return [Result.success] with `true` if the key exists, `false` otherwise,
+     * or [Result.failure] if an error occurs.
+     */
+    suspend fun hasKey(key: String): Result<Boolean>
+
+    /**
+     * Removes the value associated with the specified key from the data store.
+     *
+     * @param key The key to remove.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     */
+    suspend fun removeValue(key: String): Result<Unit>
+
+    /**
+     * Clears all stored data from the data store.
+     *
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     */
+    suspend fun clearAll(): Result<Unit>
+
+    /**
+     * Retrieves a set of all keys currently stored in the data store.
+     *
+     * @return [Result.success] with the set of keys, or [Result.failure] if an error occurs.
+     */
+    suspend fun getAllKeys(): Result<Set<String>>
+
+    /**
+     * Retrieves the total number of key-value pairs stored in the data store.
+     *
+     * @return [Result.success] with the count, or [Result.failure] if an error occurs.
+     */
+    suspend fun getSize(): Result<Int>
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/contracts/DataStoreChangeEvent.kt

@@ -0,0 +1,96 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.contracts
+
+import kotlin.time.Clock
+import kotlin.time.ExperimentalTime
+
+/**
+ * Represents a change event that occurs in the data store.
+ *
+ * This sealed class defines different types of events, such as value additions, updates,
+ * removals, and the clearing of the entire store.
+ *
+ * Example usage:
+ * ```kotlin
+ * dataStore.observeChanges().collect { event ->
+ *     when (event) {
+ *         is DataStoreChangeEvent.ValueAdded -> println("Value added for key ${event.key}")
+ *         is DataStoreChangeEvent.ValueUpdated -> println("Value for key ${event.key} updated")
+ *         is DataStoreChangeEvent.ValueRemoved -> println("Value for key ${event.key} removed")
+ *         is DataStoreChangeEvent.StoreCleared -> println("Data store cleared")
+ *     }
+ * }
+ * ```
+ */
+@OptIn(ExperimentalTime::class)
+sealed class DataStoreChangeEvent {
+    /**
+     * The key associated with the change event. For [StoreCleared], this is typically "*".
+     */
+    abstract val key: String
+
+    /**
+     * The timestamp (in milliseconds since the epoch) when the event occurred.
+     */
+    abstract val timestamp: Long
+
+    data class ValueAdded constructor(
+        /**
+         * Represents the addition of a new value to the data store.
+         *
+         * @property key The key of the added value.
+         * @property value The value that was added.
+         * @property timestamp The timestamp of the event.
+         */
+        override val key: String,
+        val value: Any?,
+        override val timestamp: Long = Clock.System.now().toEpochMilliseconds(),
+    ) : DataStoreChangeEvent()
+
+    data class ValueUpdated(
+        /**
+         * Represents the update of an existing value in the data store.
+         *
+         * @property key The key of the updated value.
+         * @property oldValue The previous value before the update.
+         * @property newValue The new value after the update.
+         * @property timestamp The timestamp of the event.
+         */
+        override val key: String,
+        val oldValue: Any?,
+        val newValue: Any?,
+        override val timestamp: Long = Clock.System.now().toEpochMilliseconds(),
+    ) : DataStoreChangeEvent()
+
+    data class ValueRemoved(
+        /**
+         * Represents the removal of a value from the data store.
+         *
+         * @property key The key of the removed value.
+         * @property oldValue The value that was removed.
+         * @property timestamp The timestamp of the event.
+         */
+        override val key: String,
+        val oldValue: Any?,
+        override val timestamp: Long = Clock.System.now().toEpochMilliseconds(),
+    ) : DataStoreChangeEvent()
+
+    data class StoreCleared(
+        /**
+         * Represents the clearing of the entire data store.
+         *
+         * @property key The key is typically "*" for store cleared events.
+         * @property timestamp The timestamp of the event.
+         */
+        override val key: String = "*",
+        override val timestamp: Long = Clock.System.now().toEpochMilliseconds(),
+    ) : DataStoreChangeEvent()
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/contracts/ReactiveDataStore.kt

@@ -0,0 +1,81 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.contracts
+
+import kotlinx.coroutines.flow.Flow
+import kotlinx.serialization.KSerializer
+
+/**
+ * A reactive interface for observing changes in a data store.
+ *
+ * This interface extends [CacheableDataStore] and provides methods to observe changes in the data store
+ * using Kotlin Flow. It enables reactive programming patterns by emitting updates whenever the underlying
+ * data changes.
+ *
+ * Example usage:
+ * ```kotlin
+ * // Observe a simple value
+ * dataStore.observeValue("theme", "light")
+ *     .collect { theme -> println("Theme changed to: $theme") }
+ *
+ * // Observe a serializable value
+ * dataStore.observeSerializableValue("user", defaultUser, User.serializer())
+ *     .collect { user -> println("User updated: $user") }
+ *
+ * // Observe all keys
+ * dataStore.observeKeys()
+ *     .collect { keys -> println("Available keys: $keys") }
+ * ```
+ */
+interface ReactiveDataStore : CacheableDataStore {
+    /**
+     * Observes changes to a value associated with the specified key.
+     *
+     * @param key The key to observe.
+     * @param default The default value to emit if the key does not exist.
+     * @return A [Flow] that emits the current value and subsequent updates.
+     */
+    fun <T> observeValue(key: String, default: T): Flow<T>
+
+    /**
+     * Observes changes to a serializable value associated with the specified key.
+     *
+     * @param key The key to observe.
+     * @param default The default value to emit if the key does not exist.
+     * @param serializer The serializer for the value type.
+     * @return A [Flow] that emits the current value and subsequent updates.
+     */
+    fun <T> observeSerializableValue(
+        key: String,
+        default: T,
+        serializer: KSerializer<T>,
+    ): Flow<T>
+
+    /**
+     * Observes changes to the set of keys in the data store.
+     *
+     * @return A [Flow] that emits the current set of keys and subsequent updates.
+     */
+    fun observeKeys(): Flow<Set<String>>
+
+    /**
+     * Observes changes to the total number of entries in the data store.
+     *
+     * @return A [Flow] that emits the current size and subsequent updates.
+     */
+    fun observeSize(): Flow<Int>
+
+    /**
+     * Observes all changes that occur in the data store.
+     *
+     * @return A [Flow] that emits [DataStoreChangeEvent] instances for all changes.
+     */
+    fun observeChanges(): Flow<DataStoreChangeEvent>
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/contracts/TypedDataStore.kt

@@ -0,0 +1,83 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.contracts
+
+import kotlinx.serialization.KSerializer
+
+/**
+ * A type-safe interface for managing persistent data storage operations.
+ *
+ * This interface extends [DataStore] and provides methods for storing and retrieving typed data
+ * with proper serialization support. It ensures type safety through generic parameters and
+ * serialization mechanisms.
+ *
+ * Example usage:
+ * ```kotlin
+ * // Store a simple value
+ * dataStore.putValue("theme", "dark")
+ *
+ * // Store a serializable object
+ * dataStore.putSerializableValue("user", user, User.serializer())
+ *
+ * // Retrieve values
+ * val theme = dataStore.getValue("theme", "light")
+ * val user = dataStore.getSerializableValue("user", defaultUser, User.serializer())
+ * ```
+ *
+ * @param T The generic type parameter representing the data type to be stored
+ * @param K The generic type parameter representing the key type used for data identification
+ */
+interface TypedDataStore : DataStore {
+    /**
+     * Stores a value of type [T] associated with the specified key.
+     *
+     * @param key The unique identifier for the value
+     * @param value The value to be stored
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs
+     */
+    suspend fun <T> putValue(key: String, value: T): Result<Unit>
+
+    /**
+     * Retrieves a value of type [T] associated with the specified key.
+     *
+     * @param key The unique identifier for the value
+     * @param default The default value to return if the key does not exist
+     * @return [Result.success] containing the retrieved value, or [Result.failure] if an error occurs
+     */
+    suspend fun <T> getValue(key: String, default: T): Result<T>
+
+    /**
+     * Stores a serializable value of type [T] using the provided serializer.
+     *
+     * @param key The unique identifier for the value
+     * @param value The serializable value to be stored
+     * @param serializer The [KSerializer] for type [T]
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs
+     */
+    suspend fun <T> putSerializableValue(
+        key: String,
+        value: T,
+        serializer: KSerializer<T>,
+    ): Result<Unit>
+
+    /**
+     * Retrieves a serializable value of type [T] using the provided serializer.
+     *
+     * @param key The unique identifier for the value
+     * @param default The default value to return if the key does not exist
+     * @param serializer The [KSerializer] for type [T]
+     * @return [Result.success] containing the deserialized value, or [Result.failure] if an error occurs
+     */
+    suspend fun <T> getSerializableValue(
+        key: String,
+        default: T,
+        serializer: KSerializer<T>,
+    ): Result<T>
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/di/CoreDatastoreModule.kt

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.di
+
+import com.russhwolf.settings.Settings
+import kotlinx.coroutines.Dispatchers
+import org.koin.dsl.module
+import template.core.base.datastore.contracts.ReactiveDataStore
+import template.core.base.datastore.factory.DataStoreFactory
+import template.core.base.datastore.reactive.PreferenceFlowOperators
+import template.core.base.datastore.repository.ReactivePreferencesRepository
+
+/**
+ * Koin module for providing core datastore dependencies.
+ *
+ * Usage Example:
+ * ```kotlin
+ * startKoin {
+ *     modules(CoreDatastoreModule)
+ * }
+ * ```
+ */
+val CoreDatastoreModule = module {
+
+    // Platform-specific Settings instance
+    single<Settings> { Settings() }
+
+    // Main reactive datastore repository (recommended for most use cases)
+    single<ReactivePreferencesRepository> {
+        DataStoreFactory()
+            .settings(get())
+            .dispatcher(Dispatchers.Unconfined)
+            .cacheSize(200)
+            .build()
+    }
+
+    // Direct access to reactive datastore (if needed for specific use cases)
+    single<ReactiveDataStore> {
+        DataStoreFactory()
+            .settings(get())
+            .dispatcher(Dispatchers.Main)
+            .cacheSize(200)
+            .buildDataStore()
+    }
+
+    // Flow operators for advanced reactive operations
+    single<PreferenceFlowOperators> {
+        PreferenceFlowOperators(get<ReactivePreferencesRepository>())
+    }
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/exceptions/DataStoreExceptions.kt

@@ -0,0 +1,91 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.exceptions
+
+/**
+ * Base exception for all preference-related errors in the data store.
+ *
+ * @param message The error message.
+ * @param cause The cause of the exception, if any.
+ *
+ * Example:
+ * ```kotlin
+ * throw PreferencesException("Something went wrong")
+ * ```
+ */
+sealed class PreferencesException(message: String, cause: Throwable? = null) :
+    Exception(message, cause)
+
+/**
+ * Thrown when an invalid key is used in the data store.
+ *
+ * @param key The invalid key.
+ *
+ * Example:
+ * ```kotlin
+ * throw InvalidKeyException("invalid-key")
+ * ```
+ */
+class InvalidKeyException(key: String) : PreferencesException("Invalid key: $key")
+
+/**
+ * Thrown when serialization of a value fails.
+ *
+ * @param message The error message.
+ * @param cause The cause of the exception, if any.
+ *
+ * Example:
+ * ```kotlin
+ * throw SerializationException("Failed to serialize value")
+ * ```
+ */
+class SerializationException(message: String, cause: Throwable? = null) :
+    PreferencesException("Serialization failed: $message", cause)
+
+/**
+ * Thrown when deserialization of a value fails.
+ *
+ * @param message The error message.
+ * @param cause The cause of the exception, if any.
+ *
+ * Example:
+ * ```kotlin
+ * throw DeserializationException("Failed to deserialize value")
+ * ```
+ */
+class DeserializationException(message: String, cause: Throwable? = null) :
+    PreferencesException("Deserialization failed: $message", cause)
+
+/**
+ * Thrown when an unsupported type is used in the data store.
+ *
+ * @param type The unsupported type.
+ *
+ * Example:
+ * ```kotlin
+ * throw UnsupportedTypeException("CustomType")
+ * ```
+ */
+class UnsupportedTypeException(type: String) :
+    PreferencesException("Unsupported type: $type")
+
+/**
+ * Thrown when a cache operation fails in the data store.
+ *
+ * @param message The error message.
+ * @param cause The cause of the exception, if any.
+ *
+ * Example:
+ * ```kotlin
+ * throw CacheException("Failed to cache value")
+ * ```
+ */
+class CacheException(message: String, cause: Throwable? = null) :
+    PreferencesException("Cache operation failed: $message", cause)

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/extensions/FlowExtensions.kt

@@ -0,0 +1,162 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.extensions
+
+import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.debounce
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.filter
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.onEach
+import template.core.base.datastore.contracts.DataStoreChangeEvent
+
+/**
+ * Provides extension functions for Kotlin [Flow] related to data store operations.
+ *
+ * These extensions offer convenient ways to work with preference flows,
+ * such as mapping values with default handling, filtering by change type, and logging changes.
+ */
+
+/**
+ * Maps values emitted by the flow using the [transform] function and catches any errors,
+ * emitting the [default] value in case of failure.
+ *
+ * @param default The default value to emit if the transformation or upstream flow encounters an error.
+ * @param transform The function to apply to each value emitted by the flow.
+ * @return A [Flow] emitting the transformed values or the default value on error.
+ *
+ * Example usage:
+ * ```kotlin
+ * flowOf("1", "2", "abc") // Example flow of strings
+ *     .mapWithDefault(0) { it.toInt() } // Transform to Int, use 0 if parsing fails
+ *     .collect { value -> println(value) } // Prints 1, 2, 0
+ * ```
+ */
+fun <T, R> Flow<T>.mapWithDefault(default: R, transform: (T) -> R): Flow<R> {
+    return this.map { transform(it) }
+        .catch { emit(default) }
+}
+
+/**
+ * Filters a flow of [DataStoreChangeEvent] instances to emit only events of a specific type [T].
+ *
+ * This is useful for reacting only to specific changes like value additions or removals.
+ *
+ * @param T The specific type of [DataStoreChangeEvent] to filter for.
+ * @return A [Flow] emitting only [DataStoreChangeEvent] instances of type [T].
+ *
+ * Example usage:
+ * ```kotlin
+ * dataStore.observeChanges()
+ *     .filterChangeType<DataStoreChangeEvent.ValueAdded>()
+ *     .collect { event -> println("New value added: ${event.key}") }
+ * ```
+ */
+inline fun <reified T : DataStoreChangeEvent> Flow<DataStoreChangeEvent>.filterChangeType(): Flow<T> {
+    return this.map { it as? T }.filter { it != null }.map { it!! }
+}
+
+/**
+ * Filters a flow of [DataStoreChangeEvent] instances to emit only [ValueAdded] events.
+ *
+ * This is a convenience function equivalent to `filterChangeType<DataStoreChangeEvent.ValueAdded>()`.
+ *
+ * @return A [Flow] emitting only [DataStoreChangeEvent.ValueAdded] instances.
+ *
+ * Example usage:
+ * ```kotlin
+ * dataStore.observeChanges()
+ *     .onlyAdditions()
+ *     .collect { event -> println("Value added: ${event.key}") }
+ * ```
+ */
+fun Flow<DataStoreChangeEvent>.onlyAdditions(): Flow<DataStoreChangeEvent.ValueAdded> {
+    return filterChangeType()
+}
+
+/**
+ * Filters a flow of [DataStoreChangeEvent] instances to emit only [ValueUpdated] events.
+ *
+ * This is a convenience function equivalent to `filterChangeType<DataStoreChangeEvent.ValueUpdated>()`.
+ *
+ * @return A [Flow] emitting only [DataStoreChangeEvent.ValueUpdated] instances.
+ *
+ * Example usage:
+ * ```kotlin
+ * dataStore.observeChanges()
+ *     .onlyUpdates()
+ *     .collect { event -> println("Value updated: ${event.key}") }
+ * ```
+ */
+fun Flow<DataStoreChangeEvent>.onlyUpdates(): Flow<DataStoreChangeEvent.ValueUpdated> {
+    return filterChangeType()
+}
+
+/**
+ * Filters a flow of [DataStoreChangeEvent] instances to emit only [ValueRemoved] events.
+ *
+ * This is a convenience function equivalent to `filterChangeType<DataStoreChangeEvent.ValueRemoved>()`.
+ *
+ * @return A [Flow] emitting only [DataStoreChangeEvent.ValueRemoved] instances.
+ *
+ * Example usage:
+ * ```kotlin
+ * dataStore.observeChanges()
+ *     .onlyRemovals()
+ *     .collect { event -> println("Value removed: ${event.key}") }
+ * ```
+ */
+fun Flow<DataStoreChangeEvent>.onlyRemovals(): Flow<DataStoreChangeEvent.ValueRemoved> {
+    return filterChangeType()
+}
+
+/**
+ * Debounces a flow of preference changes to avoid excessive emissions.
+ *
+ * This uses [distinctUntilChanged] as a simple debouncing mechanism. For true time-based debouncing,
+ * consider using a library like `kotlinx-coroutines-core` with its `debounce` operator.
+ *
+ * @param timeoutMillis The timeout duration in milliseconds (currently not used for time-based debouncing).
+ * @return A [Flow] that suppresses consecutive duplicate emissions.
+ *
+ * Example usage:
+ * ```kotlin
+ * preferencesFlow
+ *     .debouncePreferences(300) // Suppress rapid identical emissions
+ *     .collect { value -> println("Debounced value: $value") }
+ * ```
+ */
+@OptIn(FlowPreview::class)
+fun <T> Flow<T>.debouncePreferences(timeoutMillis: Long = 300): Flow<T> {
+    // Note: This would require kotlinx-coroutines-core with debounce support
+    // For now, we'll use distinctUntilChanged as a simple approach
+    return this.debounce(timeoutMillis)
+}
+
+/**
+ * Logs each value emitted by the flow for debugging purposes.
+ *
+ * @param tag A tag to include in the log output.
+ * @return The original [Flow].
+ *
+ * Example usage:
+ * ```kotlin
+ * preferencesFlow
+ *     .logChanges("MyAppPrefs")
+ *     .collect { value -> // Process value }
+ * ```
+ */
+fun <T> Flow<T>.logChanges(tag: String = "DataStore"): Flow<T> {
+    return this.onEach { value ->
+        println("[$tag] Value changed: $value")
+    }
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/factory/DataStoreFactory.kt

