## Result contract

Use the channel selected by the caller.

For a short message, return only the evidence and decision needed next. For a
file channel, write the detailed result to REPORT and return status, counters,
and `REPORT: <absolute path>`.

When relevant, the detailed result contains:

- `STATUS: complete | questions | blocked`
- `EVIDENCE:` changed files, checks, and observed results
- `DECISIONS:` design or scope questions with options, costs, and a recommendation
- `FINDINGS:` severity, location, claim, and verification method
- `NEXT:` one concrete action or `none`

Omit empty sections and raw tool output. Do not duplicate a file report in the
final message.