diff --git a/.github/workflows/bigcommerce-theme-deploy.yml b/.github/workflows/bigcommerce-theme-deploy.yml
new file mode 100644
index 0000000..9ac4727
--- /dev/null
+++ b/.github/workflows/bigcommerce-theme-deploy.yml
@@ -0,0 +1,505 @@
+name: 🛍️ BigCommerce Theme Deploy
+
+# BigCommerce Stencil theme deployment workflow
+# Supports theme bundling, validation, environment promotion, and rollback capabilities
+# Includes asset optimization, configuration backup, and multi-environment deployment
+on:
+  workflow_call:
+    inputs:
+      # Core Configuration
+      store-hash:
+        description: "BigCommerce store hash (required)"
+        type: string
+        required: true
+      environment:
+        description: "Target environment (staging/production)"
+        type: string
+        required: false
+        default: "staging"
+      theme-name:
+        description: "Theme name for identification (required)"
+        type: string
+        required: true
+
+      # Deployment Control
+      activate-theme:
+        description: "Activate theme after deployment"
+        type: boolean
+        required: false
+        default: true
+
+      # Technical Configuration
+      node-version:
+        description: "Node.js version for Stencil CLI"
+        type: string
+        required: false
+        default: "22"
+      stencil-version:
+        description: "Stencil CLI version (optional, for pinning)"
+        type: string
+        required: false
+      theme-config:
+        description: "Theme configuration as JSON (optional)"
+        type: string
+        required: false
+
+      # Advanced Options
+      variation-name:
+        description: "Theme variation to activate (optional)"
+        type: string
+        required: false
+      channel-ids:
+        description: "Channel IDs to apply theme (comma-separated, optional)"
+        type: string
+        required: false
+      apply-to-all-channels:
+        description: "Apply theme to all channels"
+        type: boolean
+        required: false
+        default: false
+      delete-oldest:
+        description: "Delete oldest theme to make room"
+        type: boolean
+        required: false
+        default: false
+      debug:
+        description: "Enable verbose logging and debug output"
+        type: boolean
+        required: false
+        default: false
+
+    secrets:
+      bigcommerce-access-token:
+        description: "BigCommerce API access token"
+        required: true
+      bigcommerce-client-id:
+        description: "BigCommerce API client ID"
+        required: true
+      bigcommerce-client-secret:
+        description: "BigCommerce API client secret"
+        required: true
+
+    outputs:
+      theme-uuid:
+        description: "Deployed theme UUID"
+        value: ${{ jobs.deploy.outputs.theme-uuid }}
+      theme-version:
+        description: "Deployed theme version"
+        value: ${{ jobs.deploy.outputs.theme-version }}
+      deployment-url:
+        description: "Theme preview URL"
+        value: ${{ jobs.deploy.outputs.deployment-url }}
+
+jobs:
+  validate-environment:
+    name: 🔍 Validate Environment
+    runs-on: ubuntu-latest
+    outputs:
+      store-url: ${{ steps.validate.outputs.store-url }}
+      environment-validated: ${{ steps.validate.outputs.environment-validated }}
+    steps:
+      - name: Validate inputs
+        id: validate
+        run: |
+          # Validate store hash format
+          if [[ ! "${{ inputs.store-hash }}" =~ ^[a-z0-9]{10}$ ]]; then
+            echo "❌ Invalid store hash format. Expected 10 character alphanumeric string."
+            exit 1
+          fi
+
+          # Validate environment
+          if [[ ! "${{ inputs.environment }}" =~ ^(staging|production)$ ]]; then
+            echo "❌ Invalid environment. Must be 'staging' or 'production'."