@@ -0,0 +1,282 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.factory
+
+import com.russhwolf.settings.Settings
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.Dispatchers
+import template.core.base.datastore.cache.CacheManager
+import template.core.base.datastore.cache.LruCacheManager
+import template.core.base.datastore.contracts.ReactiveDataStore
+import template.core.base.datastore.handlers.BooleanTypeHandler
+import template.core.base.datastore.handlers.DoubleTypeHandler
+import template.core.base.datastore.handlers.FloatTypeHandler
+import template.core.base.datastore.handlers.IntTypeHandler
+import template.core.base.datastore.handlers.LongTypeHandler
+import template.core.base.datastore.handlers.StringTypeHandler
+import template.core.base.datastore.handlers.TypeHandler
+import template.core.base.datastore.reactive.ChangeNotifier
+import template.core.base.datastore.reactive.DefaultChangeNotifier
+import template.core.base.datastore.reactive.DefaultValueObserver
+import template.core.base.datastore.repository.DefaultReactivePreferencesRepository
+import template.core.base.datastore.repository.ReactivePreferencesRepository
+import template.core.base.datastore.serialization.JsonSerializationStrategy
+import template.core.base.datastore.serialization.SerializationStrategy
+import template.core.base.datastore.store.ReactiveUserPreferencesDataStore
+import template.core.base.datastore.validation.DefaultPreferencesValidator
+import template.core.base.datastore.validation.PreferencesValidator
+
+/**
+ * Factory for constructing reactive data store repositories and data stores with customizable configuration.
+ *
+ * This class uses the builder pattern to allow flexible configuration of settings, dispatcher,
+ * cache size, validator, serialization strategy, and change notifier.
+ *
+ * Example usage:
+ * ```kotlin
+ * // Simple usage with defaults
+ * val repository = DataStoreFactory.create()
+ *
+ * // Custom configuration
+ * val repository = DataStoreFactory()
+ *     .cacheSize(500)
+ *     .dispatcher(Dispatchers.IO)
+ *     .settings(MyCustomSettings())
+ *     .build()
+ * ```
+ */
+@Deprecated("Use Settings Library instead")
+class DataStoreFactory {
+    private var settings: Settings? = null
+    private var dispatcher: CoroutineDispatcher = Dispatchers.Default
+    private var cacheSize: Int = 200
+    private var validator: PreferencesValidator? = null
+    private var serializationStrategy: SerializationStrategy? = null
+    private var changeNotifier: ChangeNotifier? = null
+
+    /**
+     * Sets a custom [Settings] implementation for the data store.
+     *
+     * If not provided, the default [Settings] implementation will be used.
+     *
+     * @param settings The [Settings] instance to use.
+     * @return This [DataStoreFactory] instance for chaining.
+     */
+    fun settings(settings: Settings) = apply {
+        this.settings = settings
+    }
+
+    /**
+     * Sets the coroutine [dispatcher] for data store operations.
+     *
+     * The default is [Dispatchers.Default].
+     *
+     * @param dispatcher The [CoroutineDispatcher] to use.
+     * @return This [DataStoreFactory] instance for chaining.
+     */
+    fun dispatcher(dispatcher: CoroutineDispatcher) = apply {
+        this.dispatcher = dispatcher
+    }
+
+    /**
+     * Sets the cache size for the LRU cache.
+     *
+     * The default is 200 entries.
+     *
+     * @param size The maximum number of entries in the cache.
+     * @return This [DataStoreFactory] instance for chaining.
+     */
+    fun cacheSize(size: Int) = apply {
+        this.cacheSize = size
+    }
+
+    /**
+     * Sets a custom [PreferencesValidator] for validating keys and values.
+     *
+     * If not provided, the default validator will be used.
+     *
+     * @param validator The [PreferencesValidator] to use.
+     * @return This [DataStoreFactory] instance for chaining.
+     */
+    fun validator(validator: PreferencesValidator) = apply {
+        this.validator = validator
+    }
+
+    /**
+     * Sets a custom [SerializationStrategy] for serializing and deserializing values.
+     *
+     * If not provided, the default [JsonSerializationStrategy] will be used.
+     *
+     * @param strategy The [SerializationStrategy] to use.
+     * @return This [DataStoreFactory] instance for chaining.
+     */
+    fun serializationStrategy(strategy: SerializationStrategy) = apply {
+        this.serializationStrategy = strategy
+    }
+
+    /**
+     * Sets a custom [ChangeNotifier] for broadcasting change events.
+     *
+     * If not provided, the default [DefaultChangeNotifier] will be used.
+     *
+     * @param notifier The [ChangeNotifier] to use.
+     * @return This [DataStoreFactory] instance for chaining.
+     */
+    fun changeNotifier(notifier: ChangeNotifier) = apply {
+        this.changeNotifier = notifier
+    }
+
+    /**
+     * Builds and returns a [ReactivePreferencesRepository] with the current configuration.
+     *
+     * @return A fully configured [ReactivePreferencesRepository].
+     *
+     * Example usage:
+     * ```kotlin
+     * val repository = DataStoreFactory().build()
+     * ```
+     */
+    fun build(): ReactivePreferencesRepository {
+        val finalSettings = settings ?: Settings()
+        val finalValidator = validator ?: DefaultPreferencesValidator()
+        val finalSerializationStrategy = serializationStrategy ?: JsonSerializationStrategy()
+        val finalChangeNotifier = changeNotifier ?: DefaultChangeNotifier()
+
+        val cacheManager: CacheManager<String, Any> = LruCacheManager(maxSize = cacheSize)
+        val valueObserver = DefaultValueObserver(finalChangeNotifier)
+
+        @Suppress("UNCHECKED_CAST")
+        val typeHandlers: List<TypeHandler<Any>> = listOf(
+            IntTypeHandler(),
+            StringTypeHandler(),
+            BooleanTypeHandler(),
+            LongTypeHandler(),
+            FloatTypeHandler(),
+            DoubleTypeHandler(),
+        ) as List<TypeHandler<Any>>
+
+        val reactiveDataStore = ReactiveUserPreferencesDataStore(
+            settings = finalSettings,
+            dispatcher = dispatcher,
+            typeHandlers = typeHandlers,
+            serializationStrategy = finalSerializationStrategy,
+            validator = finalValidator,
+            cacheManager = cacheManager,
+            changeNotifier = finalChangeNotifier,
+            valueObserver = valueObserver,
+        )
+
+        return DefaultReactivePreferencesRepository(reactiveDataStore)
+    }
+
+    /**
+     * Builds and returns a [ReactiveDataStore] with the current configuration, without the repository wrapper.
+     *
+     * Use this if you need direct access to data store methods.
+     *
+     * @return A fully configured [ReactiveDataStore].
+     *
+     * Example usage:
+     * ```kotlin
+     * val dataStore = DataStoreFactory().buildDataStore()
+     * ```
+     */
+    fun buildDataStore(): ReactiveDataStore {
+        val finalSettings = settings ?: Settings()
+        val finalValidator = validator ?: DefaultPreferencesValidator()
+        val finalSerializationStrategy = serializationStrategy ?: JsonSerializationStrategy()
+        val finalChangeNotifier = changeNotifier ?: DefaultChangeNotifier()
+
+        val cacheManager: CacheManager<String, Any> = LruCacheManager(maxSize = cacheSize)
+        val valueObserver = DefaultValueObserver(finalChangeNotifier)
+
+        @Suppress("UNCHECKED_CAST")
+        val typeHandlers: List<TypeHandler<Any>> = listOf(
+            IntTypeHandler(),
+            StringTypeHandler(),
+            BooleanTypeHandler(),
+            LongTypeHandler(),
+            FloatTypeHandler(),
+            DoubleTypeHandler(),
+        ) as List<TypeHandler<Any>>
+
+        return ReactiveUserPreferencesDataStore(
+            settings = finalSettings,
+            dispatcher = dispatcher,
+            typeHandlers = typeHandlers,
+            serializationStrategy = finalSerializationStrategy,
+            validator = finalValidator,
+            cacheManager = cacheManager,
+            changeNotifier = finalChangeNotifier,
+            valueObserver = valueObserver,
+        )
+    }
+
+    companion object {
+        /**
+         * Creates a [ReactivePreferencesRepository] with default configuration.
+         *
+         * This is the simplest way to obtain a working data store repository.
+         *
+         * @return A [ReactivePreferencesRepository] with default settings.
+         *
+         * Example usage:
+         * ```kotlin
+         * val repository = DataStoreFactory.create()
+         * ```
+         */
+        fun create(): ReactivePreferencesRepository {
+            return DataStoreFactory().build()
+        }
+
+        /**
+         * Creates a [ReactivePreferencesRepository] with a custom [Settings] instance.
+         *
+         * Useful for providing platform-specific settings.
+         *
+         * @param settings The [Settings] instance to use.
+         * @return A [ReactivePreferencesRepository] with the specified settings.
+         *
+         * Example usage:
+         * ```kotlin
+         * val repository = DataStoreFactory.create(customSettings)
+         * ```
+         */
+        fun create(settings: Settings): ReactivePreferencesRepository {
+            return DataStoreFactory()
+                .settings(settings)
+                .build()
+        }
+
+        /**
+         * Creates a [ReactivePreferencesRepository] with a custom [Settings] instance and [CoroutineDispatcher].
+         *
+         * Useful for platform-specific configurations (e.g., Android/iOS).
+         *
+         * @param settings The [Settings] instance to use.
+         * @param dispatcher The [CoroutineDispatcher] to use.
+         * @return A [ReactivePreferencesRepository] with the specified settings and dispatcher.
+         *
+         * Example usage:
+         * ```kotlin
+         * val repository = DataStoreFactory.create(customSettings, Dispatchers.IO)
+         * ```
+         */
+        fun create(
+            settings: Settings,
+            dispatcher: CoroutineDispatcher,
+        ): ReactivePreferencesRepository {
+            return DataStoreFactory()
+                .settings(settings)
+                .dispatcher(dispatcher)
+                .build()
+        }
+    }
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/handlers/PrimitiveTypeHandlers.kt

@@ -0,0 +1,162 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.handlers
+
+import com.russhwolf.settings.Settings
+
+/**
+ * Handler for storing and retrieving [Int] values in the data store.
+ *
+ * Example usage:
+ * ```kotlin
+ * val handler = IntTypeHandler()
+ * handler.put(settings, "count", 42)
+ * val value = handler.get(settings, "count", 0)
+ * ```
+ */
+class IntTypeHandler : TypeHandler<Int> {
+    override suspend fun put(settings: Settings, key: String, value: Int): Result<Unit> {
+        println("[IntTypeHandler] put: key=$key, value=$value")
+        return runCatching { settings.putInt(key, value) }
+    }
+
+    override suspend fun get(settings: Settings, key: String, default: Int): Result<Int> {
+        val result = runCatching { settings.getInt(key, default) }
+        println("[IntTypeHandler] get: key=$key, result=$result")
+        return result
+    }
+
+    override fun canHandle(value: Any?): Boolean = value is Int
+}
+
+/**
+ * Handler for storing and retrieving [String] values in the data store.
+ *
+ * Example usage:
+ * ```kotlin
+ * val handler = StringTypeHandler()
+ * handler.put(settings, "username", "admin")
+ * val value = handler.get(settings, "username", "default")
+ * ```
+ */
+class StringTypeHandler : TypeHandler<String> {
+    override suspend fun put(settings: Settings, key: String, value: String): Result<Unit> {
+        println("[StringTypeHandler] put: key=$key, value=$value")
+        return runCatching { settings.putString(key, value) }
+    }
+
+    override suspend fun get(settings: Settings, key: String, default: String): Result<String> {
+        val result = runCatching { settings.getString(key, default) }
+        println("[StringTypeHandler] get: key=$key, result=$result")
+        return result
+    }
+
+    override fun canHandle(value: Any?): Boolean = value is String
+}
+
+/**
+ * Handler for storing and retrieving [Boolean] values in the data store.
+ *
+ * Example usage:
+ * ```kotlin
+ * val handler = BooleanTypeHandler()
+ * handler.put(settings, "enabled", true)
+ * val value = handler.get(settings, "enabled", false)
+ * ```
+ */
+class BooleanTypeHandler : TypeHandler<Boolean> {
+    override suspend fun put(settings: Settings, key: String, value: Boolean): Result<Unit> {
+        println("[BooleanTypeHandler] put: key=$key, value=$value")
+        return runCatching { settings.putBoolean(key, value) }
+    }
+
+    override suspend fun get(settings: Settings, key: String, default: Boolean): Result<Boolean> {
+        val result = runCatching { settings.getBoolean(key, default) }
+        println("[BooleanTypeHandler] get: key=$key, result=$result")
+        return result
+    }
+
+    override fun canHandle(value: Any?): Boolean = value is Boolean
+}
+
+/**
+ * Handler for storing and retrieving [Long] values in the data store.
+ *
+ * Example usage:
+ * ```kotlin
+ * val handler = LongTypeHandler()
+ * handler.put(settings, "timestamp", 123456789L)
+ * val value = handler.get(settings, "timestamp", 0L)
+ * ```
+ */
+class LongTypeHandler : TypeHandler<Long> {
+    override suspend fun put(settings: Settings, key: String, value: Long): Result<Unit> {
+        println("[LongTypeHandler] put: key=$key, value=$value")
+        return runCatching { settings.putLong(key, value) }
+    }
+
+    override suspend fun get(settings: Settings, key: String, default: Long): Result<Long> {
+        val result = runCatching { settings.getLong(key, default) }
+        println("[LongTypeHandler] get: key=$key, result=$result")
+        return result
+    }
+
+    override fun canHandle(value: Any?): Boolean = value is Long
+}
+
+/**
+ * Handler for storing and retrieving [Float] values in the data store.
+ *
+ * Example usage:
+ * ```kotlin
+ * val handler = FloatTypeHandler()
+ * handler.put(settings, "ratio", 0.5f)
+ * val value = handler.get(settings, "ratio", 0.0f)
+ * ```
+ */
+class FloatTypeHandler : TypeHandler<Float> {
+    override suspend fun put(settings: Settings, key: String, value: Float): Result<Unit> {
+        println("[FloatTypeHandler] put: key=$key, value=$value")
+        return runCatching { settings.putFloat(key, value) }
+    }
+
+    override suspend fun get(settings: Settings, key: String, default: Float): Result<Float> {
+        val result = runCatching { settings.getFloat(key, default) }
+        println("[FloatTypeHandler] get: key=$key, result=$result")
+        return result
+    }
+
+    override fun canHandle(value: Any?): Boolean = value is Float
+}
+
+/**
+ * Handler for storing and retrieving [Double] values in the data store.
+ *
+ * Example usage:
+ * ```kotlin
+ * val handler = DoubleTypeHandler()
+ * handler.put(settings, "score", 99.9)
+ * val value = handler.get(settings, "score", 0.0)
+ * ```
+ */
+class DoubleTypeHandler : TypeHandler<Double> {
+    override suspend fun put(settings: Settings, key: String, value: Double): Result<Unit> {
+        println("[DoubleTypeHandler] put: key=$key, value=$value")
+        return runCatching { settings.putDouble(key, value) }
+    }
+
+    override suspend fun get(settings: Settings, key: String, default: Double): Result<Double> {
+        val result = runCatching { settings.getDouble(key, default) }
+        println("[DoubleTypeHandler] get: key=$key, result=$result")
+        return result
+    }
+
+    override fun canHandle(value: Any?): Boolean = value is Double
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/handlers/TypeHandler.kt

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.handlers
+
+import com.russhwolf.settings.Settings
+
+/**
+ * Interface for handling type conversions and storage operations in the data store.
+ *
+ * Implementations of this interface provide methods for storing, retrieving,
+ * and checking support for specific types in the underlying settings storage.
+ *
+ * Example usage:
+ * ```kotlin
+ * val handler: TypeHandler<Int> = IntTypeHandler()
+ * handler.put(settings, "count", 42)
+ * val value = handler.get(settings, "count", 0)
+ * ```
+ *
+ * @param T The type to be handled by this handler.
+ */
+interface TypeHandler<T> {
+    /**
+     * Stores a value of type [T] in the settings storage.
+     *
+     * @param settings The settings storage instance.
+     * @param key The key to associate with the value.
+     * @param value The value to store.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     */
+    suspend fun put(settings: Settings, key: String, value: T): Result<Unit>
+
+    /**
+     * Retrieves a value of type [T] from the settings storage.
+     *
+     * @param settings The settings storage instance.
+     * @param key The key to retrieve.
+     * @param default The default value to return if the key does not exist.
+     * @return [Result.success] with the value, or [Result.failure] if an error occurs.
+     */
+    suspend fun get(settings: Settings, key: String, default: T): Result<T>
+
+    /**
+     * Determines whether this handler can process the given value.
+     *
+     * @param value The value to check.
+     * @return `true` if this handler can process the value, `false` otherwise.
+     */
+    fun canHandle(value: Any?): Boolean
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/reactive/ChangeNotifier.kt

@@ -0,0 +1,57 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.reactive
+
+import kotlinx.coroutines.flow.Flow
+import template.core.base.datastore.contracts.DataStoreChangeEvent
+
+/**
+ * Interface for notifying and observing changes in the data store.
+ *
+ * Implementations of this interface allow for broadcasting change events
+ * and subscribing to them, enabling reactive updates throughout the application.
+ *
+ * Example usage:
+ * ```kotlin
+ * val notifier: ChangeNotifier = DefaultChangeNotifier()
+ * notifier.notifyChange(DataStoreChangeEvent.ValueAdded("key", "value"))
+ * notifier.observeChanges().collect { event -> println(event) }
+ * ```
+ */
+interface ChangeNotifier {
+    /**
+     * Notifies listeners of a change event in the data store.
+     *
+     * @param change The event describing the change.
+     */
+    fun notifyChange(change: DataStoreChangeEvent)
+
+    /**
+     * Observes all change events in the data store.
+     *
+     * @return A [Flow] emitting [DataStoreChangeEvent] instances as changes occur.
+     */
+    fun observeChanges(): Flow<DataStoreChangeEvent>
+
+    /**
+     * Observes change events for a specific key in the data store.
+     *
+     * @param key The key to observe for changes.
+     * @return A [Flow] emitting [DataStoreChangeEvent] instances related to the specified key.
+     */
+    fun observeKeyChanges(key: String): Flow<DataStoreChangeEvent>
+
+    /**
+     * Clears all listeners and resources associated with this notifier.
+     *
+     * This should be called to release resources when the notifier is no longer needed.
+     */
+    fun clear()
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/reactive/DefaultChangeNotifier.kt

@@ -0,0 +1,232 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+@file:OptIn(ExperimentalAtomicApi::class)
+
+package template.core.base.datastore.reactive
+
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.TimeoutCancellationException
+import kotlinx.coroutines.cancel
+import kotlinx.coroutines.channels.BufferOverflow
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.filter
+import kotlinx.coroutines.flow.onCompletion
+import kotlinx.coroutines.flow.onStart
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withTimeout
+import template.core.base.datastore.contracts.DataStoreChangeEvent
+import kotlin.concurrent.atomics.AtomicBoolean
+import kotlin.concurrent.atomics.AtomicInt
+import kotlin.concurrent.atomics.ExperimentalAtomicApi
+import kotlin.concurrent.atomics.decrementAndFetch
+import kotlin.concurrent.atomics.incrementAndFetch
+import kotlin.coroutines.cancellation.CancellationException
+
+/**
+ * Production-ready implementation of [ChangeNotifier] using SharedFlow for true event broadcasting.
+ *
+ * This implementation ensures all observers receive all events, with configurable buffering and
+ * overflow strategies. It's thread-safe and follows structured concurrency principles.
+ *
+ * Key improvements over Channel-based implementation:
+ * - Multiple observers receive ALL events (not just one)
+ * - Non-blocking event emission
+ * - Configurable replay for late subscribers
+ * - Better memory management with overflow strategies
+ * - Proper structured concurrency (no GlobalScope)
+ *
+ * Example usage:
+ * ```kotlin
+ * val notifier = DefaultChangeNotifier()
+ *
+ * // Multiple observers all receive the same events
+ * val job1 = launch { notifier.observeChanges().collect { println("Observer 1: $it") } }
+ * val job2 = launch { notifier.observeChanges().collect { println("Observer 2: $it") } }
+ *
+ * notifier.notifyChange(DataStoreChangeEvent.ValueAdded("key", "value"))
+ * // Both observers receive the event
+ * ```
+ *
+ * @property replay Number of events to replay to new subscribers (default: 0)
+ * @property extraBufferCapacity Extra buffer capacity beyond replay (default: 64)
+ * @property onBufferOverflow Strategy when buffer is full (default: DROP_OLDEST)
+ * @property scope Optional coroutine scope for handling suspended emissions
+ */
+@Suppress("MaxLineLength")
+class DefaultChangeNotifier(
+    private val replay: Int = 0,
+    private val extraBufferCapacity: Int = 64,
+    private val onBufferOverflow: BufferOverflow = BufferOverflow.DROP_OLDEST,
+    private val scope: CoroutineScope? = null,
+) : ChangeNotifier {
+
+    private val changeFlow = MutableSharedFlow<DataStoreChangeEvent>(
+        replay = replay,
+        extraBufferCapacity = extraBufferCapacity,
+        onBufferOverflow = onBufferOverflow,
+    )
+
+    // Track active observers for debugging/monitoring
+    private val activeObservers = AtomicInt(0)
+
+    // Track if the notifier has been cleared
+    private val isCleared = AtomicBoolean(false)
+
+    // Internal scope for SUSPEND operations if no external scope provided
+    private val internalScope = scope ?: CoroutineScope(SupervisorJob() + Dispatchers.Default)
+
+    /**
+     * Notifies all active listeners of a change event.
+     *
+     * This method is non-blocking and thread-safe. If the buffer is full,
+     * the behavior depends on the configured [onBufferOverflow] strategy.
+     *
+     * For SUSPEND strategy without a provided scope, events will be dropped with a warning.
+     *
+     * @param change The event describing the change.
+     */
+    override fun notifyChange(change: DataStoreChangeEvent) {
+        if (isCleared.load()) {
+            println("[ChangeNotifier] Attempted to notify after clear: $change")
+            return
+        }
+
+        val emitted = changeFlow.tryEmit(change)
+
+        if (!emitted) {
+            when (onBufferOverflow) {
+                BufferOverflow.DROP_OLDEST -> {
+                    // Already handled by SharedFlow internally
+                    println("[ChangeNotifier] Buffer full, dropped oldest event for: $change")
+                }
+
+                BufferOverflow.DROP_LATEST -> {
+                    println("[ChangeNotifier] Buffer full, dropping event: $change")
+                }
+
+                BufferOverflow.SUSPEND -> {
+                    // Only attempt suspended emission if we have a scope
+                    if (scope != null || !isCleared.load()) {
+                        internalScope.launch {
+                            try {
+                                // 5 second timeout to prevent indefinite blocking
+                                withTimeout(5000) {
+                                    changeFlow.emit(change)
+                                }
+                            } catch (e: TimeoutCancellationException) {
+                                println("[ChangeNotifier] Timeout emitting event: $change")
+                            } catch (e: CancellationException) {
+                                // Scope was cancelled, ignore
+                            } catch (e: Exception) {
+                                println("[ChangeNotifier] Failed to emit suspended event: $change, error: $e")
+                            }
+                        }
+                    } else {
+                        println("[ChangeNotifier] Buffer full, cannot emit with SUSPEND strategy without scope: $change")
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Suspending version of notifyChange for use within coroutines.
+     * This will suspend until the event can be emitted.
+     *
+     * @param change The event describing the change.
+     * @throws CancellationException if the coroutine is cancelled
+     */
+    suspend fun notifyChangeSuspend(change: DataStoreChangeEvent) {
+        if (!isCleared.load()) {
+            changeFlow.emit(change)
+        }
+    }
+
+    /**
+     * Tries to notify with a result indicating success.
+     *
+     * @param change The event describing the change.
+     * @return true if the event was emitted successfully, false otherwise
+     */
+    fun tryNotifyChange(change: DataStoreChangeEvent): Boolean {
+        return if (!isCleared.load()) {
+            changeFlow.tryEmit(change)
+        } else {
+            false
+        }
+    }
+
+    /**
+     * Observes all change events emitted to this notifier.
+     *
+     * Each collector receives ALL events independently. Late subscribers
+     * will receive replayed events based on the [replay] configuration.
+     *
+     * @return A [Flow] emitting [DataStoreChangeEvent] instances as changes occur.
+     */
+    override fun observeChanges(): Flow<DataStoreChangeEvent> {
+        return changeFlow
+            .onStart {
+                val count = activeObservers.incrementAndFetch()
+                println("[ChangeNotifier] New observer connected. Total: $count")
+            }
+            .onCompletion {
+                val count = activeObservers.decrementAndFetch()
+                println("[ChangeNotifier] Observer disconnected. Total: $count")
+            }
+    }
+
+    /**
+     * Observes change events for a specific key.
+     *
+     * @param key The key to observe for changes.
+     * @return A [Flow] emitting [DataStoreChangeEvent] instances related to the specified key.
+     */
+    override fun observeKeyChanges(key: String): Flow<DataStoreChangeEvent> {
+        return observeChanges().filter { event ->
+            event.key == key || event.key == "*"
+        }
+    }
+
+    /**
+     * Clears the notifier and releases resources.
+     *
+     * After calling clear, no new events should be emitted.
+     */
+    override fun clear() {
+        if (isCleared.compareAndSet(false, true)) {
+            // Cancel internal scope if we created it
+            if (scope == null) {
+                internalScope.cancel()
+            }
+            println("[ChangeNotifier] Cleared. Active observers: ${activeObservers.load()}")
+        }
+    }
+
+    /**
+     * Get the current number of active observers.
+     * Useful for debugging and monitoring.
+     */
+    fun loadActiveObserverCount(): Int = activeObservers.load()
+
+    /**
+     * Check if the notifier has been cleared.
+     */
+    fun isCleared(): Boolean = isCleared.load()
+
+    /**
+     * Get the current number of buffered events.
+     * Useful for monitoring buffer usage.
+     */
+    fun getBufferedEventCount(): Int = changeFlow.subscriptionCount.value
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/reactive/DefaultValueObserver.kt

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.reactive
+
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.onStart
+import template.core.base.datastore.contracts.DataStoreChangeEvent
+
+/**
+ * Default implementation of [ValueObserver] for observing preference value changes.
+ *
+ * This observer uses a [ChangeNotifier] to emit value changes as flows, supporting both initial and distinct emissions.
+ *
+ * Example usage:
+ * ```kotlin
+ * val observer = DefaultValueObserver(changeNotifier)
+ * observer.createValueFlow("theme", "light") { getTheme() }
+ * ```
+ *
+ * @property changeNotifier The notifier used to observe key changes.
+ */
+class DefaultValueObserver(
+    private val changeNotifier: ChangeNotifier,
+) : ValueObserver {
+
+    /**
+     * Creates a flow that emits the value for the specified key, starting with an initial emission.
+     *
+     * @param key The preference key to observe.
+     * @param default The default value to emit if retrieval fails.
+     * @param getter A suspend function to retrieve the value.
+     * @return A [Flow] emitting the value for the key.
+     *
+     * Example usage:
+     * ```kotlin
+     * observer.createValueFlow("theme", "light") { getTheme() }
+     * ```
+     */
+    override fun <T> createValueFlow(
+        key: String,
+        default: T,
+        getter: suspend () -> Result<T>,
+    ): Flow<T> {
+        return changeNotifier.observeKeyChanges(key)
+            // Trigger initial emission
+            .onStart { emit(DataStoreChangeEvent.ValueAdded(key, null)) }
+            .map { getter().getOrElse { default } }
+    }
+
+    /**
+     * Creates a flow that emits distinct values for the specified key, suppressing duplicates.
+     *
+     * @param key The preference key to observe.
+     * @param default The default value to emit if retrieval fails.
+     * @param getter A suspend function to retrieve the value.
+     * @return A [Flow] emitting only distinct values for the key.
+     *
+     * Example usage:
+     * ```kotlin
+     * observer.createDistinctValueFlow("theme", "light") { getTheme() }
+     * ```
+     */
+    override fun <T> createDistinctValueFlow(
+        key: String,
+        default: T,
+        getter: suspend () -> Result<T>,
+    ): Flow<T> {
+        return createValueFlow(key, default, getter).distinctUntilChanged()
+    }
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/reactive/PreferenceFlowOperators.kt

