Coding Agent Handoff Note

We're ending this session. Write a handoff note for the next coding session, which will start with no memory of this one. Save it as [file path, e.g. docs/HANDOFF.md], replacing any older note, and keep it under one screen.

Use these sections:
1. Goal: what we're trying to achieve, in one or two sentences.
2. Done: what was changed in this session, with file paths. Only list things that are actually in the code now.
3. Verified: what was tested and how (commands run, results). Anything not run goes under Not verified, not here.
4. Not verified or broken: known failures, flaky tests, guesses you made.
5. Next step: the single next thing to do, specific enough to start without asking.
6. Don't touch: decisions already made, files or approaches that were tried and rejected, and why.
7. Gotchas: commands, environment quirks or traps that cost time in this session.

Then give me a one-line prompt I can paste to start the next session from this note. Don't pad any section; write "none" if it's empty.