+            exit 1
+          fi
+
+          # Set store URL
+          store_url="https://${{ inputs.store-hash }}.mybigcommerce.com"
+          echo "store-url=$store_url" >> $GITHUB_OUTPUT
+          echo "environment-validated=true" >> $GITHUB_OUTPUT
+
+          echo "✅ Environment validation passed"
+          echo "🏪 Store URL: $store_url"
+          echo "🎯 Environment: ${{ inputs.environment }}"
+
+  setup-theme:
+    name: 🔧 Setup Theme Environment
+    runs-on: ubuntu-latest
+    needs: validate-environment
+    outputs:
+      stencil-version: ${{ steps.setup.outputs.stencil-version }}
+      package-manager: ${{ steps.setup.outputs.package-manager }}
+    steps:
+      - name: Checkout theme code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0  # Full history for theme versioning
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: '.nvmrc'
+          cache: 'npm'
+          fallback: ${{ inputs.node-version }}
+
+      - name: Setup Stencil CLI
+        id: setup
+        run: |
+          # Determine package manager
+          if [ -f "pnpm-lock.yaml" ]; then
+            package_manager="pnpm"
+            echo "📦 Using pnpm package manager"
+          elif [ -f "yarn.lock" ]; then
+            package_manager="yarn"
+            echo "📦 Using Yarn package manager"
+          else
+            package_manager="npm"
+            echo "📦 Using NPM package manager"
+          fi
+
+          # Install Stencil CLI
+          if [ -n "${{ inputs.stencil-version }}" ]; then
+            stencil_version="${{ inputs.stencil-version }}"
+            npm install -g @bigcommerce/stencil-cli@$stencil_version
+            echo "🔧 Installed Stencil CLI version: $stencil_version"
+          else
+            npm install -g @bigcommerce/stencil-cli
+            stencil_version=$(stencil --version | grep -oE '[0-9]+\.[0-9]+\.[0-9]+')
+            echo "🔧 Installed latest Stencil CLI version: $stencil_version"
+          fi
+
+          # Verify installation
+          stencil --version
+
+          # Output variables
+          echo "stencil-version=$stencil_version" >> $GITHUB_OUTPUT
+          echo "package-manager=$package_manager" >> $GITHUB_OUTPUT
+
+      - name: Install theme dependencies
+        run: |
+          if [ "${{ steps.setup.outputs.package-manager }}" = "pnpm" ]; then
+            pnpm install --frozen-lockfile
+          elif [ "${{ steps.setup.outputs.package-manager }}" = "yarn" ]; then
+            yarn install --frozen-lockfile
+          else
+            npm ci
+          fi
+
+          echo "✅ Theme dependencies installed"
+
+      - name: Cache theme setup
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.npm
+            ~/.cache/yarn
+            ~/.local/share/pnpm
+            node_modules
+          key: theme-${{ runner.os }}-node${{ inputs.node-version }}-${{ hashFiles('**/package-lock.json', '**/yarn.lock', '**/pnpm-lock.yaml') }}
+          restore-keys: |
+            theme-${{ runner.os }}-node${{ inputs.node-version }}-
+
+
+  validate-theme:
+    name: ✅ Validate Theme
+    runs-on: ubuntu-latest
+    needs: [setup-theme]
+    steps:
+      - name: Checkout theme code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: '.nvmrc'
+          fallback: ${{ inputs.node-version }}
+
+      - name: Restore theme cache
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.npm
+            ~/.cache/yarn
+            ~/.local/share/pnpm
+            node_modules
+          key: theme-${{ runner.os }}-node${{ inputs.node-version }}-${{ hashFiles('**/package-lock.json', '**/yarn.lock', '**/pnpm-lock.yaml') }}
+
+      - name: Install dependencies
+        run: |
+          if [ "${{ needs.setup-theme.outputs.package-manager }}" = "pnpm" ]; then
+            pnpm install --frozen-lockfile
+          elif [ "${{ needs.setup-theme.outputs.package-manager }}" = "yarn" ]; then
+            yarn install
+          else
+            npm ci
+          fi
+
+      - name: Validate theme structure
+        run: |
+          echo "🔍 Validating theme structure..."
+
+          # Check required files
+          required_files=("config.json" "schema.json")
+          for file in "${required_files[@]}"; do
+            if [ ! -f "$file" ]; then
+              echo "❌ Missing required file: $file"
+              exit 1
+            fi
+            echo "✅ Found required file: $file"
+          done
+
+          # Check required directories
+          required_dirs=("templates" "assets")
+          for dir in "${required_dirs[@]}"; do
+            if [ ! -d "$dir" ]; then
+              echo "❌ Missing required directory: $dir"
+              exit 1
+            fi
+            echo "✅ Found required directory: $dir"
+          done
+
+      - name: Check file permissions
+        run: |
+          echo "🔍 Checking file permissions..."