@@ -0,0 +1,130 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+@file:Suppress("MaxLineLength")
+
+package template.core.base.datastore.reactive
+
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.filter
+import kotlinx.coroutines.flow.map
+import template.core.base.datastore.repository.ReactivePreferencesRepository
+
+/**
+ * Provides advanced operations for combining, mapping, and observing user preference flows.
+ *
+ * This class enables the combination of multiple preference flows, observation of key changes,
+ * and transformation of observed values.
+ *
+ * Example usage:
+ * ```kotlin
+ * val operators = PreferenceFlowOperators(repository)
+ * val combinedFlow = operators.combinePreferences("key1", 0, "key2", "", transform = { a, b -> "$a-$b" })
+ * ```
+ *
+ * @property repository The [ReactivePreferencesRepository] used to observe and manipulate preference flows.
+ */
+class PreferenceFlowOperators(
+    private val repository: ReactivePreferencesRepository,
+) {
+    /**
+     * Combines two preference flows and emits a value produced by the [transform] function.
+     *
+     * @param key1 The first preference key.
+     * @param default1 The default value for the first preference.
+     * @param key2 The second preference key.
+     * @param default2 The default value for the second preference.
+     * @param transform The function to combine the two values.
+     * @return A [Flow] emitting the combined value.
+     *
+     * Example usage:
+     * ```kotlin
+     * operators.combinePreferences("theme", "light", "fontSize", 12) { theme, size -> "$theme-$size" }
+     * ```
+     */
+    fun <T1, T2, R> combinePreferences(
+        key1: String,
+        default1: T1,
+        key2: String,
+        default2: T2,
+        transform: suspend (T1, T2) -> R,
+    ): Flow<R> = combine(
+        repository.observePreference(key1, default1),
+        repository.observePreference(key2, default2),
+        transform,
+    )
+
+    /**
+     * Combines three preference flows and emits a value produced by the [transform] function.
+     *
+     * @param key1 The first preference key.
+     * @param default1 The default value for the first preference.
+     * @param key2 The second preference key.
+     * @param default2 The default value for the second preference.
+     * @param key3 The third preference key.
+     * @param default3 The default value for the third preference.
+     * @param transform The function to combine the three values.
+     * @return A [Flow] emitting the combined value.
+     *
+     * Example usage:
+     * ```kotlin
+     * operators.combinePreferences("theme", "light", "fontSize", 12, "lang", "en") { t, s, l -> "$t-$s-$l" }
+     * ```
+     */
+    fun <T1, T2, T3, R> combinePreferences(
+        key1: String,
+        default1: T1,
+        key2: String,
+        default2: T2,
+        key3: String,
+        default3: T3,
+        transform: suspend (T1, T2, T3) -> R,
+    ): Flow<R> = combine(
+        repository.observePreference(key1, default1),
+        repository.observePreference(key2, default2),
+        repository.observePreference(key3, default3),
+        transform,
+    )
+
+    /**
+     * Observes changes to any of the specified keys and emits the key that changed.
+     *
+     * @param keys The keys to observe for changes.
+     * @return A [Flow] emitting the key that changed.
+     *
+     * Example usage:
+     * ```kotlin
+     * operators.observeAnyKeyChange("theme", "fontSize").collect { key -> println("Changed: $key") }
+     * ```
+     */
+    fun observeAnyKeyChange(vararg keys: String): Flow<String> =
+        repository.observePreferenceChanges()
+            .map { it.key }
+            .filter { it in keys }
+
+    /**
+     * Observes a preference and maps its value using the provided [transform] function.
+     *
+     * @param key The preference key to observe.
+     * @param default The default value for the preference.
+     * @param transform The function to map the preference value.
+     * @return A [Flow] emitting the mapped value.
+     *
+     * Example usage:
+     * ```kotlin
+     * operators.observeMappedPreference("theme", "light") { it.uppercase() }
+     * ```
+     */
+    fun <T, R> observeMappedPreference(
+        key: String,
+        default: T,
+        transform: suspend (T) -> R,
+    ): Flow<R> = repository.observePreference(key, default).map(transform)
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/reactive/ValueObserver.kt

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.reactive
+
+import kotlinx.coroutines.flow.Flow
+
+/**
+ * Interface for observing value changes in the data store as flows.
+ *
+ * Implementations of this interface provide mechanisms to create flows
+ * that emit values for specific keys, supporting both initial and distinct emissions.
+ *
+ * Example usage:
+ * ```kotlin
+ * val observer: ValueObserver = DefaultValueObserver(changeNotifier)
+ * observer.createValueFlow("theme", "light") { getTheme() }
+ * ```
+ */
+interface ValueObserver {
+    /**
+     * Creates a flow that emits the value for the specified key.
+     *
+     * @param key The preference key to observe.
+     * @param default The default value to emit if retrieval fails.
+     * @param getter A suspend function to retrieve the value.
+     * @return A [Flow] emitting the value for the key.
+     */
+    fun <T> createValueFlow(
+        key: String,
+        default: T,
+        getter: suspend () -> Result<T>,
+    ): Flow<T>
+
+    /**
+     * Creates a flow that emits only distinct values for the specified key, suppressing duplicates.
+     *
+     * @param key The preference key to observe.
+     * @param default The default value to emit if retrieval fails.
+     * @param getter A suspend function to retrieve the value.
+     * @return A [Flow] emitting only distinct values for the key.
+     */
+    fun <T> createDistinctValueFlow(
+        key: String,
+        default: T,
+        getter: suspend () -> Result<T>,
+    ): Flow<T>
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/repository/DefaultReactivePreferencesRepository.kt

@@ -0,0 +1,152 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.repository
+
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.filter
+import kotlinx.serialization.KSerializer
+import template.core.base.datastore.contracts.DataStoreChangeEvent
+import template.core.base.datastore.contracts.ReactiveDataStore
+
+/**
+ * Default implementation of [ReactivePreferencesRepository] that delegates operations
+ * to an underlying [ReactiveDataStore].
+ *
+ * This class provides the reactive repository interface by interacting with
+ * a reactive data store instance.
+ *
+ * Example usage:
+ * ```kotlin
+ * // Obtain an instance, e.g., from DataStoreFactory().buildDataStore()
+ * val dataStore: ReactiveDataStore = ...
+ * val repository = DefaultReactivePreferencesRepository(dataStore)
+ *
+ * // Use repository methods
+ * repository.savePreference("user_id", "123")
+ * repository.observePreference("user_id", "").collect { id -> println(id) }
+ * ```
+ *
+ * @property reactiveDataStore The underlying [ReactiveDataStore] instance.
+ */
+class DefaultReactivePreferencesRepository(
+    private val reactiveDataStore: ReactiveDataStore,
+) : ReactivePreferencesRepository {
+
+    // Delegate base operations
+    /**
+     * {@inheritDoc}
+     */
+    override suspend fun <T> savePreference(key: String, value: T): Result<Unit> {
+        println("[Repository] savePreference: key=$key, value=$value")
+        return reactiveDataStore.putValue(key, value)
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    override suspend fun <T> getPreference(key: String, default: T): Result<T> {
+        return reactiveDataStore.getValue(key, default)
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    override suspend fun <T> saveSerializablePreference(
+        key: String,
+        value: T,
+        serializer: KSerializer<T>,
+    ): Result<Unit> {
+        return reactiveDataStore.putSerializableValue(key, value, serializer)
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    override suspend fun <T> getSerializablePreference(
+        key: String,
+        default: T,
+        serializer: KSerializer<T>,
+    ): Result<T> {
+        return reactiveDataStore.getSerializableValue(key, default, serializer)
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    override suspend fun removePreference(key: String): Result<Unit> {
+        println("[Repository] removePreference: key=$key")
+        return reactiveDataStore.removeValue(key)
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    override suspend fun clearAllPreferences(): Result<Unit> {
+        println("[Repository] clearAllPreferences")
+        return reactiveDataStore.clearAll()
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    override suspend fun hasPreference(key: String): Boolean {
+        return reactiveDataStore.hasKey(key).getOrDefault(false)
+    }
+
+    // Reactive operations
+    /**
+     * {@inheritDoc}
+     */
+    override fun <T> observePreference(key: String, default: T): Flow<T> {
+        return reactiveDataStore.observeValue(key, default)
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    override fun <T> observeSerializablePreference(
+        key: String,
+        default: T,
+        serializer: KSerializer<T>,
+    ): Flow<T> {
+        return reactiveDataStore.observeSerializableValue(key, default, serializer)
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    override fun observeAllKeys(): Flow<Set<String>> {
+        println("[Repository] observeAllKeys: flow created")
+        return reactiveDataStore.observeKeys()
+            .also { println("[Repository] observeAllKeys: flow returned") }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    override fun observePreferenceCount(): Flow<Int> {
+        return reactiveDataStore.observeSize()
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    override fun observePreferenceChanges(): Flow<DataStoreChangeEvent> {
+        return reactiveDataStore.observeChanges()
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    override fun observePreferenceChanges(key: String): Flow<DataStoreChangeEvent> {
+        return reactiveDataStore.observeChanges()
+            .filter { it.key == key || it.key == "*" }
+    }
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/repository/PreferencesRepository.kt

@@ -0,0 +1,99 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.repository
+
+import kotlinx.serialization.KSerializer
+
+/**
+ * Interface for managing user preferences in a type-safe and coroutine-friendly manner.
+ *
+ * Implementations of this interface provide methods for saving, retrieving,
+ * and removing preferences, supporting both primitive and serializable types.
+ *
+ * Example usage:
+ * ```kotlin
+ * val repository: PreferencesRepository = ...
+ * repository.savePreference("theme", "dark")
+ * val theme = repository.getPreference("theme", "light")
+ * repository.removePreference("theme")
+ * repository.clearAllPreferences()
+ * val exists = repository.hasPreference("theme")
+ * ```
+ */
+interface PreferencesRepository {
+    /**
+     * Saves a value associated with the specified key in the preferences.
+     *
+     * @param key The key to associate with the value.
+     * @param value The value to store.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     */
+    suspend fun <T> savePreference(key: String, value: T): Result<Unit>
+
+    /**
+     * Retrieves a value associated with the specified key from the preferences.
+     *
+     * @param key The key to retrieve.
+     * @param default The default value to return if the key does not exist.
+     * @return [Result.success] with the value, or [Result.failure] if an error occurs.
+     */
+    suspend fun <T> getPreference(key: String, default: T): Result<T>
+
+    /**
+     * Saves a serializable value using the provided serializer.
+     *
+     * @param key The key to associate with the value.
+     * @param value The value to store.
+     * @param serializer The serializer for the value type.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     */
+    suspend fun <T> saveSerializablePreference(
+        key: String,
+        value: T,
+        serializer: KSerializer<T>,
+    ): Result<Unit>
+
+    /**
+     * Retrieves a serializable value using the provided serializer.
+     *
+     * @param key The key to retrieve.
+     * @param default The default value to return if the key does not exist.
+     * @param serializer The serializer for the value type.
+     * @return [Result.success] with the value, or [Result.failure] if an error occurs.
+     */
+    suspend fun <T> getSerializablePreference(
+        key: String,
+        default: T,
+        serializer: KSerializer<T>,
+    ): Result<T>
+
+    /**
+     * Removes the value associated with the specified key from the preferences.
+     *
+     * @param key The key to remove.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     */
+    suspend fun removePreference(key: String): Result<Unit>
+
+    /**
+     * Clears all stored preferences.
+     *
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     */
+    suspend fun clearAllPreferences(): Result<Unit>
+
+    /**
+     * Checks if the specified key exists in the preferences.
+     *
+     * @param key The key to check.
+     * @return `true` if the key exists, `false` otherwise.
+     */
+    suspend fun hasPreference(key: String): Boolean
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/repository/ReactivePreferencesRepository.kt

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.repository
+
+import kotlinx.coroutines.flow.Flow
+import kotlinx.serialization.KSerializer
+import template.core.base.datastore.contracts.DataStoreChangeEvent
+
+/**
+ * Interface for managing user preferences with reactive (Flow-based) observation capabilities.
+ *
+ * This interface extends [PreferencesRepository] and adds methods for observing preference values,
+ * keys, and change events as Kotlin Flows, enabling reactive programming patterns.
+ *
+ * Example usage:
+ * ```kotlin
+ * val repository: ReactivePreferencesRepository = ...
+ * repository.observePreference("theme", "light").collect { value -> println(value) }
+ * repository.observeAllKeys().collect { keys -> println(keys) }
+ * repository.observePreferenceChanges().collect { event -> println(event) }
+ * ```
+ */
+interface ReactivePreferencesRepository : PreferencesRepository {
+    /**
+     * Observes the value for the specified key as a [Flow], emitting updates as they occur.
+     *
+     * @param key The key to observe.
+     * @param default The default value to emit if the key does not exist.
+     * @return A [Flow] emitting the value for the key.
+     */
+    fun <T> observePreference(key: String, default: T): Flow<T>
+
+    /**
+     * Observes a serializable value for the specified key as a [Flow].
+     *
+     * @param key The key to observe.
+     * @param default The default value to emit if the key does not exist.
+     * @param serializer The serializer for the value type.
+     * @return A [Flow] emitting the value for the key.
+     */
+    fun <T> observeSerializablePreference(
+        key: String,
+        default: T,
+        serializer: KSerializer<T>,
+    ): Flow<T>
+
+    /**
+     * Observes all keys in the preferences as a [Flow], emitting updates as they occur.
+     *
+     * @return A [Flow] emitting the set of all keys.
+     */
+    fun observeAllKeys(): Flow<Set<String>>
+
+    /**
+     * Observes the number of preferences as a [Flow], emitting updates as they occur.
+     *
+     * @return A [Flow] emitting the number of key-value pairs in the preferences.
+     */
+    fun observePreferenceCount(): Flow<Int>
+
+    /**
+     * Observes all change events in the preferences as a [Flow].
+     *
+     * @return A [Flow] emitting [DataStoreChangeEvent] instances as changes occur.
+     */
+    fun observePreferenceChanges(): Flow<DataStoreChangeEvent>
+
+    /**
+     * Observes change events for a specific key as a [Flow].
+     *
+     * @param key The key to observe for changes.
+     * @return A [Flow] emitting [DataStoreChangeEvent] instances related to the specified key.
+     */
+    fun observePreferenceChanges(key: String): Flow<DataStoreChangeEvent>
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/serialization/JsonSerializationStrategy.kt

@@ -0,0 +1,109 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.serialization
+
+import kotlinx.serialization.KSerializer
+import kotlinx.serialization.json.Json
+import template.core.base.datastore.exceptions.DeserializationException
+import template.core.base.datastore.exceptions.SerializationException
+
+/**
+ * Implementation of [SerializationStrategy] that uses kotlinx.serialization's [Json]
+ * for serializing and deserializing data.
+ *
+ * This strategy provides a convenient way to store and retrieve complex data objects in the
+ * data store by converting them to and from JSON strings.
+ *
+ * Example usage:
+ * ```kotlin
+ * // Define a serializable data class
+ * @Serializable
+ * data class Settings(val theme: String, val fontSize: Int)
+ *
+ * // Create a JsonSerializationStrategy instance
+ * val serializationStrategy = JsonSerializationStrategy()
+ * val settingsSerializer = Settings.serializer()
+ *
+ * // Serialize an object
+ * val settings = Settings("dark", 14)
+ * val serializedData = serializationStrategy.serialize(settings, settingsSerializer)
+ * println("Serialized data: $serializedData")
+ * // Example output: Result.success("{"theme":"dark","fontSize":14}")
+ *
+ * // Deserialize a string
+ * val dataString = "{"theme":"light","fontSize":12}"
+ * val deserializedSettings = serializationStrategy.deserialize(dataString, settingsSerializer)
+ * println("Deserialized settings: $deserializedSettings")
+ * // Example output: Result.success(Settings(theme=light, fontSize=12))
+ * ```
+ *
+ * @property json The [Json] instance used for serialization and deserialization.
+ * Configurable with default lenient settings.
+ */
+class JsonSerializationStrategy(
+    private val json: Json = Json {
+        ignoreUnknownKeys = true
+        encodeDefaults = true
+        isLenient = true
+    },
+) : SerializationStrategy {
+
+    /**
+     * Serializes the given [value] of type [T] to a JSON [String] using the provided [serializer]
+     * and the configured [Json] instance.
+     *
+     * @param value The object to serialize.
+     * @param serializer The [KSerializer] for type [T].
+     * @return A [Result.success] containing the JSON string, or [Result.failure]
+     * if serialization fails (e.g., due to serialization errors).
+     */
+    override suspend fun <T> serialize(value: T, serializer: KSerializer<T>): Result<String> {
+        return try {
+            val result = json.encodeToString(serializer, value)
+            Result.success(result)
+        } catch (e: Exception) {
+            Result.failure(
+                SerializationException(
+                    "Failed to serialize value of type ${value?.let { it::class.simpleName }}",
+                    e,
+                ),
+            )
+        }
+    }
+
+    /**
+     * Deserializes the given JSON [data] string back into an object of type [T] using
+     * the provided [serializer] and the configured [Json] instance.
+     *
+     * @param data The JSON string data to deserialize.
+     * @param serializer The [KSerializer] for type [T].
+     * @return A [Result.success] containing the deserialized object, or [Result.failure] if
+     * deserialization fails (e.g., due to invalid JSON format or deserialization errors).
+     */
+    override suspend fun <T> deserialize(data: String, serializer: KSerializer<T>): Result<T> {
+        return try {
+            if (data.isBlank()) {
+                return Result.failure(
+                    DeserializationException("Cannot deserialize blank string"),
+                )
+            }
+
+            val result = json.decodeFromString(serializer, data)
+            Result.success(result)
+        } catch (e: Exception) {
+            Result.failure(
+                DeserializationException(
+                    "Failed to deserialize data: ${data.take(100)}${if (data.length > 100) "..." else ""}",
+                    e,
+                ),
+            )
+        }
+    }
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/serialization/SerializationStrategy.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.serialization
+
+import kotlinx.serialization.KSerializer
+
+/**
+ * Strategy for handling serialization operations.
+ * Follows Single Responsibility Principle.
+ */
+interface SerializationStrategy {
+    suspend fun <T> serialize(value: T, serializer: KSerializer<T>): Result<String>
+    suspend fun <T> deserialize(data: String, serializer: KSerializer<T>): Result<T>
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/store/BasicPreferencesStore.kt

@@ -0,0 +1,208 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.store
+
+import com.russhwolf.settings.ExperimentalSettingsApi
+import com.russhwolf.settings.Settings
+import com.russhwolf.settings.serialization.decodeValue
+import com.russhwolf.settings.serialization.encodeValue
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.withContext
+import kotlinx.serialization.ExperimentalSerializationApi
+import kotlinx.serialization.KSerializer
+
+/**
+ * Basic implementation of a user preferences data store using a settings storage mechanism.
+ *
+ * This class is deprecated. Use [ReactiveUserPreferencesDataStore]
+ * via [template.core.base.datastore.factory.DataStoreFactory] for advanced features such
+ * as reactive flows, caching, and validation.
+ *
+ * Example migration:
+ * ```kotlin
+ * // Old way
+ * val dataStore = BasicPreferencesStore(settings, dispatcher)
+ *
+ * // New way
+ * val repository = DataStoreFactory.create(settings, dispatcher)
+ * ```
+ *
+ * @property settings The underlying settings storage implementation.
+ * @property dispatcher The coroutine dispatcher for executing operations.
+ */
+@Deprecated(
+    message = "Use ReactiveUserPreferencesRepository through DataStoreFactory instead",
+    replaceWith = ReplaceWith(
+        "DataStoreFactory.create(settings, dispatcher)",
+        "template.core.base.datastore.factory.DataStoreFactory",
+    ),
+    level = DeprecationLevel.WARNING,
+)
+class BasicPreferencesStore(
+    private val settings: Settings,
+    private val dispatcher: CoroutineDispatcher,
+) {
+
+    /**
+     * Stores a value associated with the specified key in the data store.
+     * Supports primitive types directly and custom types via a provided [KSerializer].
+     *
+     * @param key The key to associate with the value.
+     * @param value The value to store.
+     * @param serializer The serializer for the value type, if needed.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.putValue("theme", "dark")
+     * ```
+     */
+    @OptIn(ExperimentalSerializationApi::class, ExperimentalSettingsApi::class)
+    suspend fun <T> putValue(
+        key: String,
+        value: T,
+        serializer: KSerializer<T>? = null,
+    ): Result<Unit> = withContext(dispatcher) {
+        runCatching {
+            when (value) {
+                is Int -> settings.putInt(key, value)
+                is Long -> settings.putLong(key, value)
+                is Float -> settings.putFloat(key, value)
+                is Double -> settings.putDouble(key, value)
+                is String -> settings.putString(key, value)
+                is Boolean -> settings.putBoolean(key, value)
+                else -> {
+                    require(serializer != null) {
+                        "Unsupported type or no serializer provided for ${value?.let { it::class } ?: "null"}"
+                    }
+                    settings.encodeValue(
+                        serializer = serializer,
+                        value = value,
+                        key = key,
+                    )
+                }
+            }
+        }
+    }
+
+    /**
+     * Retrieves a value associated with the specified key from the data store.
+     *
+     * @param key The key to retrieve.
+     * @param default The default value to return if the key does not exist.
+     * @param serializer The serializer for the value type, if needed.
+     * @return [Result.success] with the value, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.getValue("theme", "light")
+     * ```
+     */
+    @Suppress("UNCHECKED_CAST")
+    @OptIn(ExperimentalSerializationApi::class, ExperimentalSettingsApi::class)
+    suspend fun <T> getValue(
+        key: String,
+        default: T,
+        serializer: KSerializer<T>? = null,
+    ): Result<T> = withContext(dispatcher) {
+        runCatching {
+            when (default) {
+                is Int -> settings.getInt(key, default) as T
+                is Long -> settings.getLong(key, default) as T
+                is Float -> settings.getFloat(key, default) as T
+                is Double -> settings.getDouble(key, default) as T
+                is String -> settings.getString(key, default) as T
+                is Boolean -> settings.getBoolean(key, default) as T
+                else -> {
+                    require(serializer != null) {
+                        "Unsupported type or no serializer provided for ${default?.let { it::class } ?: "null"}"
+                    }
+                    settings.decodeValue(
+                        serializer = serializer,
+                        key = key,
+                        defaultValue = default,
+                    )
+                }
+            }
+        }
+    }
+
+    /**
+     * Checks if the specified key exists in the data store.
+     *
+     * @param key The key to check.
+     * @return [Result.success] with true if the key exists, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.hasKey("theme")
+     * ```
+     */
+    suspend fun hasKey(key: String): Result<Boolean> = withContext(dispatcher) {
+        runCatching { settings.hasKey(key) }
+    }
+
+    /**
+     * Removes the value associated with the specified key from the data store.
+     *
+     * @param key The key to remove.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.removeValue("theme")
+     * ```
+     */
+    suspend fun removeValue(key: String): Result<Unit> = withContext(dispatcher) {
+        runCatching { settings.remove(key) }
+    }
+
+    /**
+     * Clears all stored preferences in the data store.
+     *
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.clearAll()
+     * ```
+     */
+    suspend fun clearAll(): Result<Unit> = withContext(dispatcher) {
+        runCatching { settings.clear() }
+    }
+
+    /**
+     * Retrieves all keys currently stored in the data store.
+     *
+     * @return [Result.success] with the set of keys, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.getAllKeys()
+     * ```
+     */
+    suspend fun getAllKeys(): Result<Set<String>> = withContext(dispatcher) {
+        runCatching { settings.keys }
+    }
+
+    /**
+     * Returns the total number of key-value pairs stored in the data store.
+     *
+     * @return [Result.success] with the count, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.getSize()
+     * ```
+     */
+    suspend fun getSize(): Result<Int> = withContext(dispatcher) {
+        runCatching { settings.size }
+    }
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/store/CachedPreferencesStore.kt

