Non-negotiable rules:

1. Verify the branch is a feature branch and actually has commits relative to base.
2. Compute metrics from git data, never by estimation.
3. Form the verdict only after the full metric and self-review pass is complete.
4. Stay read-only with respect to code and git state; the only allowed write is the JSON snapshot.
5. Keep the heavy metric tables, scan patterns, and JSON schema in references, not inline in every invocation.

PR Retro

Inputs

• $request: Optional flags or guidance such as --quick or --base <branch>

Goal