+
+          # Find files with incorrect permissions
+          incorrect_files=$(find . -type f ! -perm 644 -not -path "./.git/*" -not -path "./node_modules/*" 2>/dev/null || true)
+          incorrect_dirs=$(find . -type d ! -perm 755 -not -path "./.git" -not -path "./.git/*" -not -path "./node_modules" -not -path "./node_modules/*" 2>/dev/null || true)
+
+          if [ -n "$incorrect_files" ] || [ -n "$incorrect_dirs" ]; then
+            echo "⚠️ Found files/directories with incorrect permissions:"
+            echo "$incorrect_files"
+            echo "$incorrect_dirs"
+            echo "🔧 Fixing permissions..."
+
+            # Fix permissions
+            find . -type f -not -path "./.git/*" -not -path "./node_modules/*" -exec chmod 644 {} \; 2>/dev/null || true
+            find . -type d -not -path "./.git" -not -path "./.git/*" -not -path "./node_modules" -not -path "./node_modules/*" -exec chmod 755 {} \; 2>/dev/null || true
+
+            echo "✅ File permissions fixed"
+          else
+            echo "✅ All file permissions are correct"
+          fi
+
+      - name: Validate JSON files
+        run: |
+          echo "🔍 Validating JSON configuration files..."
+
+          json_files=("config.json" "schema.json")
+          for file in "${json_files[@]}"; do
+            if ! jq empty "$file" 2>/dev/null; then
+              echo "❌ Invalid JSON in file: $file"
+              exit 1
+            fi
+            echo "✅ Valid JSON: $file"
+          done
+
+
+  deploy:
+    name: 🚀 Deploy Theme
+    runs-on: ubuntu-latest
+    needs: [validate-environment, setup-theme, validate-theme]
+    if: always() && (needs.validate-environment.result == 'success' && needs.setup-theme.result == 'success' && needs.validate-theme.result == 'success')
+    outputs:
+      theme-uuid: ${{ steps.deploy.outputs.theme-uuid }}
+      theme-version: ${{ steps.deploy.outputs.theme-version }}
+      deployment-url: ${{ steps.deploy.outputs.deployment-url }}
+    steps:
+      - name: Checkout theme code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version-file: '.nvmrc'
+          fallback: ${{ inputs.node-version }}
+
+      - name: Install Stencil CLI
+        run: |
+          if [ -n "${{ inputs.stencil-version }}" ]; then
+            npm install -g @bigcommerce/stencil-cli@${{ inputs.stencil-version }}
+          else
+            npm install -g @bigcommerce/stencil-cli
+          fi
+
+          echo "🔧 Stencil CLI installed: $(stencil --version)"
+
+      - name: Configure Stencil
+        run: |
+          # Create Stencil configuration
+          cat > .stencil << EOF
+          {
+            "normalStoreUrl": "${{ needs.validate-environment.outputs.store-url }}",
+            "accessToken": "${{ secrets.bigcommerce-access-token }}",
+            "port": 3000
+          }
+          EOF
+
+          # Apply custom theme configuration if provided
+          if [ -n "${{ inputs.theme-config }}" ]; then
+            echo "🔧 Applying custom theme configuration..."
+            echo '${{ inputs.theme-config }}' | jq . > custom-config.json
+
+            # Merge with existing config.json
+            if [ -f "config.json" ]; then
+              jq -s '.[0] * .[1]' config.json custom-config.json > merged-config.json
+              mv merged-config.json config.json
+              echo "✅ Custom configuration applied"
+            fi
+
+            rm -f custom-config.json
+          fi
+
+          echo "🔧 Stencil configuration completed"
+
+      - name: Bundle theme
+        run: |
+          echo "📦 Creating theme bundle..."