@@ -0,0 +1,371 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.store
+
+import com.russhwolf.settings.Settings
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.withContext
+import kotlinx.serialization.KSerializer
+import template.core.base.datastore.cache.CacheManager
+import template.core.base.datastore.contracts.CacheableDataStore
+import template.core.base.datastore.exceptions.CacheException
+import template.core.base.datastore.exceptions.UnsupportedTypeException
+import template.core.base.datastore.handlers.TypeHandler
+import template.core.base.datastore.serialization.SerializationStrategy
+import template.core.base.datastore.validation.PreferencesValidator
+
+/**
+ * Implementation of a cache-enabled user preferences data store.
+ *
+ * This class provides coroutine-based, type-safe, and observable access to user preferences,
+ * supporting both primitive and serializable types, with in-memory caching for improved performance.
+ *
+ * Example usage:
+ * ```kotlin
+ * val store = CachedPreferencesStore(
+ *     settings = Settings(),
+ *     dispatcher = Dispatchers.IO,
+ *     typeHandlers = listOf(IntTypeHandler(), StringTypeHandler()),
+ *     serializationStrategy = JsonSerializationStrategy(),
+ *     validator = DefaultPreferencesValidator(),
+ *     cacheManager = LruCacheManager(200)
+ * )
+ * ```
+ *
+ * @property settings The underlying settings storage implementation.
+ * @property dispatcher The coroutine dispatcher for executing operations.
+ * @property typeHandlers The list of type handlers for supported types.
+ * @property serializationStrategy The strategy for serializing and deserializing values.
+ * @property validator The validator for keys and values.
+ * @property cacheManager The cache manager for in-memory caching.
+ */
+@Suppress("MaxLineLength")
+class CachedPreferencesStore(
+    private val settings: Settings,
+    private val dispatcher: CoroutineDispatcher,
+    private val typeHandlers: List<TypeHandler<Any>>,
+    private val serializationStrategy: SerializationStrategy,
+    private val validator: PreferencesValidator,
+    private val cacheManager: CacheManager<String, Any>,
+) : CacheableDataStore {
+
+    /**
+     * Stores a value associated with the specified key in the data store.
+     *
+     * @param key The key to associate with the value.
+     * @param value The value to store.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * store.putValue("theme", "dark")
+     * ```
+     */
+    override suspend fun <T> putValue(key: String, value: T): Result<Unit> =
+        withContext(dispatcher) {
+            runCatching {
+                // Validate inputs
+                validator.validateKey(key).getOrThrow()
+                validator.validateValue(value).getOrThrow()
+
+                // Find and use type handler
+                val handler = findTypeHandler(value) ?: throw UnsupportedTypeException(
+                    "No handler found for type: ${value?.let { it::class.simpleName } ?: "null"}",
+                )
+
+                @Suppress("UNCHECKED_CAST")
+                val typedHandler = handler as TypeHandler<T>
+                val result = typedHandler.put(settings, key, value)
+
+                if (result.isSuccess) {
+                    cacheValue(key, value as Any)
+                }
+
+                result.getOrThrow()
+            }
+        }
+
+    /**
+     * Retrieves a value associated with the specified key from the data store.
+     *
+     * @param key The key to retrieve.
+     * @param default The default value to return if the key does not exist.
+     * @return [Result.success] with the value, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * store.getValue("theme", "light")
+     * ```
+     */
+    override suspend fun <T> getValue(key: String, default: T): Result<T> =
+        withContext(dispatcher) {
+            runCatching {
+                validator.validateKey(key).getOrThrow()
+
+                // Check cache first
+                getCachedValue<T>(key)?.let { return@runCatching it }
+
+                // Find and use type handler
+                val handler = findTypeHandler(default)
+                    ?: throw UnsupportedTypeException(
+                        "No handler found for type: ${default?.let { it::class.simpleName } ?: "null"}",
+                    )
+
+                @Suppress("UNCHECKED_CAST")
+                val typedHandler = handler as TypeHandler<T>
+                val result = typedHandler.get(settings, key, default)
+
+                if (result.isSuccess) {
+                    cacheValue(key, result.getOrThrow() as Any)
+                }
+
+                result.getOrThrow()
+            }
+        }
+
+    /**
+     * Stores a serializable value using the provided serializer.
+     *
+     * @param key The key to associate with the value.
+     * @param value The value to store.
+     * @param serializer The serializer for the value type.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * store.putSerializableValue("user", user, User.serializer())
+     * ```
+     */
+    override suspend fun <T> putSerializableValue(
+        key: String,
+        value: T,
+        serializer: KSerializer<T>,
+    ): Result<Unit> = withContext(dispatcher) {
+        runCatching {
+            validator.validateKey(key).getOrThrow()
+            validator.validateValue(value).getOrThrow()
+
+            val serializedResult = serializationStrategy.serialize(value, serializer)
+            serializedResult.fold(
+                onSuccess = { serializedData ->
+                    val result = runCatching { settings.putString(key, serializedData) }
+                    if (result.isSuccess) {
+                        cacheValue(key, value as Any)
+                    }
+                    result.getOrThrow()
+                },
+                onFailure = { throw it },
+            )
+        }
+    }
+
+    /**
+     * Retrieves a serializable value using the provided serializer.
+     *
+     * @param key The key to retrieve.
+     * @param default The default value to return if the key does not exist.
+     * @param serializer The serializer for the value type.
+     * @return [Result.success] with the value, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * store.getSerializableValue("user", defaultUser, User.serializer())
+     * ```
+     */
+    override suspend fun <T> getSerializableValue(
+        key: String,
+        default: T,
+        serializer: KSerializer<T>,
+    ): Result<T> = withContext(dispatcher) {
+        runCatching {
+            validator.validateKey(key).getOrThrow()
+
+            // Check cache first
+            getCachedValue<T>(key)?.let { return@runCatching it }
+
+            if (!settings.hasKey(key)) {
+                cacheValue(key, default as Any)
+                return@runCatching default
+            }
+
+            val serializedData = runCatching { settings.getString(key, "") }
+                .getOrElse { throw it }
+
+            if (serializedData.isEmpty()) {
+                return@runCatching default
+            }
+
+            serializationStrategy.deserialize(serializedData, serializer).fold(
+                onSuccess = { value ->
+                    cacheValue(key, value as Any)
+                    value
+                },
+                onFailure = {
+                    // Return default on deserialization failure but don't cache it
+                    default
+                },
+            )
+        }
+    }
+
+    /**
+     * Checks if the specified key exists in the data store or cache.
+     *
+     * @param key The key to check.
+     * @return [Result.success] with true if the key exists, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * store.hasKey("theme")
+     * ```
+     */
+    override suspend fun hasKey(key: String): Result<Boolean> = withContext(dispatcher) {
+        runCatching {
+            validator.validateKey(key).getOrThrow()
+            settings.hasKey(key) || cacheManager.containsKey(key)
+        }
+    }
+
+    /**
+     * Removes the value associated with the specified key from the data store and cache.
+     *
+     * @param key The key to remove.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * store.removeValue("theme")
+     * ```
+     */
+    override suspend fun removeValue(key: String): Result<Unit> = withContext(dispatcher) {
+        runCatching {
+            validator.validateKey(key).getOrThrow()
+            settings.remove(key)
+            cacheManager.remove(key)
+            Unit
+        }
+    }
+
+    /**
+     * Clears all stored preferences in the data store and cache.
+     *
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * store.clearAll()
+     * ```
+     */
+    override suspend fun clearAll(): Result<Unit> = withContext(dispatcher) {
+        runCatching {
+            settings.clear()
+            cacheManager.clear()
+        }
+    }
+
+    /**
+     * Retrieves all keys currently stored in the data store.
+     *
+     * @return [Result.success] with the set of keys, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * store.getAllKeys()
+     * ```
+     */
+    override suspend fun getAllKeys(): Result<Set<String>> = withContext(dispatcher) {
+        runCatching { settings.keys }
+    }
+
+    /**
+     * Retrieves the total number of key-value pairs stored in the data store.
+     *
+     * @return [Result.success] with the count, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * store.getSize()
+     * ```
+     */
+    override suspend fun getSize(): Result<Int> = withContext(dispatcher) {
+        runCatching { settings.size }
+    }
+
+    /**
+     * Invalidates the cache for the specified key.
+     *
+     * @param key The key whose cache should be invalidated.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * store.invalidateCache("theme")
+     * ```
+     */
+    override suspend fun invalidateCache(key: String): Result<Unit> = withContext(dispatcher) {
+        runCatching {
+            validator.validateKey(key).getOrThrow()
+            cacheManager.remove(key)
+            Unit
+        }
+    }
+
+    /**
+     * Invalidates all cache entries in the data store.
+     *
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * store.invalidateAllCache()
+     * ```
+     */
+    override suspend fun invalidateAllCache(): Result<Unit> = withContext(dispatcher) {
+        runCatching {
+            cacheManager.clear()
+        }
+    }
+
+    /**
+     * Returns the current size of the cache.
+     *
+     * @return The number of entries in the cache.
+     *
+     * Example usage:
+     * ```kotlin
+     * val cacheSize = store.getCacheSize()
+     * ```
+     */
+    override fun getCacheSize(): Int = cacheManager.size()
+
+    // Private helper methods to reduce duplication
+    private fun findTypeHandler(value: Any?): TypeHandler<Any>? {
+        return typeHandlers.find { it.canHandle(value) }
+    }
+
+    @Suppress("UNCHECKED_CAST")
+    private fun <T> getCachedValue(key: String): T? {
+        return try {
+            cacheManager.get(key) as? T
+        } catch (_: Exception) {
+            // Log cache retrieval error but don't fail the operation
+            null
+        }
+    }
+
+    private fun cacheValue(key: String, value: Any) {
+        try {
+            cacheManager.put(key, value)
+        } catch (e: Exception) {
+            // Cache operation failed - log but don't fail the main operation
+            throw CacheException("Failed to cache value for key: $key", e)
+        }
+    }
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/store/ReactiveUserPreferencesDataStore.kt

@@ -0,0 +1,414 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.store
+
+import com.russhwolf.settings.Settings
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.onStart
+import kotlinx.coroutines.withContext
+import kotlinx.serialization.KSerializer
+import template.core.base.datastore.cache.CacheManager
+import template.core.base.datastore.contracts.DataStoreChangeEvent
+import template.core.base.datastore.contracts.ReactiveDataStore
+import template.core.base.datastore.handlers.TypeHandler
+import template.core.base.datastore.reactive.ChangeNotifier
+import template.core.base.datastore.reactive.ValueObserver
+import template.core.base.datastore.serialization.SerializationStrategy
+import template.core.base.datastore.validation.PreferencesValidator
+
+/**
+ * Reactive implementation of a user preferences data store with support for caching,
+ * validation, and change notifications.
+ *
+ * This class provides coroutine-based, type-safe, and observable access to user preferences,
+ * supporting both primitive and serializable types.
+ *
+ * Example usage:
+ * ```kotlin
+ * val dataStore = ReactiveUserPreferencesDataStore(
+ *     settings = Settings(),
+ *     dispatcher = Dispatchers.IO,
+ *     typeHandlers = listOf(IntTypeHandler(), StringTypeHandler()),
+ *     serializationStrategy = JsonSerializationStrategy(),
+ *     validator = DefaultPreferencesValidator(),
+ *     cacheManager = LruCacheManager(200),
+ *     changeNotifier = DefaultChangeNotifier(),
+ *     valueObserver = DefaultValueObserver(DefaultChangeNotifier())
+ * )
+ * ```
+ *
+ * @property settings The underlying settings storage implementation.
+ * @property dispatcher The coroutine dispatcher for executing operations.
+ * @property typeHandlers The list of type handlers for supported types.
+ * @property serializationStrategy The strategy for serializing and deserializing values.
+ * @property validator The validator for keys and values.
+ * @property cacheManager The cache manager for in-memory caching.
+ * @property changeNotifier The notifier for broadcasting change events.
+ * @property valueObserver The observer for value changes.
+ */
+class ReactiveUserPreferencesDataStore(
+    private val settings: Settings,
+    private val dispatcher: CoroutineDispatcher,
+    private val typeHandlers: List<TypeHandler<Any>>,
+    private val serializationStrategy: SerializationStrategy,
+    private val validator: PreferencesValidator,
+    private val cacheManager: CacheManager<String, Any>,
+    private val changeNotifier: ChangeNotifier,
+    private val valueObserver: ValueObserver,
+) : ReactiveDataStore {
+
+    // Delegate to the base enhanced implementation
+    private val enhancedDataStore = CachedPreferencesStore(
+        settings,
+        dispatcher,
+        typeHandlers,
+        serializationStrategy,
+        validator,
+        cacheManager,
+    )
+
+    /**
+     * Stores a value associated with the specified key in the data store.
+     *
+     * @param key The key to associate with the value.
+     * @param value The value to store.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.putValue("theme", "dark")
+     * ```
+     */
+    override suspend fun <T> putValue(key: String, value: T): Result<Unit> {
+        return withContext(dispatcher) {
+            val oldValue = if (hasKey(key).getOrDefault(false)) {
+                enhancedDataStore.getValue(key, value).getOrNull()
+            } else {
+                null
+            }
+
+            val result = enhancedDataStore.putValue(key, value)
+
+            if (result.isSuccess) {
+                val change = if (oldValue != null) {
+                    DataStoreChangeEvent.ValueUpdated(key, oldValue, value)
+                } else {
+                    DataStoreChangeEvent.ValueAdded(key, value)
+                }
+                changeNotifier.notifyChange(change)
+            }
+
+            result
+        }
+    }
+
+    /**
+     * Retrieves a value associated with the specified key from the data store.
+     *
+     * @param key The key to retrieve.
+     * @param default The default value to return if the key does not exist.
+     * @return [Result.success] with the value, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.getValue("theme", "light")
+     * ```
+     */
+    override suspend fun <T> getValue(key: String, default: T): Result<T> {
+        return enhancedDataStore.getValue(key, default)
+    }
+
+    /**
+     * Stores a serializable value using the provided serializer.
+     *
+     * @param key The key to associate with the value.
+     * @param value The value to store.
+     * @param serializer The serializer for the value type.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.putSerializableValue("user", user, User.serializer())
+     * ```
+     */
+    override suspend fun <T> putSerializableValue(
+        key: String,
+        value: T,
+        serializer: KSerializer<T>,
+    ): Result<Unit> {
+        return withContext(dispatcher) {
+            val oldValue = if (hasKey(key).getOrDefault(false)) {
+                enhancedDataStore.getSerializableValue(key, value, serializer).getOrNull()
+            } else {
+                null
+            }
+
+            val result = enhancedDataStore.putSerializableValue(key, value, serializer)
+
+            if (result.isSuccess) {
+                val change = if (oldValue != null) {
+                    DataStoreChangeEvent.ValueUpdated(key, oldValue, value)
+                } else {
+                    DataStoreChangeEvent.ValueAdded(key, value)
+                }
+                changeNotifier.notifyChange(change)
+            }
+
+            result
+        }
+    }
+
+    /**
+     * Retrieves a serializable value using the provided serializer.
+     *
+     * @param key The key to retrieve.
+     * @param default The default value to return if the key does not exist.
+     * @param serializer The serializer for the value type.
+     * @return [Result.success] with the value, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.getSerializableValue("user", defaultUser, User.serializer())
+     * ```
+     */
+    override suspend fun <T> getSerializableValue(
+        key: String,
+        default: T,
+        serializer: KSerializer<T>,
+    ): Result<T> {
+        return enhancedDataStore.getSerializableValue(key, default, serializer)
+    }
+
+    /**
+     * Removes the value associated with the specified key from the data store.
+     *
+     * @param key The key to remove.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.removeValue("theme")
+     * ```
+     */
+    override suspend fun removeValue(key: String): Result<Unit> {
+        return withContext(dispatcher) {
+            val oldValue = if (hasKey(key).getOrDefault(false)) {
+                runCatching { settings.getString(key, "") }.getOrNull()
+            } else {
+                null
+            }
+
+            val result = enhancedDataStore.removeValue(key)
+
+            if (result.isSuccess) {
+                changeNotifier.notifyChange(
+                    DataStoreChangeEvent.ValueRemoved(key, oldValue),
+                )
+            }
+
+            result
+        }
+    }
+
+    /**
+     * Clears all stored preferences in the data store.
+     *
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.clearAll()
+     * ```
+     */
+    override suspend fun clearAll(): Result<Unit> {
+        return withContext(dispatcher) {
+            val result = enhancedDataStore.clearAll()
+
+            if (result.isSuccess) {
+                changeNotifier.notifyChange(DataStoreChangeEvent.StoreCleared())
+            }
+
+            result
+        }
+    }
+
+    /**
+     * Observes the value for the specified key as a flow, emitting updates as they occur.
+     *
+     * @param key The key to observe.
+     * @param default The default value to emit if the key does not exist.
+     * @return A [Flow] emitting the value for the key.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.observeValue("theme", "light").collect { value -> println(value) }
+     * ```
+     */
+    override fun <T> observeValue(key: String, default: T): Flow<T> {
+        return valueObserver.createDistinctValueFlow(key, default) {
+            enhancedDataStore.getValue(key, default)
+        }
+    }
+
+    /**
+     * Observes a serializable value for the specified key as a flow.
+     *
+     * @param key The key to observe.
+     * @param default The default value to emit if the key does not exist.
+     * @param serializer The serializer for the value type.
+     * @return A [Flow] emitting the value for the key.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore
+     *  .observeSerializableValue("user", defaultUser, User.serializer())
+     *  .collect { user -> println(user) }
+     * ```
+     */
+    override fun <T> observeSerializableValue(
+        key: String,
+        default: T,
+        serializer: KSerializer<T>,
+    ): Flow<T> {
+        return valueObserver.createDistinctValueFlow(key, default) {
+            enhancedDataStore.getSerializableValue(key, default, serializer)
+        }
+    }
+
+    /**
+     * Observes all keys in the data store as a flow, emitting updates as they occur.
+     *
+     * @return A [Flow] emitting the set of all keys.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.observeKeys().collect { keys -> println(keys) }
+     * ```
+     */
+    override fun observeKeys(): Flow<Set<String>> {
+        return changeNotifier.observeChanges()
+            .onStart { emit(DataStoreChangeEvent.ValueAdded("", null)) } // Trigger initial emission
+            .map { settings.keys }
+    }
+
+    /**
+     * Observes the size of the data store as a flow, emitting updates as they occur.
+     *
+     * @return A [Flow] emitting the number of key-value pairs in the data store.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.observeSize().collect { size -> println(size) }
+     * ```
+     */
+    override fun observeSize(): Flow<Int> {
+        return changeNotifier.observeChanges()
+            .onStart { emit(DataStoreChangeEvent.ValueAdded("", null)) } // Trigger initial emission
+            .map { getSize().getOrDefault(0) }
+            .distinctUntilChanged()
+    }
+
+    /**
+     * Observes all change events in the data store as a flow.
+     *
+     * @return A [Flow] emitting [DataStoreChangeEvent] instances as changes occur.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.observeChanges().collect { event -> println(event) }
+     * ```
+     */
+    override fun observeChanges(): Flow<DataStoreChangeEvent> {
+        return changeNotifier.observeChanges()
+    }
+
+    /**
+     * Checks if the specified key exists in the data store.
+     *
+     * @param key The key to check.
+     * @return [Result.success] with true if the key exists, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.hasKey("theme")
+     * ```
+     */
+    override suspend fun hasKey(key: String): Result<Boolean> = enhancedDataStore.hasKey(key)
+
+    /**
+     * Retrieves all keys currently stored in the data store.
+     *
+     * @return [Result.success] with the set of keys, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.getAllKeys()
+     * ```
+     */
+    override suspend fun getAllKeys(): Result<Set<String>> = enhancedDataStore.getAllKeys()
+
+    /**
+     * Retrieves the total number of key-value pairs stored in the data store.
+     *
+     * @return [Result.success] with the count, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.getSize()
+     * ```
+     */
+    override suspend fun getSize(): Result<Int> = enhancedDataStore.getSize()
+
+    /**
+     * Invalidates the cache entry for the specified key.
+     *
+     * This forces the next retrieval for this key to read from the underlying data store.
+     *
+     * @param key The key whose cache entry should be invalidated.
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.invalidateCache("user_preferences")
+     * ```
+     */
+    override suspend fun invalidateCache(key: String): Result<Unit> =
+        enhancedDataStore.invalidateCache(key)
+
+    /**
+     * Invalidates all entries in the cache.
+     *
+     * This forces the next retrieval for any key to read from the underlying data store.
+     *
+     * @return [Result.success] if the operation succeeds, or [Result.failure] if an error occurs.
+     *
+     * Example usage:
+     * ```kotlin
+     * dataStore.invalidateAllCache()
+     * ```
+     */
+    override suspend fun invalidateAllCache(): Result<Unit> = enhancedDataStore.invalidateAllCache()
+
+    /**
+     * Returns the current number of entries in the cache.
+     *
+     * @return The size of the cache.
+     *
+     * Example usage:
+     * ```kotlin
+     * val cacheSize = dataStore.getCacheSize()
+     * println("Cache contains $cacheSize entries")
+     * ```
+     */
+    override fun getCacheSize(): Int = enhancedDataStore.getCacheSize()
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/validation/DefaultPreferencesValidator.kt

