Let the agent make one small, reviewable change

The prompt

Enable scoped file edits, local validation, branch creation, and pull-request generation for one bounded change request. Confirm it produces a reviewable PR with deterministic validation evidence attached.

Why it's built that way

Exit criterion: a bounded request produces a reviewable PR with deterministic validation evidence — the first time the agent's output is something a human actually reviews and approves, not just observes.

What to do with the answer

Review this first PR unusually carefully — it's your first real signal for whether the guardrails from phases 1-2 are actually holding under real use.