diff --git a/.github/actions/branch-specific-config/action.yml b/.github/actions/branch-specific-config/action.yml
new file mode 100644
index 0000000..9ea23bf
--- /dev/null
+++ b/.github/actions/branch-specific-config/action.yml
@@ -0,0 +1,75 @@
+name: 'branch-specific-config'
+description: 'Determine branch-specific configuration'
+outputs:
+  branch-name:
+    description: "Branch name"
+    value: ${{ steps.branch-specific-config.outputs.branch-name }}
+  image-rev:
+    description: "Docker image revision"
+    value: ${{ steps.branch-specific-config.outputs.image-rev }}
+  env:
+    description: "Environment"
+    value: ${{ steps.branch-specific-config.outputs.env }}
+  tf-workingdir:
+    description: "Terraform working directory"
+    value: ${{ steps.branch-specific-config.outputs.tf-workingdir }}
+  tf-lockfile:
+    description: "Terraform lockfile"
+    value: ${{ steps.branch-specific-config.outputs.tf-lockfile }}
+  docker-load:
+    description: "Docker load"
+    value: ${{ steps.branch-specific-config.outputs.docker-load }}
+  docker-push:
+    description: "Docker push"
+    value: ${{ steps.branch-specific-config.outputs.docker-push }}
+  manifests-dir:
+    description: "Manifests directory for the environment"
+    value: ${{ steps.branch-specific-config.outputs.manifests-dir }}
+
+runs:
+  using: "composite"
+  steps:
+    - name: Branch specific config
+      id: branch-specific-config
+      run: |
+        set -euxo pipefail
+
+        PREFIX="refs/heads/"
+        BRANCH_NAME="${GITHUB_REF#"$PREFIX"}"
+
+        ret=0
+        git ls-remote --exit-code origin staging || ret=$?
+        if [ "${BRANCH_NAME}" = "main" ] || [ "${ret}" -eq 2 ]; then
+            echo "Running production build or running build in repo without a staging branch"
+            IMAGE_REV="latest"
+            ENV="prod"
+        else
+            echo "Running staging build"
+            IMAGE_REV="staging"
+            ENV="stg"
+        fi
+        
+        TF_WD="terraform/workspaces/${ENV}"
+
+        TF_LF="${TF_WD}/.terraform.lock.hcl"
+
+        DOCKER_LOAD="false"
+        DOCKER_PUSH="true"
+
+        if [ "${GITHUB_EVENT_NAME}" = "pull_request" ]; then
+          echo "Running a pull request - Load Docker image only, no push"
+          DOCKER_LOAD="true"
+          DOCKER_PUSH="false"
+        fi
+        
+        MANIFESTS_DIR="manifests/${ENV}"
+
+        echo "::set-output name=branch-name::$(echo $BRANCH_NAME)"
+        echo "::set-output name=image-rev::$(echo $IMAGE_REV)"
+        echo "::set-output name=env::$(echo $ENV)"
+        echo "::set-output name=tf-workingdir::$(echo $TF_WD)"
+        echo "::set-output name=tf-lockfile::$(echo $TF_LF)"
+        echo "::set-output name=docker-load::$(echo $DOCKER_LOAD)"
+        echo "::set-output name=docker-push::$(echo $DOCKER_PUSH)"
+        echo "::set-output name=manifests-dir::$(echo $MANIFESTS_DIR)"
+      shell: bash
\ No newline at end of file