@@ -0,0 +1,71 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.validation
+
+import template.core.base.datastore.exceptions.InvalidKeyException
+
+/**
+ * Default implementation of [PreferencesValidator] for validating keys and values in the data store.
+ *
+ * This implementation enforces constraints such as non-blank keys, maximum key length, and value size limits.
+ *
+ * Example usage:
+ * ```kotlin
+ * val validator = DefaultPreferencesValidator()
+ * validator.validateKey("theme")
+ * validator.validateValue("dark")
+ * ```
+ */
+class DefaultPreferencesValidator : PreferencesValidator {
+
+    /**
+     * {@inheritDoc}
+     */
+    override fun validateKey(key: String): Result<Unit> {
+        return when {
+            key.isBlank() -> Result.failure(
+                InvalidKeyException("Key cannot be blank"),
+            )
+
+            key.length > 255 -> Result.failure(
+                InvalidKeyException("Key length cannot exceed 255 characters: '$key'"),
+            )
+
+            key.contains('\u0000') -> Result.failure(
+                InvalidKeyException("Key cannot contain null characters: '$key'"),
+            )
+
+            else -> Result.success(Unit)
+        }
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    override fun <T> validateValue(value: T): Result<Unit> {
+        return when (value) {
+            null -> Result.failure(
+                IllegalArgumentException("Value cannot be null"),
+            )
+
+            is String -> {
+                if (value.length > 10000) {
+                    Result.failure(
+                        IllegalArgumentException("String value too large: ${value.length} characters"),
+                    )
+                } else {
+                    Result.success(Unit)
+                }
+            }
+
+            else -> Result.success(Unit)
+        }
+    }
+}

core-base/datastore/src/commonMain/kotlin/template/core/base/datastore/validation/PreferencesValidator.kt

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.validation
+
+/**
+ * Interface for validating keys and values used in the data store.
+ *
+ * Implementations of this interface provide validation logic to ensure that keys and values meet
+ * required constraints before being stored or retrieved.
+ *
+ * Example usage:
+ * ```kotlin
+ * val validator: PreferencesValidator = DefaultPreferencesValidator()
+ * validator.validateKey("theme")
+ * validator.validateValue("dark")
+ * ```
+ */
+interface PreferencesValidator {
+    /**
+     * Validates the provided key for use in the data store.
+     *
+     * @param key The key to validate.
+     * @return [Result.success] if the key is valid, or [Result.failure] with an exception if invalid.
+     */
+    fun validateKey(key: String): Result<Unit>
+
+    /**
+     * Validates the provided value for use in the data store.
+     *
+     * @param value The value to validate.
+     * @return [Result.success] if the value is valid, or [Result.failure] with an exception if invalid.
+     */
+    fun <T> validateValue(value: T): Result<Unit>
+}

core-base/datastore/src/commonTest/kotlin/template/core/base/datastore/DataStoreComprehensiveFeatureTest.kt

@@ -0,0 +1,872 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore
+
+import app.cash.turbine.test
+import com.russhwolf.settings.MapSettings
+import com.russhwolf.settings.Settings
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.test.StandardTestDispatcher
+import kotlinx.coroutines.test.advanceUntilIdle
+import kotlinx.coroutines.test.runTest
+import kotlinx.datetime.Clock.System
+import kotlinx.serialization.Serializable
+import org.koin.core.context.startKoin
+import org.koin.core.context.stopKoin
+import org.koin.core.qualifier.named
+import org.koin.dsl.module
+import org.koin.test.KoinTest
+import org.koin.test.inject
+import template.core.base.datastore.cache.LruCacheManager
+import template.core.base.datastore.contracts.DataStoreChangeEvent
+import template.core.base.datastore.di.CoreDatastoreModule
+import template.core.base.datastore.extensions.onlyAdditions
+import template.core.base.datastore.extensions.onlyRemovals
+import template.core.base.datastore.extensions.onlyUpdates
+import template.core.base.datastore.factory.DataStoreFactory
+import template.core.base.datastore.handlers.IntTypeHandler
+import template.core.base.datastore.reactive.PreferenceFlowOperators
+import template.core.base.datastore.repository.ReactivePreferencesRepository
+import template.core.base.datastore.serialization.JsonSerializationStrategy
+import template.core.base.datastore.validation.DefaultPreferencesValidator
+import kotlin.test.AfterTest
+import kotlin.test.BeforeTest
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertFalse
+import kotlin.test.assertNull
+import kotlin.test.assertTrue
+import kotlin.time.measureTime
+
+/**
+ * Comprehensive feature test for the Core DataStore Module.
+ * Tests all functionality including basic operations, reactive features,
+ * caching, serialization, validation, and performance characteristics.
+ */
+@ExperimentalCoroutinesApi
+class DataStoreComprehensiveFeatureTest : KoinTest {
+
+    private val testDispatcher = StandardTestDispatcher()
+    private val repository: ReactivePreferencesRepository by inject()
+    private val operators: PreferenceFlowOperators by inject()
+
+    // Test data models
+    @Serializable
+    data class UserProfile(
+        val id: Long = 0,
+        val name: String = "",
+        val email: String = "",
+        val age: Int = 0,
+        val isActive: Boolean = true,
+        val preferences: UserPreferences = UserPreferences(),
+    )
+
+    @Serializable
+    data class UserPreferences(
+        val theme: String = "light",
+        val language: String = "en",
+        val notifications: Boolean = true,
+        val fontSize: Float = 14.0f,
+        val autoSave: Boolean = true,
+    )
+
+    @Serializable
+    data class AppConfig(
+        val version: String,
+        val features: List<String>,
+        val settings: Map<String, String>,
+    )
+
+    @BeforeTest
+    fun setup() {
+        startKoin {
+            modules(
+                CoreDatastoreModule,
+                module {
+                    single<Settings> { MapSettings() }
+                    single<CoroutineDispatcher>(
+                        qualifier = named("IO"),
+                    ) { testDispatcher }
+                },
+            )
+        }
+    }
+
+    @AfterTest
+    fun tearDown() {
+        stopKoin()
+    }
+
+    /**
+     * Test 1: Basic DataStore Operations
+     * Tests fundamental CRUD operations for all primitive types
+     */
+    @Test
+    fun test01_BasicDataStoreOperations() = runTest(testDispatcher) {
+        println("=== Testing Basic DataStore Operations ===")
+
+        // Test all primitive types
+        val primitiveTests = mapOf(
+            "int_key" to 42,
+            "long_key" to 123456789L,
+            "float_key" to 3.14f,
+            "double_key" to 2.71828,
+            "string_key" to "Hello DataStore!",
+            "boolean_key" to true,
+        )
+
+        primitiveTests.forEach { (key, value) ->
+            println("Testing $key with value: $value")
+
+            // Save preference
+            val saveResult = repository.savePreference(key, value)
+            assertTrue(saveResult.isSuccess, "Failed to save $key")
+
+            // Retrieve preference
+            val retrieveResult = repository.getPreference(key, getDefaultForType(value))
+            assertTrue(retrieveResult.isSuccess, "Failed to retrieve $key")
+            assertEquals(value, retrieveResult.getOrThrow(), "Value mismatch for $key")
+
+            // Check if key exists
+            assertTrue(repository.hasPreference(key), "Key $key should exist")
+        }
+
+        // Test key retrieval
+        val allKeys = repository.observeAllKeys().first()
+        assertTrue(allKeys.containsAll(primitiveTests.keys), "Not all keys found")
+
+        println("✅ Basic operations test passed")
+    }
+
+    /**
+     * Test 2: Serializable Object Storage
+     * Tests complex object serialization and deserialization
+     */
+    @Test
+    fun test02_SerializableObjectStorage() = runTest(testDispatcher) {
+        println("=== Testing Serializable Object Storage ===")
+
+        // Test UserProfile storage
+        val userProfile = UserProfile(
+            id = 12345,
+            name = "John Doe",
+            email = "john.doe@example.com",
+            age = 30,
+            isActive = true,
+            preferences = UserPreferences(
+                theme = "dark",
+                language = "es",
+                notifications = false,
+                fontSize = 16.0f,
+                autoSave = true,
+            ),
+        )
+
+        // Save complex object
+        val saveResult = repository.saveSerializablePreference(
+            "user_profile",
+            userProfile,
+            UserProfile.serializer(),
+        )
+        assertTrue(saveResult.isSuccess, "Failed to save UserProfile")
+
+        // Retrieve complex object
+        val retrieveResult = repository.getSerializablePreference(
+            "user_profile",
+            UserProfile(),
+            UserProfile.serializer(),
+        )
+        assertTrue(retrieveResult.isSuccess, "Failed to retrieve UserProfile")
+        assertEquals(userProfile, retrieveResult.getOrThrow(), "UserProfile mismatch")
+
+        // Test AppConfig with collections
+        val appConfig = AppConfig(
+            version = "1.2.3",
+            features = listOf("feature1", "feature2", "feature3"),
+            settings = mapOf(
+                "timeout" to "30",
+                "retries" to "3",
+                "debug" to "false",
+            ),
+        )
+
+        val configSaveResult = repository.saveSerializablePreference(
+            "app_config",
+            appConfig,
+            AppConfig.serializer(),
+        )
+        assertTrue(configSaveResult.isSuccess, "Failed to save AppConfig")
+
+        val configRetrieveResult = repository.getSerializablePreference(
+            "app_config",
+            AppConfig("", emptyList(), emptyMap()),
+            AppConfig.serializer(),
+        )
+        assertTrue(configRetrieveResult.isSuccess, "Failed to retrieve AppConfig")
+        assertEquals(appConfig, configRetrieveResult.getOrThrow(), "AppConfig mismatch")
+
+        println("✅ Serializable object storage test passed")
+    }
+
+    /**
+     * Test 3: Reactive Functionality
+     * Tests reactive flows, change notifications, and observers
+     */
+    @Test
+    fun test03_ReactiveFunctionality() = runTest(testDispatcher) {
+        println("=== Testing Reactive Functionality ===")
+
+        // Test preference observation
+        repository.observePreference("reactive_key", "default").test {
+            // Initial value
+            assertEquals("default", awaitItem())
+
+            // Update value
+            repository.savePreference("reactive_key", "updated")
+            assertEquals("updated", awaitItem())
+
+            // Update again
+            repository.savePreference("reactive_key", "final")
+            assertEquals("final", awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+
+        // Test change notifications
+        repository.observePreferenceChanges().test {
+            // Add a new preference
+            repository.savePreference("change_test", "value1")
+            val addChange = awaitItem()
+            assertTrue(addChange is DataStoreChangeEvent.ValueAdded)
+            assertEquals("change_test", addChange.key)
+
+            // Update the preference
+            repository.savePreference("change_test", "value2")
+            val updateChange = awaitItem()
+            assertTrue(updateChange is DataStoreChangeEvent.ValueUpdated)
+            assertEquals("change_test", updateChange.key)
+            assertEquals("value1", updateChange.oldValue)
+            assertEquals("value2", updateChange.newValue)
+
+            // Remove the preference
+            repository.removePreference("change_test")
+            val removeChange = awaitItem()
+            assertTrue(removeChange is DataStoreChangeEvent.ValueRemoved)
+            assertEquals("change_test", removeChange.key)
+
+            cancelAndIgnoreRemainingEvents()
+        }
+
+        // Test serializable object observation
+        val defaultProfile = UserProfile()
+        repository.observeSerializablePreference(
+            "profile_reactive",
+            defaultProfile,
+            UserProfile.serializer(),
+        ).test {
+            assertEquals(defaultProfile, awaitItem())
+
+            val newProfile = UserProfile(id = 999, name = "Jane")
+            repository.saveSerializablePreference(
+                "profile_reactive",
+                newProfile,
+                UserProfile.serializer(),
+            )
+            assertEquals(newProfile, awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+
+        println("✅ Reactive functionality test passed")
+    }
+
+    /**
+     * Test 4: Preference Flow Operators
+     * Tests combining, mapping, and advanced flow operations
+     */
+    @Test
+    fun test04_PreferenceFlowOperators() = runTest(testDispatcher) {
+        println("=== Testing Preference Flow Operators ===")
+
+        // Test combining two preferences
+        operators.combinePreferences(
+            "username",
+            "",
+            "is_premium",
+            false,
+        ) { username, isPremium ->
+            "User: $username, Premium: $isPremium"
+        }.test {
+            assertEquals("User: , Premium: false", awaitItem())
+
+            repository.savePreference("username", "alice")
+            assertEquals("User: alice, Premium: false", awaitItem())
+
+            repository.savePreference("is_premium", true)
+            assertEquals("User: alice, Premium: true", awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+
+        // Test combining three preferences
+        operators.combinePreferences(
+            "theme",
+            "light",
+            "language",
+            "en",
+            "notifications",
+            true,
+        ) { theme, lang, notifs ->
+            Triple(theme, lang, notifs)
+        }.test {
+            assertEquals(Triple("light", "en", true), awaitItem())
+
+            repository.savePreference("theme", "dark")
+            assertEquals(Triple("dark", "en", true), awaitItem())
+
+            repository.savePreference("language", "es")
+            assertEquals(Triple("dark", "es", true), awaitItem())
+
+            repository.savePreference("notifications", false)
+            assertEquals(Triple("dark", "es", false), awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+
+        // Test mapped preference observation
+        operators.observeMappedPreference("counter", 0) { count ->
+            "Count: $count"
+        }.test {
+            assertEquals("Count: 0", awaitItem())
+
+            repository.savePreference("counter", 5)
+            assertEquals("Count: 5", awaitItem())
+
+            repository.savePreference("counter", 10)
+            assertEquals("Count: 10", awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+
+        // Test key change observation
+        operators.observeAnyKeyChange("monitored1", "monitored2").test {
+            repository.savePreference("monitored1", "value1")
+            assertEquals("monitored1", awaitItem())
+
+            repository.savePreference("unmonitored", "value")
+            // Should not emit
+
+            repository.savePreference("monitored2", "value2")
+            assertEquals("monitored2", awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+
+        println("✅ Preference flow operators test passed")
+    }
+
+    /**
+     * Test 5: Caching Functionality
+     * Tests LRU cache behavior and cache management
+     */
+    @Test
+    fun test05_CachingFunctionality() = runTest(testDispatcher) {
+        println("=== Testing Caching Functionality ===")
+
+        // Create a small cache to test eviction
+        val cache = LruCacheManager<String, String>(maxSize = 3)
+
+        // Test basic cache operations
+        cache.put("key1", "value1")
+        cache.put("key2", "value2")
+        cache.put("key3", "value3")
+
+        assertEquals(3, cache.size())
+        assertEquals("value1", cache.get("key1"))
+        assertEquals("value2", cache.get("key2"))
+        assertEquals("value3", cache.get("key3"))
+
+        // Test LRU eviction
+        cache.put("key4", "value4") // Should evict key1 (least recently used)
+        assertEquals(3, cache.size())
+        assertNull(cache.get("key1"), "key1 should have been evicted")
+        assertEquals("value4", cache.get("key4"))
+
+        // Test cache removal
+        cache.remove("key2")
+        assertEquals(2, cache.size())
+        assertNull(cache.get("key2"))
+
+        // Test cache clear
+        cache.clear()
+        assertEquals(0, cache.size())
+
+        // Test with datastore factory
+        val settings = MapSettings()
+        val cacheableDataStore = DataStoreFactory()
+            .settings(settings)
+            .cacheSize(5)
+            .dispatcher(testDispatcher)
+            .buildDataStore()
+
+        // Test cache hit/miss behavior
+        val putResult = cacheableDataStore.putValue("cached_key", "cached_value")
+        assertTrue(putResult.isSuccess)
+
+        val getResult = cacheableDataStore.getValue("cached_key", "default")
+        assertTrue(getResult.isSuccess)
+        assertEquals("cached_value", getResult.getOrThrow())
+
+        // Verify cache contains the value
+        assertTrue(cacheableDataStore.getCacheSize() > 0)
+
+        // Test cache invalidation
+        val invalidateResult = cacheableDataStore.invalidateCache("cached_key")
+        assertTrue(invalidateResult.isSuccess)
+
+        println("✅ Caching functionality test passed")
+    }
+
+    /**
+     * Test 6: Validation and Error Handling
+     * Tests input validation and error scenarios
+     */
+    @Test
+    fun test06_ValidationAndErrorHandling() = runTest(testDispatcher) {
+        println("=== Testing Validation and Error Handling ===")
+
+        val validator = DefaultPreferencesValidator()
+
+        // Test key validation
+        assertTrue(validator.validateKey("valid_key").isSuccess)
+        assertTrue(validator.validateKey("").isFailure)
+        assertTrue(validator.validateKey(" ".repeat(256)).isFailure)
+
+        // Test value validation
+        assertTrue(validator.validateValue("valid_value").isSuccess)
+        assertTrue(validator.validateValue(123).isSuccess)
+        assertTrue(validator.validateValue(null).isFailure)
+
+        val longString = "x".repeat(20000)
+        assertTrue(validator.validateValue(longString).isFailure)
+
+        // Test serialization error handling
+        val strategy = JsonSerializationStrategy()
+
+        @Serializable
+        data class TestData(val value: String)
+
+        val validData = TestData("test")
+        val serializeResult = strategy.serialize(validData, TestData.serializer())
+        assertTrue(serializeResult.isSuccess)
+
+        val deserializeResult = strategy.deserialize(
+            serializeResult.getOrThrow(),
+            TestData.serializer(),
+        )
+        assertTrue(deserializeResult.isSuccess)
+        assertEquals(validData, deserializeResult.getOrThrow())
+
+        // Test deserializing invalid JSON
+        val invalidDeserializeResult = strategy.deserialize(
+            "invalid json",
+            TestData.serializer(),
+        )
+        assertTrue(invalidDeserializeResult.isFailure)
+
+        // Test type handler error scenarios
+        val intHandler = IntTypeHandler()
+        assertTrue(intHandler.canHandle(42))
+        assertFalse(intHandler.canHandle("not an int"))
+        assertFalse(intHandler.canHandle(null))
+
+        println("✅ Validation and error handling test passed")
+    }
+
+    /**
+     * Test 7: Flow Extensions
+     * Tests custom flow extension functions
+     */
+    @Test
+    fun test07_FlowExtensions() = runTest(testDispatcher) {
+        println("=== Testing Flow Extensions ===")
+
+        // Test change filtering extensions
+        repository.observePreferenceChanges().onlyAdditions().test {
+            repository.savePreference("add_test", "value1")
+            val addition = awaitItem()
+            assertTrue(addition is DataStoreChangeEvent.ValueAdded)
+            assertEquals("add_test", addition.key)
+
+            // Update should not appear in additions
+            repository.savePreference("add_test", "value2")
+
+            repository.savePreference("add_test2", "value2")
+            val addition2 = awaitItem()
+            assertTrue(addition2 is DataStoreChangeEvent.ValueAdded)
+            assertEquals("add_test2", addition2.key)
+
+            cancelAndIgnoreRemainingEvents()
+        }
+
+        repository.observePreferenceChanges().onlyUpdates().test {
+            // First save (addition) should not appear
+            repository.savePreference("update_test", "initial")
+
+            // Second save (update) should appear
+            repository.savePreference("update_test", "updated")
+            val update = awaitItem()
+            assertTrue(update is DataStoreChangeEvent.ValueUpdated)
+            assertEquals("update_test", update.key)
+            assertEquals("initial", update.oldValue)
+            assertEquals("updated", update.newValue)
+
+            cancelAndIgnoreRemainingEvents()
+        }
+
+        repository.observePreferenceChanges().onlyRemovals().test {
+            repository.savePreference("remove_test", "value")
+
+            repository.removePreference("remove_test")
+            val removal = awaitItem()
+            assertTrue(removal is DataStoreChangeEvent.ValueRemoved)
+            assertEquals("remove_test", removal.key)
+
+            cancelAndIgnoreRemainingEvents()
+        }
+
+        println("✅ Flow extensions test passed")
+    }
+
+    /**
+     * Test 8: Performance and Stress Testing
+     * Tests performance characteristics under load
+     */
+    @Test
+    fun test08_PerformanceAndStressTesting() = runTest(testDispatcher) {
+        println("=== Testing Performance and Stress ===")
+
+        val operationCount = 100
+
+        // Test rapid sequential operations
+        val sequentialDuration = measureTime {
+            repeat(operationCount) { i ->
+                repository.savePreference("perf_key_$i", "value_$i")
+            }
+            advanceUntilIdle()
+        }
+
+        // Verify all values were saved
+        repeat(operationCount) { i ->
+            val result = repository.getPreference("perf_key_$i", "")
+            assertEquals("value_$i", result.getOrThrow())
+        }
+
+        println("Sequential operations ($operationCount): ${sequentialDuration.inWholeMilliseconds}ms")
+
+        // Test rapid updates to same key
+        repository.observePreference("rapid_update", 0).test {
+            assertEquals(0, awaitItem()) // Initial value
+
+            val updateDuration = measureTime {
+                repeat(50) { i ->
+                    repository.savePreference("rapid_update", i + 1)
+                    advanceUntilIdle()
+                }
+            }
+
+            // Should receive all updates
+            repeat(50) { i ->
+                assertEquals(i + 1, awaitItem())
+            }
+
+            println("Rapid updates (50): ${updateDuration.inWholeMilliseconds}ms")
+
+            cancelAndIgnoreRemainingEvents()
+        }
+
+        // Test large object serialization
+        val largeConfig = AppConfig(
+            version = "1.0.0",
+            features = (1..100).map { "feature_$it" },
+            settings = (1..50).associate { "setting_$it" to "value_$it" },
+        )
+
+        val serializationDuration = measureTime {
+            repeat(10) {
+                repository.saveSerializablePreference(
+                    "large_config_$it",
+                    largeConfig,
+                    AppConfig.serializer(),
+                )
+            }
+            advanceUntilIdle()
+        }
+
+        println("Large object serialization (10): ${serializationDuration.inWholeMilliseconds}ms")
+
+        // Verify large objects were saved correctly
+        repeat(10) {
+            val result = repository.getSerializablePreference(
+                "large_config_$it",
+                AppConfig("", emptyList(), emptyMap()),
+                AppConfig.serializer(),
+            )
+            assertEquals(largeConfig, result.getOrThrow())
+        }
+
+        println("✅ Performance and stress test passed")
+    }
+
+    /**
+     * Test 9: Complete Integration Scenario
+     * Tests realistic app usage patterns
+     */
+    @Test
+    fun test09_CompleteIntegrationScenario() = runTest(testDispatcher) {
+        println("=== Testing Complete Integration Scenario ===")
+
+        // Simulate complete app onboarding and usage
+
+        // 1. Initial app setup
+        val appConfig = AppConfig(
+            version = "2.1.0",
+            features = listOf("dark_mode", "notifications", "analytics"),
+            settings = mapOf(
+                "api_timeout" to "30000",
+                "cache_size" to "100",
+                "log_level" to "info",
+            ),
+        )
+
+        repository.saveSerializablePreference("app_config", appConfig, AppConfig.serializer())
+
+        // 2. User profile creation
+        val userProfile = UserProfile(
+            id = 12345,
+            name = "Integration Test User",
+            email = "test@example.com",
+            age = 25,
+            preferences = UserPreferences(
+                theme = "auto",
+                language = "en",
+                notifications = true,
+                fontSize = 15.0f,
+            ),
+        )
+
+        repository.saveSerializablePreference("user_profile", userProfile, UserProfile.serializer())
+
+        // 3. Session preferences
+        repository.savePreference("session_id", "sess_abc123")
+        repository.savePreference("login_timestamp", System.now().toEpochMilliseconds())
+        repository.savePreference("device_id", "device_xyz789")
+
+        // 4. Feature flags and settings
+        val featureFlags = mapOf(
+            "new_ui" to true,
+            "beta_features" to false,
+            "experimental_api" to true,
+        )
+
+        featureFlags.forEach { (flag, enabled) ->
+            repository.savePreference("feature_$flag", enabled)
+        }
+
+        // 5. Observe combined user state
+        operators.combinePreferences(
+            "user_profile",
+            UserProfile(),
+            "session_id",
+            "",
+        ) { profile, sessionId ->
+            "User: ${profile.name} (${profile.email}), Session: $sessionId"
+        }.test {
+            val expectedState =
+                "User: ${userProfile.name} (${userProfile.email}), Session: sess_abc123"
+            assertEquals(expectedState, awaitItem())
+
+            // Update user profile
+            val updatedProfile = userProfile.copy(name = "Updated User")
+            repository.saveSerializablePreference(
+                "user_profile",
+                updatedProfile,
+                UserProfile.serializer(),
+            )
+
+            val expectedUpdatedState =
+                "User: Updated User (${userProfile.email}), Session: sess_abc123"
+            assertEquals(expectedUpdatedState, awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+
+        // 6. Verify all data persistence
+        val retrievedConfig = repository.getSerializablePreference(
+            "app_config",
+            AppConfig("", emptyList(), emptyMap()),
+            AppConfig.serializer(),
+        ).getOrThrow()
+        assertEquals(appConfig, retrievedConfig)
+
+        val retrievedProfile = repository.getSerializablePreference(
+            "user_profile",
+            UserProfile(),
+            UserProfile.serializer(),
+        ).getOrThrow()
+        assertEquals("Updated User", retrievedProfile.name)
+
+        // 7. Test bulk operations
+        val bulkClearDuration = measureTime {
+            repository.clearAllPreferences()
+            advanceUntilIdle()
+        }
+
+        println("Bulk clear operation: ${bulkClearDuration.inWholeMilliseconds}ms")
+
+        // Verify everything was cleared
+        val keysAfterClear = repository.observeAllKeys().first()
+        assertTrue(keysAfterClear.isEmpty(), "All keys should be cleared")
+
+        println("✅ Complete integration scenario test passed")
+    }
+
+    /**
+     * Test 10: Edge Cases and Boundary Conditions
+     * Tests unusual scenarios and edge cases
+     */
+    @Test
+    fun test10_EdgeCasesAndBoundaryConditions() = runTest(testDispatcher) {
+        println("=== Testing Edge Cases and Boundary Conditions ===")
+
+        // Test empty string handling
+        repository.savePreference("empty_string", "")
+        assertEquals("", repository.getPreference("empty_string", "default").getOrThrow())
+
+        // Test special characters in keys and values
+        val specialKey = "key_with_special_chars_!@#$%^&*()"
+        val specialValue = "Value with émojis 🚀💻 and spëcial chars: <>?/|\\`~"
+        repository.savePreference(specialKey, specialValue)
+        assertEquals(specialValue, repository.getPreference(specialKey, "").getOrThrow())
+
+        // Test very long strings (within limits)
+        val longValue = "x".repeat(9999) // Just under the 10000 limit
+        repository.savePreference("long_value", longValue)
+        assertEquals(longValue, repository.getPreference("long_value", "").getOrThrow())
+
+        // Test numeric edge cases
+        repository.savePreference("max_int", Int.MAX_VALUE)
+        repository.savePreference("min_int", Int.MIN_VALUE)
+        repository.savePreference("max_long", Long.MAX_VALUE)
+        repository.savePreference("min_long", Long.MIN_VALUE)
+        repository.savePreference("max_float", Float.MAX_VALUE)
+        repository.savePreference("min_float", Float.MIN_VALUE)
+        repository.savePreference("max_double", Double.MAX_VALUE)
+        repository.savePreference("min_double", Double.MIN_VALUE)
+
+        assertEquals(Int.MAX_VALUE, repository.getPreference("max_int", 0).getOrThrow())
+        assertEquals(Int.MIN_VALUE, repository.getPreference("min_int", 0).getOrThrow())
+        assertEquals(Long.MAX_VALUE, repository.getPreference("max_long", 0L).getOrThrow())
+        assertEquals(Long.MIN_VALUE, repository.getPreference("min_long", 0L).getOrThrow())
+        assertEquals(Float.MAX_VALUE, repository.getPreference("max_float", 0f).getOrThrow())
+        assertEquals(Float.MIN_VALUE, repository.getPreference("min_float", 0f).getOrThrow())
+        assertEquals(Double.MAX_VALUE, repository.getPreference("max_double", 0.0).getOrThrow())
+        assertEquals(Double.MIN_VALUE, repository.getPreference("min_double", 0.0).getOrThrow())
+
+        // Test rapid key creation and deletion
+        repeat(20) { i ->
+            repository.savePreference("temp_key_$i", "temp_value_$i")
+        }
+
+        repeat(20) { i ->
+            assertTrue(repository.hasPreference("temp_key_$i"))
+            repository.removePreference("temp_key_$i")
+            assertFalse(repository.hasPreference("temp_key_$i"))
+        }
+
+        // Test observing non-existent keys
+        repository.observePreference("non_existent", "default_value").test {
+            assertEquals("default_value", awaitItem())
+
+            // Create the key
+            repository.savePreference("non_existent", "now_exists")
+            assertEquals("now_exists", awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+
+        // Test multiple observers on same key
+        val observers = List(5) {
+            repository.observePreference("shared_key", "initial")
+        }
+
+        observers.forEach { flow ->
+            flow.test {
+                assertEquals("initial", awaitItem())
+                expectNoEvents() // Should not have additional events yet
+                cancelAndIgnoreRemainingEvents()
+            }
+        }
+
+        println("✅ Edge cases and boundary conditions test passed")
+    }
+
+    // Helper function to get default values for different types
+    @Suppress("UNCHECKED_CAST")
+    private fun <T> getDefaultForType(value: T): T = when (value) {
+        is Int -> 0 as T
+        is Long -> 0L as T
+        is Float -> 0f as T
+        is Double -> 0.0 as T
+        is String -> "" as T
+        is Boolean -> false as T
+        else -> throw IllegalArgumentException("Unsupported type: ${value?.let { it::class }}")
+    }
+
+    /**
+     * Runs all tests in sequence and provides a comprehensive report
+     */
+    @Test
+    fun runAllFeatureTests() = runTest(testDispatcher) {
+        println("🚀 Starting Comprehensive DataStore Feature Test Suite")
+        println("=" * 60)
+
+        val totalDuration = measureTime {
+            try {
+                test01_BasicDataStoreOperations()
+                test02_SerializableObjectStorage()
+                test03_ReactiveFunctionality()
+                test04_PreferenceFlowOperators()
+                test05_CachingFunctionality()
+                test06_ValidationAndErrorHandling()
+                test07_FlowExtensions()
+                test08_PerformanceAndStressTesting()
+                test09_CompleteIntegrationScenario()
+                test10_EdgeCasesAndBoundaryConditions()
+            } catch (e: Exception) {
+                println("❌ Test suite failed with error: ${e.message}")
+                throw e
+            }
+        }
+
+        println("=" * 60)
+        println("🎉 ALL FEATURE TESTS PASSED!")
+        println("⏱️  Total execution time: ${totalDuration.inWholeMilliseconds}ms")
+        println("✅ DataStore module is fully functional and ready for production")
+        println("=" * 60)
+    }
+}
+
+/**
+ * Extension function for string repetition (Kotlin doesn't have this built-in)
+ */
+private operator fun String.times(count: Int): String = repeat(count)

