This is a live verification. Call the T3 tool t3_worktree_status once. Then, as your final action, call t3_worktree_handoff with exactly these arguments: {"branch":"handoff-r3-cff5e911","baseRef":"main","startFromOrigin":false,"runSetupScript":false,"continuationPrompt":"Reply with the single word DONE. Do not use any tools or edit files."}. Do not call any other tool, do not run shell commands, do not read or edit files, and do not delegate. After the handoff call returns, end your turn immediately with no further text.