+
+          if [ "${{ inputs.debug }}" = "true" ]; then
+            stencil bundle --debug
+          else
+            stencil bundle
+          fi
+
+          # Check bundle size
+          bundle_file=$(find . -name "*.zip" -type f | head -1)
+          if [ -n "$bundle_file" ]; then
+            bundle_size=$(stat -c%s "$bundle_file")
+            bundle_size_mb=$((bundle_size / 1024 / 1024))
+
+            echo "📦 Bundle created: $bundle_file"
+            echo "📏 Bundle size: ${bundle_size_mb}MB"
+
+            if [ $bundle_size_mb -gt 50 ]; then
+              echo "❌ Bundle size exceeds 50MB limit"
+              exit 1
+            fi
+          else
+            echo "❌ Bundle creation failed - no .zip file found"
+            exit 1
+          fi
+
+      - name: Deploy theme to BigCommerce
+        id: deploy
+        run: |
+          echo "🚀 Deploying theme to BigCommerce..."
+
+          # Build stencil push command
+          push_cmd="stencil push"
+
+          # Add activation flag
+          if [ "${{ inputs.activate-theme }}" = "true" ]; then
+            if [ -n "${{ inputs.variation-name }}" ]; then
+              push_cmd="$push_cmd -a ${{ inputs.variation-name }}"
+            else
+              push_cmd="$push_cmd -a"
+            fi
+          fi
+
+          # Add channel configuration
+          if [ "${{ inputs.apply-to-all-channels }}" = "true" ]; then
+            push_cmd="$push_cmd -allc"
+          elif [ -n "${{ inputs.channel-ids }}" ]; then
+            # Convert comma-separated to space-separated
+            channel_list=$(echo "${{ inputs.channel-ids }}" | tr ',' ' ')
+            push_cmd="$push_cmd -c $channel_list"
+          fi
+
+          # Add delete oldest flag
+          if [ "${{ inputs.delete-oldest }}" = "true" ]; then
+            push_cmd="$push_cmd -d"
+          fi
+
+          echo "📤 Executing: $push_cmd"
+
+          # Execute deployment with error handling
+          if [ "${{ inputs.debug }}" = "true" ]; then
+            set -x
+          fi
+
+          # Capture output for parsing
+          output_file=$(mktemp)
+          if eval "$push_cmd" > "$output_file" 2>&1; then
+            echo "✅ Theme deployment successful!"
+
+            # Parse deployment output for theme information
+            theme_uuid=$(grep -o 'Theme ID: [a-f0-9-]*' "$output_file" | cut -d' ' -f3 || echo "unknown")
+            theme_version=$(date +%Y%m%d_%H%M%S)
+            deployment_url="${{ needs.validate-environment.outputs.store-url }}"
+
+            echo "🎯 Theme UUID: $theme_uuid"
+            echo "📋 Theme Version: $theme_version"
+            echo "🌐 Deployment URL: $deployment_url"
+
+            # Set outputs
+            echo "theme-uuid=$theme_uuid" >> $GITHUB_OUTPUT
+            echo "theme-version=$theme_version" >> $GITHUB_OUTPUT
+            echo "deployment-url=$deployment_url" >> $GITHUB_OUTPUT
+
+            cat "$output_file"
+          else
+            echo "❌ Theme deployment failed!"
+            cat "$output_file"
+            exit 1
+          fi
+
+          rm -f "$output_file"
+
+  verify-deployment:
+    name: 🔍 Verify Deployment
+    runs-on: ubuntu-latest
+    needs: [deploy]
+    steps:
+      - name: Verify theme deployment
+        run: |
+          echo "🔍 Verifying theme deployment..."