core-base/datastore/src/commonTest/kotlin/template/core/base/datastore/EnhancedUserPreferencesDataStoreTest.kt

@@ -0,0 +1,133 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore
+
+import com.russhwolf.settings.MapSettings
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.StandardTestDispatcher
+import kotlinx.coroutines.test.runTest
+import kotlinx.serialization.Serializable
+import template.core.base.datastore.cache.LruCacheManager
+import template.core.base.datastore.handlers.BooleanTypeHandler
+import template.core.base.datastore.handlers.IntTypeHandler
+import template.core.base.datastore.handlers.StringTypeHandler
+import template.core.base.datastore.handlers.TypeHandler
+import template.core.base.datastore.serialization.JsonSerializationStrategy
+import template.core.base.datastore.store.CachedPreferencesStore
+import template.core.base.datastore.validation.DefaultPreferencesValidator
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+@ExperimentalCoroutinesApi
+class EnhancedUserPreferencesDataStoreTest {
+    private val testDispatcher = StandardTestDispatcher()
+    private val settings = MapSettings()
+    private val cacheManager = LruCacheManager<String, Any>(maxSize = 2)
+
+    @Suppress("UNCHECKED_CAST")
+    private val dataStore = CachedPreferencesStore(
+        settings = settings,
+        dispatcher = testDispatcher,
+        typeHandlers = listOf(
+            IntTypeHandler(),
+            StringTypeHandler(),
+            BooleanTypeHandler(),
+        ) as List<TypeHandler<Any>>,
+        serializationStrategy = JsonSerializationStrategy(),
+        validator = DefaultPreferencesValidator(),
+        cacheManager = cacheManager,
+    )
+
+    @Serializable
+    data class Custom(val id: Int, val name: String)
+
+    @Test
+    fun putAndGet_PrimitiveTypes() = runTest(testDispatcher) {
+        assertTrue(dataStore.putValue("int", 1).isSuccess)
+        assertEquals(1, dataStore.getValue("int", 0).getOrThrow())
+        assertTrue(dataStore.putValue("bool", true).isSuccess)
+        assertEquals(true, dataStore.getValue("bool", false).getOrThrow())
+    }
+
+    @Test
+    fun putAndGet_SerializableType() = runTest(testDispatcher) {
+        val custom = Custom(1, "abc")
+        assertTrue(dataStore.putSerializableValue("custom", custom, Custom.serializer()).isSuccess)
+        assertEquals(custom, dataStore.getSerializableValue("custom", Custom(0, ""), Custom.serializer()).getOrThrow())
+    }
+
+    @Test
+    fun getValue_ReturnsDefaultIfMissingOrCorrupt() = runTest(testDispatcher) {
+        assertEquals(99, dataStore.getValue("missing", 99).getOrThrow())
+    }
+
+    @Test
+    fun hasKey_WorksWithCache() = runTest(testDispatcher) {
+        assertTrue(dataStore.hasKey("nope").getOrThrow() == false)
+        assertTrue(dataStore.putValue("exists", 1).isSuccess)
+        assertTrue(dataStore.hasKey("exists").getOrThrow())
+    }
+
+    @Test
+    fun removeValue_RemovesFromCacheAndSettings() = runTest(testDispatcher) {
+        assertTrue(dataStore.putValue("toremove", 5).isSuccess)
+        assertTrue(dataStore.removeValue("toremove").isSuccess)
+        assertEquals(0, dataStore.getValue("toremove", 0).getOrThrow())
+    }
+
+    @Test
+    fun clearAll_RemovesEverything() = runTest(testDispatcher) {
+        assertTrue(dataStore.putValue("a", 1).isSuccess)
+        assertTrue(dataStore.putValue("b", 2).isSuccess)
+        assertTrue(dataStore.clearAll().isSuccess)
+        assertEquals(0, dataStore.getValue("a", 0).getOrThrow())
+        assertEquals(0, dataStore.getValue("b", 0).getOrThrow())
+    }
+
+    @Test
+    fun getAllKeysAndSize() = runTest(testDispatcher) {
+        assertTrue(dataStore.putValue("k1", 1).isSuccess)
+        assertTrue(dataStore.putValue("k2", 2).isSuccess)
+        assertEquals(setOf("k1", "k2"), dataStore.getAllKeys().getOrThrow())
+        assertEquals(2, dataStore.getSize().getOrThrow())
+    }
+
+    @Test
+    fun cacheEviction_WorksAsExpected() = runTest(testDispatcher) {
+        assertTrue(dataStore.putValue("k1", 1).isSuccess)
+        assertTrue(dataStore.putValue("k2", 2).isSuccess)
+        assertTrue(dataStore.putValue("k3", 3).isSuccess) // Should evict k1 if maxSize=2
+        assertEquals(2, dataStore.getCacheSize())
+        assertTrue(!cacheManager.containsKey("k1"))
+    }
+
+    @Test
+    fun invalidateCache_RemovesSpecificKey() = runTest(testDispatcher) {
+        assertTrue(dataStore.putValue("k1", 1).isSuccess)
+        assertTrue(dataStore.invalidateCache("k1").isSuccess)
+        assertTrue(!cacheManager.containsKey("k1"))
+    }
+
+    @Test
+    fun invalidateAllCache_RemovesAll() = runTest(testDispatcher) {
+        assertTrue(dataStore.putValue("k1", 1).isSuccess)
+        assertTrue(dataStore.putValue("k2", 2).isSuccess)
+        assertTrue(dataStore.invalidateAllCache().isSuccess)
+        assertEquals(0, dataStore.getCacheSize())
+    }
+
+    @Test
+    fun putValue_FailsForUnsupportedType() = runTest(testDispatcher) {
+        class Unsupported
+        val result = dataStore.putValue("bad", Unsupported())
+        assertTrue(result.isFailure)
+    }
+}

core-base/datastore/src/commonTest/kotlin/template/core/base/datastore/ReactiveUserPreferencesDataStoreTest.kt

@@ -0,0 +1,220 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore
+
+import app.cash.turbine.test
+import com.russhwolf.settings.MapSettings
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.test.StandardTestDispatcher
+import kotlinx.coroutines.test.advanceUntilIdle
+import kotlinx.coroutines.test.runTest
+import kotlinx.serialization.Serializable
+import template.core.base.datastore.cache.LruCacheManager
+import template.core.base.datastore.contracts.DataStoreChangeEvent
+import template.core.base.datastore.handlers.BooleanTypeHandler
+import template.core.base.datastore.handlers.DoubleTypeHandler
+import template.core.base.datastore.handlers.FloatTypeHandler
+import template.core.base.datastore.handlers.IntTypeHandler
+import template.core.base.datastore.handlers.LongTypeHandler
+import template.core.base.datastore.handlers.StringTypeHandler
+import template.core.base.datastore.handlers.TypeHandler
+import template.core.base.datastore.reactive.DefaultChangeNotifier
+import template.core.base.datastore.reactive.DefaultValueObserver
+import template.core.base.datastore.serialization.JsonSerializationStrategy
+import template.core.base.datastore.store.ReactiveUserPreferencesDataStore
+import template.core.base.datastore.validation.DefaultPreferencesValidator
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+@ExperimentalCoroutinesApi
+class ReactiveUserPreferencesDataStoreTest {
+
+    private val testDispatcher = StandardTestDispatcher()
+    private val settings = MapSettings()
+    private val changeNotifier = DefaultChangeNotifier()
+
+    private val reactiveDataStore = ReactiveUserPreferencesDataStore(
+        settings = settings,
+        dispatcher = testDispatcher,
+        typeHandlers = listOf(
+            IntTypeHandler(),
+            StringTypeHandler(),
+            BooleanTypeHandler(),
+            LongTypeHandler(),
+            FloatTypeHandler(),
+            DoubleTypeHandler(),
+        ) as List<TypeHandler<Any>>,
+        serializationStrategy = JsonSerializationStrategy(),
+        validator = DefaultPreferencesValidator(),
+        cacheManager = LruCacheManager(maxSize = 10),
+        changeNotifier = changeNotifier,
+        valueObserver = DefaultValueObserver(changeNotifier),
+    )
+
+    @Serializable
+    data class TestUser(
+        val id: Long,
+        val name: String,
+        val age: Int,
+    )
+
+    @Test
+    fun observeValue_EmitsInitialValueAndUpdates() = runTest(testDispatcher) {
+        // Initially store a value
+        assertTrue(reactiveDataStore.putValue("test_key", "initial").isSuccess)
+
+        reactiveDataStore.observeValue("test_key", "default").test {
+            // Should emit initial value
+            assertEquals("initial", awaitItem())
+
+            // Update the value
+            assertTrue(reactiveDataStore.putValue("test_key", "updated").isSuccess)
+            assertEquals("updated", awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    @Test
+    fun observeValue_EmitsDefaultWhenKeyNotExists() = runTest(testDispatcher) {
+        reactiveDataStore.observeValue("non_existent", "default").test {
+            assertEquals("default", awaitItem())
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    @Test
+    fun observeSerializableValue_WorksWithCustomObjects() = runTest(testDispatcher) {
+        val defaultUser = TestUser(0, "", 0)
+        val testUser = TestUser(1, "John", 25)
+
+        reactiveDataStore.observeSerializableValue(
+            "user",
+            defaultUser,
+            TestUser.serializer(),
+        ).test {
+            // Should emit default initially
+            assertEquals(defaultUser, awaitItem())
+
+            // Update with new user
+            assertTrue(
+                reactiveDataStore.putSerializableValue(
+                    "user",
+                    testUser,
+                    TestUser.serializer(),
+                ).isSuccess,
+            )
+            assertEquals(testUser, awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    @Test
+    fun observeChanges_EmitsCorrectChangeTypes() = runTest(testDispatcher) {
+        reactiveDataStore.observeChanges().test {
+            // Add a value
+            assertTrue(reactiveDataStore.putValue("key1", "value1").isSuccess)
+            val addChange = awaitItem()
+            assertTrue(addChange is DataStoreChangeEvent.ValueAdded)
+            assertEquals("key1", addChange.key)
+            assertEquals("value1", addChange.value)
+
+            // Update the value
+            assertTrue(reactiveDataStore.putValue("key1", "value2").isSuccess)
+            val updateChange = awaitItem()
+            assertTrue(updateChange is DataStoreChangeEvent.ValueUpdated)
+            assertEquals("key1", updateChange.key)
+            assertEquals("value1", updateChange.oldValue)
+            assertEquals("value2", updateChange.newValue)
+
+            // Remove the value
+            assertTrue(reactiveDataStore.removeValue("key1").isSuccess)
+            val removeChange = awaitItem()
+            assertTrue(removeChange is DataStoreChangeEvent.ValueRemoved)
+            assertEquals("key1", removeChange.key)
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    @Test
+    fun observeKeys_EmitsUpdatedKeySets() = runTest(context = testDispatcher) {
+        reactiveDataStore.observeKeys().test {
+            // Initial empty set (from onStart emission)
+            assertEquals(emptySet(), awaitItem())
+            advanceUntilIdle()
+
+            // Add first key
+            assertTrue(reactiveDataStore.putValue("key1", "value1").isSuccess)
+            delay(300) // Allow time for initial emission
+
+            assertEquals(setOf("key1"), awaitItem())
+
+            // Add second key
+            assertTrue(reactiveDataStore.putValue("key2", "value2").isSuccess)
+            assertEquals(setOf("key1", "key2"), awaitItem())
+
+            // Remove first key
+            assertTrue(reactiveDataStore.removeValue("key1").isSuccess)
+            assertEquals(setOf("key2"), awaitItem())
+
+            // Remove second key
+            assertTrue(reactiveDataStore.removeValue("key2").isSuccess)
+            assertEquals(emptySet(), awaitItem())
+        }
+    }
+
+    @Test
+    fun observeSize_EmitsCorrectCounts() = runTest(testDispatcher) {
+        reactiveDataStore.observeSize().test {
+            // Initial size should be 0 (from onStart emission)
+            assertEquals(0, awaitItem())
+
+            // Add items
+            assertTrue(reactiveDataStore.putValue("key1", "value1").isSuccess)
+            assertEquals(1, awaitItem())
+
+            assertTrue(reactiveDataStore.putValue("key2", "value2").isSuccess)
+            assertEquals(2, awaitItem())
+
+            // Clear all
+            assertTrue(reactiveDataStore.clearAll().isSuccess)
+            assertEquals(0, awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    @Test
+    fun observeValue_DistinctUntilChanged() = runTest(testDispatcher) {
+        reactiveDataStore.observeValue("key", "default").test {
+            // Initial emission
+            assertEquals("default", awaitItem())
+
+            // Set same value - should not emit
+            assertTrue(reactiveDataStore.putValue("key", "default").isSuccess)
+
+            // Set different value - should emit
+            assertTrue(reactiveDataStore.putValue("key", "new_value").isSuccess)
+            assertEquals("new_value", awaitItem())
+
+            // Set same value again - should not emit
+            assertTrue(reactiveDataStore.putValue("key", "new_value").isSuccess)
+
+            // Verify no more emissions
+            expectNoEvents()
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+}

core-base/datastore/src/commonTest/kotlin/template/core/base/datastore/UserPreferencesDataStoreTest.kt

@@ -0,0 +1,113 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore
+
+import com.russhwolf.settings.MapSettings
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.StandardTestDispatcher
+import kotlinx.coroutines.test.runTest
+import kotlinx.serialization.Serializable
+import template.core.base.datastore.store.BasicPreferencesStore
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+@ExperimentalCoroutinesApi
+class UserPreferencesDataStoreTest {
+    private val testDispatcher = StandardTestDispatcher()
+    private val settings = MapSettings()
+    private val dataStore = BasicPreferencesStore(settings, testDispatcher)
+
+    @Serializable
+    data class CustomData(val id: Int, val name: String)
+
+    @Test
+    fun putAndGet_PrimitiveTypes() = runTest(testDispatcher) {
+        assertTrue(dataStore.putValue("int", 42).isSuccess)
+        assertEquals(42, dataStore.getValue("int", 0).getOrThrow())
+
+        assertTrue(dataStore.putValue("long", 123L).isSuccess)
+        assertEquals(123L, dataStore.getValue("long", 0L).getOrThrow())
+
+        assertTrue(dataStore.putValue("float", 3.14f).isSuccess)
+        assertEquals(3.14f, dataStore.getValue("float", 0f).getOrThrow())
+
+        assertTrue(dataStore.putValue("double", 2.71).isSuccess)
+        assertEquals(2.71, dataStore.getValue("double", 0.0).getOrThrow())
+
+        assertTrue(dataStore.putValue("string", "hello").isSuccess)
+        assertEquals("hello", dataStore.getValue("string", "").getOrThrow())
+
+        assertTrue(dataStore.putValue("boolean", true).isSuccess)
+        assertEquals(true, dataStore.getValue("boolean", false).getOrThrow())
+    }
+
+    @Test
+    fun putAndGet_CustomType_WithSerializer() = runTest(testDispatcher) {
+        val custom = CustomData(1, "test")
+        assertTrue(dataStore.putValue("custom", custom, CustomData.serializer()).isSuccess)
+        assertEquals(custom, dataStore.getValue("custom", CustomData(0, ""), CustomData.serializer()).getOrThrow())
+    }
+
+    @Test
+    fun putValue_ThrowsWithoutSerializer() = runTest(testDispatcher) {
+        val custom = CustomData(2, "fail")
+        val result = dataStore.putValue("fail", custom)
+        assertTrue(result.isFailure)
+    }
+
+    @Test
+    fun getValue_ThrowsWithoutSerializer() = runTest(testDispatcher) {
+        val result = dataStore.getValue("fail", CustomData(0, ""))
+        assertTrue(result.isFailure)
+    }
+
+    @Test
+    fun getValue_ReturnsDefaultIfKeyMissing() = runTest(testDispatcher) {
+        assertEquals(99, dataStore.getValue("missing", 99).getOrThrow())
+    }
+
+    @Test
+    fun hasKey_WorksCorrectly() = runTest(testDispatcher) {
+        assertTrue(dataStore.hasKey("nope").getOrThrow() == false)
+        assertTrue(dataStore.putValue("exists", 1).isSuccess)
+        assertTrue(dataStore.hasKey("exists").getOrThrow())
+    }
+
+    @Test
+    fun removeValue_RemovesKey() = runTest(testDispatcher) {
+        assertTrue(dataStore.putValue("toremove", 5).isSuccess)
+        assertTrue(dataStore.removeValue("toremove").isSuccess)
+        assertEquals(0, dataStore.getValue("toremove", 0).getOrThrow())
+    }
+
+    @Test
+    fun clearAll_RemovesAllKeys() = runTest(testDispatcher) {
+        assertTrue(dataStore.putValue("a", 1).isSuccess)
+        assertTrue(dataStore.putValue("b", 2).isSuccess)
+        assertTrue(dataStore.clearAll().isSuccess)
+        assertEquals(0, dataStore.getValue("a", 0).getOrThrow())
+        assertEquals(0, dataStore.getValue("b", 0).getOrThrow())
+    }
+
+    @Test
+    fun getAllKeys_ReturnsAllKeys() = runTest(testDispatcher) {
+        assertTrue(dataStore.putValue("k1", 1).isSuccess)
+        assertTrue(dataStore.putValue("k2", 2).isSuccess)
+        assertEquals(setOf("k1", "k2"), dataStore.getAllKeys().getOrThrow())
+    }
+
+    @Test
+    fun getSize_ReturnsCorrectCount() = runTest(testDispatcher) {
+        assertTrue(dataStore.putValue("k1", 1).isSuccess)
+        assertTrue(dataStore.putValue("k2", 2).isSuccess)
+        assertEquals(2, dataStore.getSize().getOrThrow())
+    }
+}

core-base/datastore/src/commonTest/kotlin/template/core/base/datastore/cache/LRUCacheManagerTest.kt

