Handoff

Goal: leave the project state recorded so the next session starts from catch-up, not from scratch. The end-of-session counterpart to catch-up.

1. Snapshot what changed — git_context for the modified/uncommitted files and recent commits, so the handoff names the exact files touched this session.
2. Record caveats — annotate any fragile spot, constraint, race, or workaround you discovered or introduced this session, on the file it lives in; get_annotations on the touched files to confirm earlier notes still hold (delete_annotation ones a fix made stale).
3. Record the decision & next step — create_checkpoint (type handoff) with what was done, which files changed, why, and the concrete next action. Keep the summary tight (it has a length cap). If the session was a dead end or a direction change, say so and why.

Finish: a short handoff note — done / in flight / next step / open caveats — each with a file:line or checkpoint reference, so a fresh session can resume without re-deriving context.