diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 8d77857..256e138 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -50,6 +50,47 @@ jobs:
         VERSION="${{ steps.version.outputs.version }}"
         sed -i "s/^__version__ = \".*\"/__version__ = \"$VERSION\"/" sentience/__init__.py
 
+    - name: Verify extension files are present
+      run: |
+        echo "🔍 Verifying extension files are included..."
+        
+        # Check required extension files exist
+        REQUIRED_FILES=(
+          "sentience/extension/manifest.json"
+          "sentience/extension/content.js"
+          "sentience/extension/background.js"
+          "sentience/extension/injected_api.js"
+          "sentience/extension/pkg/sentience_core.js"
+          "sentience/extension/pkg/sentience_core_bg.wasm"
+        )
+        
+        MISSING_FILES=()
+        for file in "${REQUIRED_FILES[@]}"; do
+          if [ ! -f "$file" ]; then
+            MISSING_FILES+=("$file")
+          fi
+        done
+        
+        if [ ${#MISSING_FILES[@]} -ne 0 ]; then
+          echo "❌ Error: Missing required extension files:"
+          printf '  - %s\n' "${MISSING_FILES[@]}"
+          echo ""
+          echo "Please ensure the extension is synced before releasing."
+          echo "Run the sync-extension workflow or manually sync extension files."
+          exit 1
+        fi
+        
+        # Verify findTextRect function exists in injected_api.js
+        if ! grep -q "findTextRect:" sentience/extension/injected_api.js; then
+          echo "❌ Error: findTextRect function not found in injected_api.js"
+          echo "The extension may be out of date. Please sync the extension before releasing."
+          exit 1
+        fi
+        
+        echo "✅ All extension files verified"
+        echo "📦 Extension files that will be included:"
+        find sentience/extension -type f | sort
+
     - name: Build package
       run: |
         python -m build
@@ -57,6 +98,59 @@ jobs:
     - name: Check package
       run: |
         twine check dist/*
+    
+    - name: Verify extension files in built package
+      run: |
+        echo "🔍 Verifying extension files are included in the built package..."
+        
+        # Extract wheel to check contents
+        WHEEL_FILE=$(ls dist/*.whl | head -1)
+        WHEEL_PATH=$(realpath "$WHEEL_FILE")
+        echo "Checking wheel: $WHEEL_PATH"
+        
+        # Create temp directory for extraction
+        TEMP_DIR=$(mktemp -d)
+        cd "$TEMP_DIR"
+        
+        # Extract wheel (it's a zip file)
+        unzip -q "$WHEEL_PATH"
+        
+        # Check for required extension files in the wheel
+        REQUIRED_IN_WHEEL=(
+          "sentience/extension/manifest.json"
+          "sentience/extension/injected_api.js"
+          "sentience/extension/pkg/sentience_core.js"
+          "sentience/extension/pkg/sentience_core_bg.wasm"
+        )
+        
+        MISSING_IN_WHEEL=()
+        for file in "${REQUIRED_IN_WHEEL[@]}"; do
+          if [ ! -f "$file" ]; then
+            MISSING_IN_WHEEL+=("$file")
+          fi
+        done
+        
+        if [ ${#MISSING_IN_WHEEL[@]} -ne 0 ]; then
+          echo "❌ Error: Extension files missing from built wheel:"
+          printf '  - %s\n' "${MISSING_IN_WHEEL[@]}"
+          echo ""
+          echo "This indicates a packaging configuration issue."
+          echo "Check MANIFEST.in and pyproject.toml package-data settings."
+          exit 1
+        fi
+        
+        # Verify findTextRect is in the packaged injected_api.js
+        if ! grep -q "findTextRect:" sentience/extension/injected_api.js; then
+          echo "❌ Error: findTextRect not found in packaged injected_api.js"
+          exit 1
+        fi
+        
+        echo "✅ All extension files verified in built package"
+        echo "📦 Extension files found in wheel:"
+        find sentience/extension -type f | sort
+        
+        # Cleanup
+        rm -rf "$TEMP_DIR"
 
     - name: Publish to PyPI
       env:
diff --git a/pyproject.toml b/pyproject.toml
index 9daef5e..9eb796f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "sentienceapi"
-version = "0.90.8"
+version = "0.90.9"
 description = "Python SDK for Sentience AI Agent Browser Automation"
 readme = "README.md"
 requires-python = ">=3.11"
diff --git a/sentience/__init__.py b/sentience/__init__.py
index 7f849a2..3274adf 100644
--- a/sentience/__init__.py
+++ b/sentience/__init__.py
@@ -70,7 +70,7 @@
 )
 from .wait import wait_for
 
-__version__ = "0.90.8"
+__version__ = "0.90.9"
 
 __all__ = [
     # Core SDK