diff --git a/.github/actions/setup-runner/action.yml b/.github/actions/setup-runner/action.yml
index e6a7f064c..18de15bd2 100644
--- a/.github/actions/setup-runner/action.yml
+++ b/.github/actions/setup-runner/action.yml
@@ -28,6 +28,7 @@ runs:
       shell: bash
       env:
         UV_EXTRA_INDEX_URL: ${{ steps.client-config.outputs.uv-extra-index-url }}
+        PYTHONDONTWRITEBYTECODE: 1
       run: |
         # Export UV env vars for current step and persist to GITHUB_ENV for subsequent steps
         if [ -n "$UV_EXTRA_INDEX_URL" ]; then
@@ -43,11 +44,11 @@ runs:
           echo "Removing cached .venv directory"
           rm -rf .venv
         fi
-        
+
         # Clear Python bytecode cache
         find . -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null || true
         find . -name "*.pyc" -delete 2>/dev/null || true
-        
+
         # Clear uv's cache directory to force rebuilding wheels from source
         if [ -n "$UV_CACHE_DIR" ] && [ -d "$UV_CACHE_DIR" ]; then
           echo "Clearing UV cache at $UV_CACHE_DIR"
@@ -69,5 +70,9 @@ runs:
           uv pip install ${{ steps.client-config.outputs.install-source }}
         fi
 
+        echo "Final cleanup: removing all bytecode cache after installations"
+        find . -name "*.pyc" -type f -delete 2>/dev/null || true
+        find . -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null || true
+
         echo "Installed llama packages"
         uv pip list | grep llama