@@ -0,0 +1,60 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.cache
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertNull
+import kotlin.test.assertTrue
+
+class LRUCacheManagerTest {
+    @Test
+    fun putAndGet_WorksCorrectly() {
+        val cache = LruCacheManager<String, Int>(maxSize = 2)
+        cache.put("a", 1)
+        assertEquals(1, cache.get("a"))
+    }
+
+    @Test
+    fun remove_RemovesKey() {
+        val cache = LruCacheManager<String, Int>(maxSize = 2)
+        cache.put("a", 1)
+        cache.remove("a")
+        assertNull(cache.get("a"))
+    }
+
+    @Test
+    fun clear_RemovesAll() {
+        val cache = LruCacheManager<String, Int>(maxSize = 2)
+        cache.put("a", 1)
+        cache.put("b", 2)
+        cache.clear()
+        assertEquals(0, cache.size())
+    }
+
+    @Test
+    fun eviction_EvictsLeastRecentlyUsed() {
+        val cache = LruCacheManager<String, Int>(maxSize = 2)
+        cache.put("a", 1)
+        cache.put("b", 2)
+        cache.put("c", 3) // Should evict "a"
+        assertNull(cache.get("a"))
+        assertEquals(2, cache.size())
+    }
+
+    @Test
+    fun containsKey_Works() {
+        val cache = LruCacheManager<String, Int>(maxSize = 2)
+        cache.put("a", 1)
+        assertTrue(cache.containsKey("a"))
+        cache.remove("a")
+        assertTrue(!cache.containsKey("a"))
+    }
+}

core-base/datastore/src/commonTest/kotlin/template/core/base/datastore/extension/FlowExtensionsTest.kt

@@ -0,0 +1,99 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.extension
+
+import app.cash.turbine.test
+import kotlinx.coroutines.flow.flowOf
+import kotlinx.coroutines.test.runTest
+import template.core.base.datastore.contracts.DataStoreChangeEvent
+import template.core.base.datastore.extensions.mapWithDefault
+import template.core.base.datastore.extensions.onlyAdditions
+import template.core.base.datastore.extensions.onlyRemovals
+import template.core.base.datastore.extensions.onlyUpdates
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+class FlowExtensionsTest {
+
+    @Test
+    fun mapWithDefault_HandlesErrors() = runTest {
+        val flow = flowOf(1, 2, 3)
+            .mapWithDefault("default") {
+                if (it == 2) throw RuntimeException("Error")
+                "value_$it"
+            }
+
+        flow.test {
+            assertEquals("value_1", awaitItem())
+            assertEquals("default", awaitItem()) // Error case
+            awaitComplete()
+        }
+    }
+
+    @Test
+    fun filterChangeType_FiltersCorrectTypes() = runTest {
+        val changes = flowOf(
+            DataStoreChangeEvent.ValueAdded("key1", "value1"),
+            DataStoreChangeEvent.ValueUpdated("key2", "old", "new"),
+            DataStoreChangeEvent.ValueAdded("key3", "value3"),
+            DataStoreChangeEvent.ValueRemoved("key4", "value4"),
+        )
+
+        changes.onlyAdditions().test {
+            val first = awaitItem()
+            assertTrue(true)
+            assertEquals("key1", first.key)
+
+            val second = awaitItem()
+            assertTrue(true)
+            assertEquals("key3", second.key)
+
+            awaitComplete()
+        }
+    }
+
+    @Test
+    fun onlyUpdates_FiltersUpdateChanges() = runTest {
+        val changes = flowOf(
+            DataStoreChangeEvent.ValueAdded("key1", "value1"),
+            DataStoreChangeEvent.ValueUpdated("key2", "old", "new"),
+            DataStoreChangeEvent.ValueRemoved("key3", "value3"),
+        )
+
+        changes.onlyUpdates().test {
+            val update = awaitItem()
+            assertTrue(true)
+            assertEquals("key2", update.key)
+            assertEquals("old", update.oldValue)
+            assertEquals("new", update.newValue)
+
+            awaitComplete()
+        }
+    }
+
+    @Test
+    fun onlyRemovals_FiltersRemovalChanges() = runTest {
+        val changes = flowOf(
+            DataStoreChangeEvent.ValueAdded("key1", "value1"),
+            DataStoreChangeEvent.ValueRemoved("key2", "value2"),
+            DataStoreChangeEvent.ValueUpdated("key3", "old", "new"),
+        )
+
+        changes.onlyRemovals().test {
+            val removal = awaitItem()
+            assertTrue(true)
+            assertEquals("key2", removal.key)
+            assertEquals("value2", removal.oldValue)
+
+            awaitComplete()
+        }
+    }
+}

core-base/datastore/src/commonTest/kotlin/template/core/base/datastore/integration/ReactiveIntegrationTest.kt

@@ -0,0 +1,155 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.integration
+
+import app.cash.turbine.test
+import com.russhwolf.settings.MapSettings
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.StandardTestDispatcher
+import kotlinx.coroutines.test.runTest
+import kotlinx.serialization.Serializable
+import org.koin.core.context.startKoin
+import org.koin.core.context.stopKoin
+import org.koin.core.qualifier.named
+import org.koin.dsl.module
+import org.koin.test.KoinTest
+import org.koin.test.inject
+import template.core.base.datastore.di.CoreDatastoreModule
+import template.core.base.datastore.reactive.PreferenceFlowOperators
+import template.core.base.datastore.repository.ReactivePreferencesRepository
+import kotlin.test.AfterTest
+import kotlin.test.BeforeTest
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+@ExperimentalCoroutinesApi
+class ReactiveIntegrationTest : KoinTest {
+
+    private val repository: ReactivePreferencesRepository by inject()
+    private val operators: PreferenceFlowOperators by inject()
+    private val testDispatcher = StandardTestDispatcher()
+
+    @Serializable
+    data class UserProfile(
+        val name: String,
+        val email: String,
+        val theme: String,
+    )
+
+    @BeforeTest
+    fun setup() {
+        startKoin {
+            modules(
+                CoreDatastoreModule,
+                module {
+                    // Override dispatcher for testing
+                    single<CoroutineDispatcher>(named("IO")) { testDispatcher }
+                    single { PreferenceFlowOperators(get()) }
+                    single<com.russhwolf.settings.Settings> { MapSettings() }
+                },
+            )
+        }
+    }
+
+    @AfterTest
+    fun tearDown() {
+        stopKoin()
+    }
+
+    @Test
+    fun endToEndReactiveTest_ComplexWorkflow() = runTest(testDispatcher) {
+        val defaultProfile = UserProfile("", "", "light")
+
+        // Start observing user profile
+        repository.observeSerializablePreference(
+            "user_profile",
+            defaultProfile,
+            UserProfile.serializer(),
+        ).test {
+            // Initial default profile
+            assertEquals(defaultProfile, awaitItem())
+
+            // Save initial profile
+            val initialProfile = UserProfile("John", "john@example.com", "light")
+            repository.saveSerializablePreference(
+                "user_profile",
+                initialProfile,
+                UserProfile.serializer(),
+            )
+            assertEquals(initialProfile, awaitItem())
+
+            // Update theme
+            val darkProfile = initialProfile.copy(theme = "dark")
+            repository.saveSerializablePreference(
+                "user_profile",
+                darkProfile,
+                UserProfile.serializer(),
+            )
+            assertEquals(darkProfile, awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    @Test
+    fun combinedPreferencesWorkflow() = runTest(testDispatcher) {
+        // Observe combined user state
+        operators.combinePreferences(
+            "username",
+            "",
+            "is_premium",
+            false,
+            "login_count",
+            0,
+        ) { username, isPremium, loginCount ->
+            "User: $username, Premium: $isPremium, Logins: $loginCount"
+        }.test {
+            // Initial state
+            assertEquals("User: , Premium: false, Logins: 0", awaitItem())
+
+            // Set username
+            repository.savePreference("username", "alice")
+            assertEquals("User: alice, Premium: false, Logins: 0", awaitItem())
+
+            // Upgrade to premium
+            repository.savePreference("is_premium", true)
+            assertEquals("User: alice, Premium: true, Logins: 0", awaitItem())
+
+            // Increment login count
+            repository.savePreference("login_count", 1)
+            assertEquals("User: alice, Premium: true, Logins: 1", awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    @Test
+    fun saveAndRetrieveAllPrimitiveTypes() = runTest(testDispatcher) {
+        // Int
+        repository.savePreference("intKey", 42)
+        assertEquals(42, repository.getPreference("intKey", 0).getOrThrow())
+        // String
+        repository.savePreference("stringKey", "hello")
+        assertEquals("hello", repository.getPreference("stringKey", "").getOrThrow())
+        // Boolean
+        repository.savePreference("boolKey", true)
+        assertEquals(true, repository.getPreference("boolKey", false).getOrThrow())
+        // Long
+        repository.savePreference("longKey", 123456789L)
+        assertEquals(123456789L, repository.getPreference("longKey", 0L).getOrThrow())
+        // Float
+        repository.savePreference("floatKey", 3.14f)
+        assertEquals(3.14f, repository.getPreference("floatKey", 0f).getOrThrow())
+        // Double
+        repository.savePreference("doubleKey", 2.718)
+        assertEquals(2.718, repository.getPreference("doubleKey", 0.0).getOrThrow())
+    }
+}

core-base/datastore/src/commonTest/kotlin/template/core/base/datastore/notification/DefaultChangeNotifierTest.kt

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.notification
+
+import app.cash.turbine.test
+import kotlinx.coroutines.test.runTest
+import template.core.base.datastore.contracts.DataStoreChangeEvent
+import template.core.base.datastore.reactive.DefaultChangeNotifier
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class DefaultChangeNotifierTest {
+
+    private val changeNotifier = DefaultChangeNotifier()
+
+    @Test
+    fun observeChanges_EmitsNotifiedChanges() = runTest {
+        changeNotifier.observeChanges().test {
+            val change = DataStoreChangeEvent.ValueAdded("key", "value")
+            changeNotifier.notifyChange(change)
+
+            assertEquals(change, awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    @Test
+    fun observeKeyChanges_FiltersCorrectKey() = runTest {
+        changeNotifier.observeKeyChanges("target_key").test {
+            // Send change for different key - should not emit
+            changeNotifier.notifyChange(DataStoreChangeEvent.ValueAdded("other_key", "value"))
+
+            // Send change for target key - should emit
+            val targetChange = DataStoreChangeEvent.ValueAdded("target_key", "value")
+            changeNotifier.notifyChange(targetChange)
+            assertEquals(targetChange, awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    @Test
+    fun observeKeyChanges_EmitsGlobalChanges() = runTest {
+        changeNotifier.observeKeyChanges("specific_key").test {
+            // Global change (clear all) should be emitted regardless of key
+            val globalChange = DataStoreChangeEvent.StoreCleared()
+            changeNotifier.notifyChange(globalChange)
+            assertEquals(globalChange, awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+}

core-base/datastore/src/commonTest/kotlin/template/core/base/datastore/operators/PreferenceFlowOperatorsTest.kt

@@ -0,0 +1,203 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.operators
+
+import app.cash.turbine.test
+import com.russhwolf.settings.MapSettings
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.test.StandardTestDispatcher
+import kotlinx.coroutines.test.advanceUntilIdle
+import kotlinx.coroutines.test.runTest
+import template.core.base.datastore.cache.LruCacheManager
+import template.core.base.datastore.handlers.BooleanTypeHandler
+import template.core.base.datastore.handlers.IntTypeHandler
+import template.core.base.datastore.handlers.StringTypeHandler
+import template.core.base.datastore.handlers.TypeHandler
+import template.core.base.datastore.reactive.DefaultChangeNotifier
+import template.core.base.datastore.reactive.DefaultValueObserver
+import template.core.base.datastore.reactive.PreferenceFlowOperators
+import template.core.base.datastore.repository.DefaultReactivePreferencesRepository
+import template.core.base.datastore.serialization.JsonSerializationStrategy
+import template.core.base.datastore.store.ReactiveUserPreferencesDataStore
+import template.core.base.datastore.validation.DefaultPreferencesValidator
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+/**
+ * Test suite for [template.core.base.datastore.reactive.PreferenceFlowOperators].
+ * Verifies combining, mapping, and observing preference flows, including edge cases.
+ */
+@ExperimentalCoroutinesApi
+class PreferenceFlowOperatorsTest {
+
+    private val testDispatcher = StandardTestDispatcher()
+    private val changeNotifier = DefaultChangeNotifier()
+
+    private val reactiveDataStore = ReactiveUserPreferencesDataStore(
+        settings = MapSettings(),
+        dispatcher = testDispatcher,
+        typeHandlers = listOf(
+            IntTypeHandler(),
+            StringTypeHandler(),
+            BooleanTypeHandler(),
+        ) as List<TypeHandler<Any>>,
+        serializationStrategy = JsonSerializationStrategy(),
+        validator = DefaultPreferencesValidator(),
+        cacheManager = LruCacheManager(),
+        changeNotifier = changeNotifier,
+        valueObserver = DefaultValueObserver(changeNotifier),
+    )
+
+    private val repository = DefaultReactivePreferencesRepository(reactiveDataStore)
+    private val operators = PreferenceFlowOperators(repository)
+
+    /**
+     * Tests combining two preference flows and verifies correct emission order.
+     */
+    @Test
+    fun combinePreferences_TwoValues_CombinesCorrectly() = runTest(testDispatcher) {
+        operators.combinePreferences(
+            "key1",
+            "default1",
+            "key2",
+            "default2",
+        ) { value1, value2 ->
+            "$value1-$value2"
+        }.test {
+            // Initial combined value
+            assertEquals("default1-default2", awaitItem())
+
+            // Update first preference
+            repository.savePreference("key1", "new1")
+            assertEquals("new1-default2", awaitItem())
+
+            // Update second preference
+            repository.savePreference("key2", "new2")
+            assertEquals("new1-new2", awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    /**
+     * Tests combining three preference flows and verifies correct emission order.
+     */
+    @Test
+    fun combinePreferences_ThreeValues_CombinesCorrectly() = runTest(testDispatcher) {
+        operators.combinePreferences(
+            "theme",
+            "light",
+            "language",
+            "en",
+            "notifications",
+            true,
+        ) { theme, language, notifications ->
+            Triple(theme, language, notifications)
+        }.test {
+            advanceUntilIdle()
+            delay(10)
+
+            // Initial combined value
+            assertEquals(Triple("light", "en", true), awaitItem())
+
+            // Give time for initial emission
+            kotlinx.coroutines.delay(10)
+
+            // Update theme
+            repository.savePreference("theme", "dark")
+            advanceUntilIdle()
+            assertEquals(Triple("dark", "en", true), awaitItem())
+
+            // Update notifications
+            repository.savePreference("notifications", false)
+            delay(10)
+            advanceUntilIdle()
+
+            assertEquals(Triple("dark", "en", false), awaitItem())
+        }
+    }
+
+    /**
+     * Tests observing changes to any of the specified keys.
+     */
+    @Test
+    fun observeAnyKeyChange_EmitsOnSpecifiedKeys() = runTest(testDispatcher) {
+        operators.observeAnyKeyChange("key1", "key2").test {
+            // Change to key1 - should emit
+            repository.savePreference("key1", "value1")
+            assertEquals("key1", awaitItem())
+
+            // Change to key3 - should not emit (not in watched keys)
+            repository.savePreference("key3", "value3")
+
+            // Change to key2 - should emit
+            repository.savePreference("key2", "value2")
+            assertEquals("key2", awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    /**
+     * Tests mapping a preference value using a transform function.
+     */
+    @Test
+    fun observeMappedPreference_TransformsValues() = runTest(testDispatcher) {
+        operators.observeMappedPreference("count", 0) { count ->
+            "Count is: $count"
+        }.test {
+            // Initial mapped value
+            assertEquals("Count is: 0", awaitItem())
+
+            // Update preference
+            repository.savePreference("count", 5)
+            assertEquals("Count is: 5", awaitItem())
+
+            // Update again
+            repository.savePreference("count", 10)
+            assertEquals("Count is: 10", awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    /**
+     * Tests rapid updates to preferences and ensures all changes are emitted.
+     */
+    @Test
+    fun rapidUpdates_AreHandledCorrectly() = runTest(testDispatcher) {
+        operators.observeMappedPreference("rapid", 0) { it }.test {
+            for (i in 1..5) {
+                repository.savePreference("rapid", i)
+                assertEquals(i, awaitItem())
+            }
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    /**
+     * Tests combining preferences with default/null values.
+     */
+    @Test
+    fun combinePreferences_DefaultValues() = runTest(testDispatcher) {
+        operators.combinePreferences(
+            "missing1",
+            "",
+            "missing2",
+            "",
+        ) { v1, v2 ->
+            v1 to v2
+        }.test {
+            assertEquals("" to "", awaitItem())
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+}

core-base/datastore/src/commonTest/kotlin/template/core/base/datastore/performance/ReactivePerformanceTest.kt

@@ -0,0 +1,121 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.performance
+
+import app.cash.turbine.test
+import app.cash.turbine.turbineScope
+import com.russhwolf.settings.MapSettings
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.test.StandardTestDispatcher
+import kotlinx.coroutines.test.advanceUntilIdle
+import kotlinx.coroutines.test.runTest
+import kotlinx.coroutines.yield
+import template.core.base.datastore.cache.LruCacheManager
+import template.core.base.datastore.handlers.BooleanTypeHandler
+import template.core.base.datastore.handlers.IntTypeHandler
+import template.core.base.datastore.handlers.StringTypeHandler
+import template.core.base.datastore.handlers.TypeHandler
+import template.core.base.datastore.reactive.DefaultChangeNotifier
+import template.core.base.datastore.reactive.DefaultValueObserver
+import template.core.base.datastore.serialization.JsonSerializationStrategy
+import template.core.base.datastore.store.ReactiveUserPreferencesDataStore
+import template.core.base.datastore.validation.DefaultPreferencesValidator
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+import kotlin.time.measureTime
+
+@ExperimentalCoroutinesApi
+class ReactivePerformanceTest {
+
+    private val testDispatcher = StandardTestDispatcher()
+    private val changeNotifier = DefaultChangeNotifier()
+
+    @Suppress("UNCHECKED_CAST")
+    private val reactiveDataStore = ReactiveUserPreferencesDataStore(
+        settings = MapSettings(),
+        dispatcher = testDispatcher,
+        typeHandlers = listOf(
+            IntTypeHandler(),
+            StringTypeHandler(),
+            BooleanTypeHandler(),
+        ) as List<TypeHandler<Any>>,
+        serializationStrategy = JsonSerializationStrategy(),
+        validator = DefaultPreferencesValidator(),
+        cacheManager = LruCacheManager(maxSize = 1000),
+        changeNotifier = changeNotifier,
+        valueObserver = DefaultValueObserver(changeNotifier),
+    )
+
+    @Test
+    fun rapidUpdates_HandledEfficiently() = runTest(testDispatcher) {
+        val updateCount = 100
+
+        reactiveDataStore.observeValue("counter", 0).test {
+            // Initial value
+            assertEquals(0, awaitItem())
+
+            // Give time for initial emission
+            delay(10)
+
+            val duration = measureTime {
+                repeat(updateCount) { i ->
+                    reactiveDataStore.putValue("counter", i + 1)
+                    advanceUntilIdle()
+                }
+                yield()
+                advanceUntilIdle()
+            }
+
+            // Should receive all updates in order
+            val received = mutableListOf<Int>()
+            repeat(updateCount) {
+                received.add(awaitItem())
+            }
+            assertEquals((1..updateCount).toList(), received)
+
+            // Verify performance is reasonable (this is a rough check)
+            assertTrue(
+                duration.inWholeMilliseconds < 5000,
+                "Updates took too long: \\${duration.inWholeMilliseconds}ms",
+            )
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    @Test
+    fun multipleObservers_ShareNotifications() = runTest(testDispatcher) {
+        turbineScope {
+            val observer1 = reactiveDataStore
+                .observeValue("shared_key", "default").testIn(backgroundScope)
+
+            val observer2 =
+                reactiveDataStore.observeValue("shared_key", "default").testIn(backgroundScope)
+
+            advanceUntilIdle()
+
+            // Both should get initial value
+            assertEquals("default", observer1.awaitItem())
+            assertEquals("default", observer2.awaitItem())
+
+            // Give time for initial emission
+            delay(10)
+
+            // Update the value
+            reactiveDataStore.putValue("shared_key", "updated")
+
+            // Both should get updated value
+            assertEquals("updated", observer1.awaitItem())
+            assertEquals("updated", observer2.awaitItem())
+        }
+    }
+}

core-base/datastore/src/commonTest/kotlin/template/core/base/datastore/repository/DefaultReactiveUserPreferencesRepositoryTest.kt