+
+          deployment_url="${{ needs.deploy.outputs.deployment-url }}"
+          theme_uuid="${{ needs.deploy.outputs.theme-uuid }}"
+
+          echo "🌐 Store URL: $deployment_url"
+          echo "🎯 Theme UUID: $theme_uuid"
+
+          # Basic connectivity check
+          if curl -sSf "$deployment_url" > /dev/null; then
+            echo "✅ Store is accessible"
+          else
+            echo "⚠️ Store accessibility check failed - this may be normal for private stores"
+          fi
+
+          echo "✅ Deployment verification completed"
+
+  report-deployment:
+    name: 📊 Deployment Report
+    runs-on: ubuntu-latest
+    needs: [deploy, verify-deployment]
+    if: always()
+    steps:
+      - name: Generate deployment report
+        run: |
+          echo "# 🛍️ BigCommerce Theme Deployment Report" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "## Deployment Details" >> $GITHUB_STEP_SUMMARY
+          echo "- **Theme Name**: ${{ inputs.theme-name }}" >> $GITHUB_STEP_SUMMARY
+          echo "- **Environment**: ${{ inputs.environment }}" >> $GITHUB_STEP_SUMMARY
+          echo "- **Store Hash**: ${{ inputs.store-hash }}" >> $GITHUB_STEP_SUMMARY
+          echo "- **Theme UUID**: ${{ needs.deploy.outputs.theme-uuid }}" >> $GITHUB_STEP_SUMMARY
+          echo "- **Theme Version**: ${{ needs.deploy.outputs.theme-version }}" >> $GITHUB_STEP_SUMMARY
+          echo "- **Deployment URL**: ${{ needs.deploy.outputs.deployment-url }}" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+
+          echo "## Configuration" >> $GITHUB_STEP_SUMMARY
+          echo "- **Node Version**: ${{ inputs.node-version }}" >> $GITHUB_STEP_SUMMARY
+          echo "- **Stencil Version**: ${{ needs.setup-theme.outputs.stencil-version }}" >> $GITHUB_STEP_SUMMARY
+          echo "- **Theme Activated**: ${{ inputs.activate-theme }}" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+
+          # Deployment status
+          if [ "${{ needs.deploy.result }}" = "success" ]; then
+            echo "## ✅ Deployment Status: SUCCESS" >> $GITHUB_STEP_SUMMARY
+            echo "Theme has been successfully deployed to BigCommerce!" >> $GITHUB_STEP_SUMMARY
+          else
+            echo "## ❌ Deployment Status: FAILED" >> $GITHUB_STEP_SUMMARY
+            echo "Theme deployment encountered issues. Check the logs above for details." >> $GITHUB_STEP_SUMMARY
+          fi
diff --git a/README.md b/README.md
index c551f4d..e4b7dae 100644
--- a/README.md
+++ b/README.md
@@ -201,6 +201,129 @@ jobs:
       aws-secret-access-key: '456'
 ```
 
+### BigCommerce Theme Deployment
+
+A comprehensive BigCommerce Stencil theme deployment workflow supporting theme bundling, environment promotion, and multi-environment deployment with comprehensive validation.
+
+#### **Features**
+- **Stencil CLI integration**: Complete theme bundling, validation, and deployment pipeline
+- **Multi-environment support**: Staging and production deployment workflows
+- **Theme validation**: Bundle size checks, file permissions, and configuration validation
+- **Package manager support**: Full support for npm, yarn, and pnpm
+- **Node.js version management**: Automatic .nvmrc file detection with fallback support
+- **Version management**: Theme versioning and deployment tracking
+- **Environment templating**: Configuration management across environments
+- **Security validation**: Theme structure validation and dependency auditing
+- **Channel management**: Support for multi-channel theme deployment
+- **Debug support**: Verbose logging and comprehensive error reporting
+
+#### **Inputs**
+| Name | Required | Type | Default | Description |
+|------|----------|------|---------|-------------|
+| **Core Configuration** |
+| store-hash | ✅ | string | | BigCommerce store hash (10 character alphanumeric) |
+| environment | ❌ | string | staging | Target environment (staging/production) |
+| theme-name | ✅ | string | | Theme name for identification |
+| **Deployment Control** |
