- Add 'sisyphus: working' label when Sisyphus starts working on an issue/PR - Remove label when work completes (success or failure) - Label operations use gh CLI with idempotent commands - Handles both issues and PRs with proper conditional logic - Uses || true for error handling to prevent workflow failures Closes #202 Co-authored-by: sisyphus-dev-ai <sisyphus-dev-ai@users.noreply.github.com>