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description: Write a commit message from the staged diff and commit.
---

Read the staged diff with `git diff --cached`. Write a commit message:

- First line: imperative, under 60 characters, no trailing period.
- Body: why the change exists, not a restatement of the diff. Wrap at 72.
- No AI tells in the message. No em dashes.

Show me the message, then commit on my confirmation. Never commit secrets or unrelated files.