Write a handoff brief so I can continue this work in a brand new chat. Read our whole conversation. Do not ask me questions. Output ONLY the brief in one code block, under 250 words, in this exact shape:

# Handoff: <goal in one line>

## Where we are
- Done: <what is finished and agreed>
- In progress: <what we were in the middle of>

## Decisions (do not reopen these)
- <decision> because <why>

## Key details to keep
- <names, numbers, links, exact wording, preferences that would otherwise be lost>

## Latest version
<paste the current draft / plan / code only if it is short. If it is long, tell me which message to paste in after this brief.>

## Next step
<the single most immediate thing to do>

## To resume
Read this brief, confirm you understand in one line, then do the next step.

Rules: record decisions and why, not the story of how we got there. One next step, not a plan. Assume the reader knows nothing. Never include passwords or API keys.
