Claude GitHub Actions

Create a GitHub Actions workflow that triggers Claude Code when @claude is mentioned in a comment, issue, or pull request. The workflow should run on an ubuntu-latest environment, with read permissions for contents, pull requests, issues, and id-token. It should include steps to checkout the repository and run Claude Code using the anthropics/claude-code-action. Provide a custom prompt to Claude, such as 'Update the pull request description to include a summary of changes.' Include constraints and quality criteria, such as specifying the ANTHROPIC_API_KEY secret and customizing behavior with claude_args.