handoff

Pass my task to a teammate so the work continues without a meeting.

Input: $ARGUMENTS

Steps:

1. The first word is the task key, the second the teammate (agent or agent/session); the rest, if any, is what is left to do. Check the teammate exists with list_agents (and the session with list_sessions when given); if not, ask me instead of guessing.
2. Call get_task and confirm I hold it. If I do not, say who does and stop.
3. Write the state down first: call set_note with scope = handoff and key = the task key exactly as it is (a task key keeps its case and may be longer than a note scope allows, so it goes in the note key, never the scope), and a value with three parts: what is done (from this session), what is left (from the input, or ask me), and where things are (branch, PR, files). Show me the value before writing it if anything in it is a guess. If the write fails, stop here and tell me: nothing is released without its state written down.
4. Then release: release_task with the key.
5. Then point: post_message with to = the teammate and a body that names the task key, says I released it, and tells them to read the note (get_note with scope handoff and key <task key>) and claim it.

Confirm with the note reference, the release, and the message id. Order matters: note, release, message, so the pointer never arrives before the state.