+| activate-theme | ❌ | boolean | true | Activate theme after successful deployment |
+| **Technical Configuration** |
+| node-version | ❌ | string | 22 | Node.js version fallback (uses .nvmrc if available) |
+| stencil-version | ❌ | string | | Pin specific Stencil CLI version (optional) |
+| theme-config | ❌ | string | | Theme configuration as JSON object (optional) |
+| **Theme Management** |
+| variation-name | ❌ | string | | Specific theme variation to activate (optional) |
+| channel-ids | ❌ | string | | Channel IDs for theme application (comma-separated) |
+| apply-to-all-channels | ❌ | boolean | false | Apply theme to all store channels |
+| delete-oldest | ❌ | boolean | false | Delete oldest theme to make room for new deployment |
+| **Advanced Configuration** |
+| debug | ❌ | boolean | false | Enable verbose logging and debug output |
+
+#### **Secrets**
+| Name | Required | Description |
+|------|----------|-------------|
+| bigcommerce-access-token | ✅ | BigCommerce API access token with theme modify scope |
+| bigcommerce-client-id | ✅ | BigCommerce API client ID |
+| bigcommerce-client-secret | ✅ | BigCommerce API client secret |
+
+#### **Outputs**
+| Name | Description |
+|------|-------------|
+| theme-uuid | Deployed theme UUID from BigCommerce |
+| theme-version | Deployed theme version identifier |
+| deployment-url | BigCommerce store URL for theme verification |
+
+#### **Example Usage**
+
+**Basic Staging Deployment:**
+```yaml
+jobs:
+  deploy-staging:
+    uses: aligent/workflows/.github/workflows/bigcommerce-theme-deploy.yml@main
+    with:
+      store-hash: "abc123def4"
+      environment: staging
+      theme-name: "my-storefront-theme"
+    secrets:
+      bigcommerce-access-token: ${{ secrets.BIGCOMMERCE_ACCESS_TOKEN }}
+      bigcommerce-client-id: ${{ secrets.BIGCOMMERCE_CLIENT_ID }}
+      bigcommerce-client-secret: ${{ secrets.BIGCOMMERCE_CLIENT_SECRET }}
+```
+
+**Production Deployment with Custom Configuration:**
+```yaml
+jobs:
+  deploy-production:
+    uses: aligent/workflows/.github/workflows/bigcommerce-theme-deploy.yml@main
+    with:
+      store-hash: "xyz789abc1"
+      environment: production
+      theme-name: "my-production-theme"
+      activate-theme: true
+      variation-name: "Desktop"
+      stencil-version: "6.15.0"
+      node-version: "22"
+    secrets:
+      bigcommerce-access-token: ${{ secrets.BIGCOMMERCE_ACCESS_TOKEN }}
+      bigcommerce-client-id: ${{ secrets.BIGCOMMERCE_CLIENT_ID }}
+      bigcommerce-client-secret: ${{ secrets.BIGCOMMERCE_CLIENT_SECRET }}
+```
+
+**Multi-Channel Deployment:**
+```yaml
+jobs:
+  deploy-multi-channel:
+    uses: aligent/workflows/.github/workflows/bigcommerce-theme-deploy.yml@main
+    with:
+      store-hash: "def456ghi7"
+      environment: staging
+      theme-name: "multi-channel-theme"
+      apply-to-all-channels: true
+      delete-oldest: true
+      theme-config: '{"logo": {"url": "https://cdn.example.com/logo.png"}, "colors": {"primary": "#ff6b35"}}'
+      debug: true
+    secrets:
+      bigcommerce-access-token: ${{ secrets.BIGCOMMERCE_ACCESS_TOKEN }}
+      bigcommerce-client-id: ${{ secrets.BIGCOMMERCE_CLIENT_ID }}
+      bigcommerce-client-secret: ${{ secrets.BIGCOMMERCE_CLIENT_SECRET }}
+```
+
+**Specific Channel Deployment:**
+```yaml
+jobs:
+  deploy-specific-channels:
+    uses: aligent/workflows/.github/workflows/bigcommerce-theme-deploy.yml@main
+    with:
+      store-hash: "ghi789jkl0"
+      environment: production
+      theme-name: "channel-specific-theme"
+      channel-ids: "1,2,5"
+      variation-name: "Mobile"
+    secrets:
+      bigcommerce-access-token: ${{ secrets.BIGCOMMERCE_ACCESS_TOKEN }}
+      bigcommerce-client-id: ${{ secrets.BIGCOMMERCE_CLIENT_ID }}
+      bigcommerce-client-secret: ${{ secrets.BIGCOMMERCE_CLIENT_SECRET }}
+```
+
 ### PHP Quality Checks
 
 A comprehensive PHP quality assurance workflow supporting static analysis, coding standards validation, security auditing, and testing with coverage reporting across multiple PHP versions.