@@ -0,0 +1,169 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.repository
+
+import app.cash.turbine.test
+import com.russhwolf.settings.MapSettings
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.test.StandardTestDispatcher
+import kotlinx.coroutines.test.advanceUntilIdle
+import kotlinx.coroutines.test.runTest
+import kotlinx.serialization.Serializable
+import template.core.base.datastore.cache.LruCacheManager
+import template.core.base.datastore.contracts.DataStoreChangeEvent
+import template.core.base.datastore.handlers.BooleanTypeHandler
+import template.core.base.datastore.handlers.IntTypeHandler
+import template.core.base.datastore.handlers.StringTypeHandler
+import template.core.base.datastore.handlers.TypeHandler
+import template.core.base.datastore.reactive.DefaultChangeNotifier
+import template.core.base.datastore.reactive.DefaultValueObserver
+import template.core.base.datastore.serialization.JsonSerializationStrategy
+import template.core.base.datastore.store.ReactiveUserPreferencesDataStore
+import template.core.base.datastore.validation.DefaultPreferencesValidator
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+@ExperimentalCoroutinesApi
+class DefaultReactiveUserPreferencesRepositoryTest {
+
+    private val testDispatcher = StandardTestDispatcher()
+    private val changeNotifier = DefaultChangeNotifier()
+
+    private val reactiveDataStore = ReactiveUserPreferencesDataStore(
+        settings = MapSettings(),
+        dispatcher = testDispatcher,
+        typeHandlers = listOf(
+            IntTypeHandler(),
+            StringTypeHandler(),
+            BooleanTypeHandler(),
+        ) as List<TypeHandler<Any>>,
+        serializationStrategy = JsonSerializationStrategy(),
+        validator = DefaultPreferencesValidator(),
+        cacheManager = LruCacheManager(),
+        changeNotifier = changeNotifier,
+        valueObserver = DefaultValueObserver(changeNotifier),
+    )
+
+    private val repository = DefaultReactivePreferencesRepository(reactiveDataStore)
+
+    @Serializable
+    data class AppSettings(
+        val theme: String,
+        val language: String,
+        val notifications: Boolean,
+    )
+
+    @Test
+    fun observePreference_ReactsToChanges() = runTest(testDispatcher) {
+        repository.observePreference("theme", "light").test {
+            // Initial value
+            assertEquals("light", awaitItem())
+
+            // Save new preference
+            repository.savePreference("theme", "dark")
+            assertEquals("dark", awaitItem())
+
+            // Save another value
+            repository.savePreference("theme", "auto")
+            assertEquals("auto", awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    @Test
+    fun observeSerializablePreference_ReactsToComplexObjects() = runTest(testDispatcher) {
+        val defaultSettings = AppSettings("light", "en", true)
+
+        repository.observeSerializablePreference(
+            "app_settings",
+            defaultSettings,
+            AppSettings.serializer(),
+        ).test {
+            // Initial default
+            assertEquals(defaultSettings, awaitItem())
+
+            // Update settings
+            val newSettings = AppSettings("dark", "es", false)
+            repository.saveSerializablePreference(
+                "app_settings",
+                newSettings,
+                AppSettings.serializer(),
+            )
+            assertEquals(newSettings, awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    @Test
+    fun observePreferenceChanges_FiltersCorrectly() = runTest(testDispatcher) {
+        repository.observePreferenceChanges("specific_key").test {
+            // Save to different key - should not emit
+            repository.savePreference("other_key", "value")
+
+            // Save to specific key - should emit
+            repository.savePreference("specific_key", "value")
+            val change = awaitItem()
+            assertTrue(change is DataStoreChangeEvent.ValueAdded)
+            assertEquals("specific_key", change.key)
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+
+    @Test
+    fun observeAllKeys_ReactsToKeyChanges() = runTest(testDispatcher) {
+        repository.observeAllKeys().test {
+            // Initial empty set (from onStart emission)
+            assertEquals(emptySet(), awaitItem())
+            advanceUntilIdle()
+            delay(100) // Ensure we wait for any initial emissions
+
+            // Add preferences
+            repository.savePreference("key1", "value1")
+            assertEquals(setOf("key1"), awaitItem())
+
+            repository.savePreference("key2", "value2")
+            assertEquals(setOf("key1", "key2"), awaitItem())
+
+            // Remove preference
+            repository.removePreference("key1")
+            assertEquals(setOf("key2"), awaitItem())
+
+            // Clear all
+            repository.clearAllPreferences()
+            assertEquals(emptySet(), awaitItem())
+        }
+    }
+
+    @Test
+    fun observePreferenceCount_ReactsToSizeChanges() = runTest(testDispatcher) {
+        repository.observePreferenceCount().test {
+            // Initial count (from onStart emission)
+            assertEquals(0, awaitItem())
+
+            // Add preferences
+            repository.savePreference("key1", "value1")
+            assertEquals(1, awaitItem())
+
+            repository.savePreference("key2", "value2")
+            assertEquals(2, awaitItem())
+
+            // Clear all
+            repository.clearAllPreferences()
+            assertEquals(0, awaitItem())
+
+            cancelAndIgnoreRemainingEvents()
+        }
+    }
+}

core-base/datastore/src/commonTest/kotlin/template/core/base/datastore/serialization/JsonSerializationStrategyTest.kt

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.serialization
+
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.Json
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+class JsonSerializationStrategyTest {
+    private val strategy = JsonSerializationStrategy(Json { encodeDefaults = true })
+
+    @Serializable
+    data class Data(val id: Int, val name: String)
+
+    @Test
+    fun serializeAndDeserialize_Success() = kotlinx.coroutines.test.runTest {
+        val data = Data(1, "abc")
+        val serialized = strategy.serialize(data, Data.serializer())
+        assertTrue(serialized.isSuccess)
+        val deserialized = strategy.deserialize(serialized.getOrThrow(), Data.serializer())
+        assertTrue(deserialized.isSuccess)
+        assertEquals(data, deserialized.getOrThrow())
+    }
+
+    @Test
+    fun deserialize_FailureOnCorruptData() = kotlinx.coroutines.test.runTest {
+        val result = strategy.deserialize("not a json", Data.serializer())
+        assertTrue(result.isFailure)
+    }
+}

core-base/datastore/src/commonTest/kotlin/template/core/base/datastore/validation/DefaultPreferencesValidatorTest.kt

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.datastore.validation
+
+import kotlin.test.Test
+import kotlin.test.assertTrue
+
+class DefaultPreferencesValidatorTest {
+    private val validator = DefaultPreferencesValidator()
+
+    @Test
+    fun validateKey_AcceptsValidKey() {
+        val result = validator.validateKey("validKey")
+        assertTrue(result.isSuccess)
+    }
+
+    @Test
+    fun validateKey_RejectsEmptyKey() {
+        val result = validator.validateKey("")
+        assertTrue(result.isFailure)
+    }
+
+    @Test
+    fun validateValue_AcceptsNonNull() {
+        val result = validator.validateValue(123)
+        assertTrue(result.isSuccess)
+    }
+
+    @Test
+    fun validateValue_RejectsNull() {
+        val result = validator.validateValue(null)
+        assertTrue(result.isFailure)
+    }
+}

core-base/designsystem/.gitignore

@@ -0,0 +1 @@
+/build

core-base/designsystem/README.md

@@ -0,0 +1,341 @@
+# KPT Design System
+
+A comprehensive, Kotlin Multiplatform design system built on top of Material3, providing reusable UI components, theming
+capabilities, and layout primitives for building consistent user interfaces across platforms.
+
+## 🌟 Overview
+
+The KPT Design System offers a robust foundation for building modern applications with:
+
+- **Consistent theming** across all platforms
+- **Responsive layouts** that adapt to different screen sizes
+- **Material3 integration** with custom design tokens
+- **Component composition** with flexible configuration
+- **Type-safe APIs** with Kotlin DSL builders
+
+## 🎯 Key Features
+
+- **🎨 Comprehensive Theming**: Complete design token system with color, typography, spacing, shapes, and elevation
+- **📱 Responsive Design**: Adaptive layouts that work across phones, tablets, and desktop
+- **🔧 Material3 Integration**: Seamless integration with Material3 components
+- **⚡ Type Safety**: Kotlin DSL builders with compile-time safety
+- **🎭 Consistent Animations**: Material Motion compliant animation specifications
+- **🧩 Composable Architecture**: Flexible component composition with configuration objects
+- **🌗 Dark Mode Support**: Built-in support for light and dark themes
+- **♿ Accessibility**: Semantic properties and content descriptions throughout
+- **🧪 Testing Support**: Test tags and testing utilities included
+
+## 📦 Module Structure
+
+```
+designsystem/
+├── component/          # UI Components
+│   ├── KptTopAppBar.kt
+│   ├── KptAnimationSpecs.kt
+│   └── ...
+├── core/              # Core abstractions
+│   ├── KptComponent.kt
+│   ├── ComponentStateHolder.kt
+│   └── ...
+├── layout/            # Layout components
+│   ├── KptResponsiveLayout.kt
+│   ├── KptGrid.kt
+│   └── ...
+├── theme/             # Theme implementation
+│   └── KptColorSchemeImpl.kt
+├── KptTheme.kt        # Main theme composable
+├── KptMaterialTheme.kt # Material3 integration
+└── KptThemeExtensions.kt # Utility extensions
+```
+
+## 🏗️ Architecture
+
+```mermaid
+graph TB
+    subgraph "KPT Design System Architecture"
+        Core[Core Interfaces & Abstractions]
+        Theme[Theme System]
+        Components[UI Components]
+        Layout[Layout System]
+        Extensions[Material3 Extensions]
+        Core --> Theme
+        Core --> Components
+        Core --> Layout
+        Theme --> Components
+        Theme --> Extensions
+        Components --> Layout
+        Extensions --> Components
+    end
+
+    subgraph "Theme System"
+        Colors[KptColorScheme]
+        Typography[KptTypography]
+        Shapes[KptShapes]
+        Spacing[KptSpacing]
+        Elevation[KptElevation]
+        Provider[KptThemeProvider]
+        Provider --> Colors
+        Provider --> Typography
+        Provider --> Shapes
+        Provider --> Spacing
+        Provider --> Elevation
+    end
+
+    subgraph "Component System"
+        BaseComponent[KptComponent]
+        TopAppBar[KptTopAppBar]
+        Animation[Animation Components]
+        Loading[Loading States]
+        BaseComponent --> Scaffold
+        BaseComponent --> TopAppBar
+        BaseComponent --> Animation
+        BaseComponent --> Loading
+    end
+```
+
+## 🎨 Theme System
+
+The KPT Design System provides a comprehensive theming solution that extends Material3 design tokens:
+
+### Color Scheme
+
+```kotlin
+val customTheme = kptTheme {
+    colors {
+        primary = Color(0xFF6750A4)
+        onPrimary = Color.White
+        background = Color(0xFFFFFBFE)
+        // ... other colors
+    }
+}
+```
+
+### Typography Scale
+
+```kotlin
+kptTheme {
+    typography {
+        titleLarge = TextStyle(
+            fontSize = 22.sp,
+            fontWeight = FontWeight.Bold
+        )
+        // ... other text styles
+    }
+}
+```
+
+### Spacing System
+
+```kotlin
+// Predefined spacing scale
+KptTheme.spacing.xs    // 4.dp
+KptTheme.spacing.sm    // 8.dp  
+KptTheme.spacing.md    // 16.dp
+KptTheme.spacing.lg    // 24.dp
+KptTheme.spacing.xl    // 32.dp
+KptTheme.spacing.xxl   // 64.dp
+```
+
+## 🔧 Setup & Integration
+
+### Basic Setup
+
+```kotlin
+@Composable
+fun App() {
+    KptMaterialTheme {
+        // Your app content
+        NavHost(navController, startDestination = "home") {
+            composable("home") { HomeScreen() }
+            // ... other destinations
+        }
+    }
+}
+```
+
+### Custom Theme Setup
+
+```kotlin
+@Composable
+fun App() {
+    val customTheme = kptTheme {
+        colors {
+            primary = Color(0xFF1976D2)
+            onPrimary = Color.White
+        }
+        typography {
+            titleLarge = titleLarge.copy(fontSize = 24.sp)
+        }
+        spacing {
+            md = 20.dp
+        }
+    }
+
+    KptMaterialTheme(theme = customTheme) {
+        // App content with custom theme
+    }
+}
+```
+
+### Dark Theme Support
+
+```kotlin
+@Composable
+fun App() {
+    val lightTheme = kptTheme { /* light theme config */ }
+    val darkTheme = kptTheme { /* dark theme config */ }
+
+    KptMaterialTheme(
+        lightTheme = lightTheme,
+        darkThemeProvider = darkTheme
+    ) {
+        // Automatically switches based on system preference
+    }
+}
+```
+
+## 🧩 Components(Demo)
+
+### KptTopAppBar
+
+Flexible top app bar with multiple variants:
+
+```kotlin
+// Simple top app bar
+KptTopAppBar(title = "Title")
+
+// With navigation and actions
+KptTopAppBar(
+    title = "Title",
+    onNavigationIconClick = { navController.navigateUp() },
+    actionIcon = Icons.Default.Search,
+    onActionClick = { openSearch() }
+)
+
+// Using configuration builder
+KptTopAppBar(
+    kptTopAppBar {
+        title = "Settings"
+        variant = TopAppBarVariant.Large
+        navigationIcon = Icons.AutoMirrored.Filled.ArrowBack
+        onNavigationClick = { navController.navigateUp() }
+
+        action(Icons.Default.Search, "Search") { openSearch() }
+        action(Icons.Default.MoreVert, "More") { openMenu() }
+    }
+)
+```
+
+## 📱 Responsive Layout System
+
+The design system includes responsive layout components that adapt to different screen sizes:
+
+```mermaid
+graph LR
+    subgraph "Screen Size Breakpoints"
+        Compact["Compact < 600dp"]
+        Medium["Medium 600-840dp"]
+        Expanded["Expanded ≥ 840dp"]
+    end
+
+    subgraph "Layout Components"
+        ResponsiveLayout[KptResponsiveLayout]
+        Grid[KptGrid]
+        FlowRow[KptFlowRow]
+        SplitPane[KptSplitPane]
+        SidebarLayout[KptSidebarLayout]
+    end
+
+    Compact --> ResponsiveLayout
+    Medium --> ResponsiveLayout
+    Expanded --> ResponsiveLayout
+    ResponsiveLayout --> Grid
+    ResponsiveLayout --> FlowRow
+    ResponsiveLayout --> SplitPane
+    ResponsiveLayout --> SidebarLayout
+```
+
+### Usage Example
+
+```kotlin
+KptResponsiveLayout(
+    compact = {
+        // Single column layout for phones
+        LazyColumn { /* items */ }
+    },
+    medium = {
+        // Two column layout for tablets
+        Row {
+            LazyColumn(modifier = Modifier.weight(1f)) { /* left */ }
+            LazyColumn(modifier = Modifier.weight(1f)) { /* right */ }
+        }
+    },
+    expanded = {
+        // Three column layout for desktop
+        KptSidebarLayout {
+            sidebar { NavigationRail() }
+            content {
+                Row {
+                    LazyColumn(modifier = Modifier.weight(2f)) { /* main */ }
+                    LazyColumn(modifier = Modifier.weight(1f)) { /* aside */ }
+                }
+            }
+        }
+    }
+)
+```
+
+## 🎭 Animation System
+
+Consistent animation specifications following Material Motion guidelines:
+
+```kotlin
+object KptAnimationSpecs {
+    val fast = tween<Float>(150, FastOutSlowInEasing)
+    val medium = tween<Float>(300, FastOutSlowInEasing)
+    val slow = tween<Float>(500, FastOutSlowInEasing)
+
+    // Material Motion easing curves
+    val emphasizedEasing = CubicBezierEasing(0.2f, 0.0f, 0.0f, 1.0f)
+    val standardEasing = CubicBezierEasing(0.2f, 0.0f, 0.0f, 1.0f)
+}
+```
+
+## 🧪 Component State Management
+
+The design system provides utilities for managing component state:
+
+```kotlin
+@Composable
+fun MyComponent() {
+    val state = rememberComponentState(initialValue = false)
+
+    Button(
+        onClick = { state.update(!state.value) }
+    ) {
+        Text(if (state.value) "Enabled" else "Disabled")
+    }
+}
+```
+
+## 🤝 Contributing
+
+1. Follow the existing code style and patterns
+2. Add comprehensive KDoc documentation to new components
+3. Include usage examples in component documentation
+4. Test components across different screen sizes
+5. Ensure accessibility compliance with semantic properties
+
+## 📄 License
+
+```
+Copyright 2025 Mifos Initiative
+
+This Source Code Form is subject to the terms of the Mozilla Public
+License, v. 2.0. If a copy of the MPL was not distributed with this
+file, You can obtain one at https://mozilla.org/MPL/2.0/.
+```
+
+---
+
+**Built with ❤️ for the Kotlin Multiplatform community**

core-base/designsystem/build.gradle.kts

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+plugins {
+    alias(libs.plugins.mifos.kmp.library)
+    alias(libs.plugins.jetbrainsCompose)
+    alias(libs.plugins.compose.compiler)
+}
+
+android {
+    namespace = "template.core.base.designsystem"
+}
+
+kotlin {
+    sourceSets{
+        androidMain.dependencies {
+            implementation(libs.androidx.compose.ui.tooling)
+        }
+        commonMain.dependencies {
+            implementation(compose.ui)
+            implementation(compose.material3)
+            implementation(compose.foundation)
+            implementation(compose.components.resources)
+            implementation(compose.components.uiToolingPreview)
+            implementation(compose.materialIconsExtended)
+
+            api(compose.material3AdaptiveNavigationSuite)
+            api(libs.jetbrains.compose.material3.adaptive)
+            api(libs.jetbrains.compose.material3.adaptive.layout)
+            api(libs.jetbrains.compose.material3.adaptive.navigation)
+
+            implementation(libs.jb.lifecycleViewmodel)
+            implementation(libs.window.size)
+            implementation(libs.ui.backhandler)
+        }
+    }
+}
+
+compose.resources {
+    publicResClass = true
+    generateResClass = always
+    packageOfResClass = "template.core.base.designsystem.generated.resources"
+}

core-base/designsystem/src/commonMain/kotlin/template/core/base/designsystem/KptMaterialTheme.kt

@@ -0,0 +1,184 @@
+/*
+ * Copyright 2025 Mifos Initiative
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ *
+ * See https://github.com/openMF/mobile-mobile/blob/master/LICENSE.md
+ */
+package template.core.base.designsystem
+
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.foundation.shape.CornerSize
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Shapes
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import template.core.base.designsystem.core.KptThemeProvider
+import template.core.base.designsystem.theme.KptTheme
+import template.core.base.designsystem.theme.KptThemeProviderImpl
+import template.core.base.designsystem.theme.LocalKptColors
+import template.core.base.designsystem.theme.LocalKptElevation
+import template.core.base.designsystem.theme.LocalKptShapes
+import template.core.base.designsystem.theme.LocalKptSpacing
+import template.core.base.designsystem.theme.LocalKptTypography
+import template.core.base.designsystem.theme.kptTheme
+
+/**
+ * KptMaterialTheme provides Material3 integration for KptTheme.
+ * This composable applies KptTheme values to MaterialTheme automatically,
+ * making all Material3 components use KptTheme design tokens.
+ *
+ * @param theme KptThemeProvider instance containing design tokens
+ * @param content The composable content that will have access to both KptTheme and MaterialTheme
+ *
+ * @sample KptMaterialThemeUsageExample
+ */
+@Composable
+fun KptMaterialTheme(
+    theme: KptThemeProvider = KptThemeProviderImpl(),
+    content: @Composable () -> Unit,
+) {
+    // Convert KptTheme values to Material3 equivalents
+    val materialColorScheme = theme.colors.toMaterial3ColorScheme()
+    val materialTypography = theme.typography.toMaterial3Typography()
+    val materialShapes = theme.shapes.toMaterial3Shapes()
+
+    // Provide both KptTheme composition locals and MaterialTheme
+    CompositionLocalProvider(
+        LocalKptColors provides theme.colors,
+        LocalKptTypography provides theme.typography,
+        LocalKptShapes provides theme.shapes,
+        LocalKptSpacing provides theme.spacing,
+        LocalKptElevation provides theme.elevation,
+    ) {
+        MaterialTheme(
+            colorScheme = materialColorScheme,
+            typography = materialTypography,
+            shapes = materialShapes,
+            content = content,
+        )
+    }
+}
+
+/**
+ * KptMaterialTheme with dark theme support.
+ * Provides automatic light/dark theme switching with Material3 integration.
+ *
+ * @param darkTheme Whether to use dark theme. Defaults to system preference.
+ * @param lightTheme KptThemeProvider for light theme
+ * @param darkTheme KptThemeProvider for dark theme
+ * @param content The composable content that will have access to both KptTheme and MaterialTheme
+ *
+ * @sample KptMaterialThemeWithDarkModeExample
+ */
+@Composable
+fun KptMaterialTheme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    lightTheme: KptThemeProvider = KptThemeProviderImpl(),
+    darkThemeProvider: KptThemeProvider = KptThemeProviderImpl(),
+    content: @Composable () -> Unit,
+) {
+    val selectedTheme = if (darkTheme) darkThemeProvider else lightTheme
+    KptMaterialTheme(
+        theme = selectedTheme,
+        content = content,
+    )
+}
+
+/**
+ * DSL builder for creating KptMaterialTheme with custom configuration
+ */
+@Composable
+fun KptMaterialTheme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    themeBuilder: @Composable (Boolean) -> KptThemeProvider,
+    content: @Composable () -> Unit,
+) {
+    val theme = themeBuilder(darkTheme)
+    KptMaterialTheme(
+        theme = theme,
+        content = content,
+    )
+}
+
+// region Usage Examples (for documentation)
+
+/**
+ * Example of basic KptMaterialTheme usage
+ */
+@Composable
+private fun KptMaterialThemeUsageExample() {
+    KptMaterialTheme {
+        // All Material3 components will use KptTheme values
+        MaterialTheme.colorScheme.primary // = KptTheme.colorScheme.primary
+        MaterialTheme.typography.titleLarge // = KptTheme.typography.titleLarge
+        MaterialTheme.shapes.medium // = KptTheme.shapes.medium
+
+        // KptTheme values are also available directly
+        KptTheme.spacing.md
+        KptTheme.elevation.level2
+    }
+}
+
+/**
+ * Example of KptMaterialTheme with dark mode support
+ */
+@Composable
+private fun KptMaterialThemeWithDarkModeExample() {
+    val lightTheme = kptTheme {
+        colors {
+            primary = Color.Blue
+        }
+    }
+
+    val darkTheme = kptTheme {
+        colors {
+            primary = Color.Cyan
+        }
+    }
+
+    KptMaterialTheme(
+        lightTheme = lightTheme,
+        darkThemeProvider = darkTheme,
+    ) {
+        // Theme automatically switches based on system preference
+        // Material3 components inherit the appropriate theme
+    }
+}
+
+/**
+ * Example of KptMaterialTheme with DSL builder
+ */
+@Composable
+private fun KptMaterialThemeBuilderExample() {
+    KptMaterialTheme(
+        themeBuilder = { isDark ->
+            kptTheme {
+                colors {
+                    if (isDark) {
+                        primary = Color.Cyan
+                        background = Color.Black
+                    } else {
+                        primary = Color.Blue
+                        background = Color.White
+                    }
+                }
+                typography {
+                    titleLarge = titleLarge.copy(fontSize = 24.sp)
+                }
+                shapes {
+                    medium = Shapes().medium.copy(all = CornerSize(16.dp))
+                }
+            }
+        },
+    ) {
+        // Dynamic theme based on dark mode
+    }
+}
+
+// endregion