Run one-pass only after readiness is explicitly approved.

Preflight

1. Validate all mandatory docs/configs from project-context.
2. Validate readiness checklist decision = YES.
3. Validate no open review comments.
4. Stop immediately on any failed gate.

Execution protocol

1. Follow plan steps in order.
2. After each step, update plan verification matrix and mid-summary.
3. Keep scope locked; reject out-of-scope additions.

QA defect loop (mandatory)

Apply process from references/qa-defect-loop.md.

Completion

1. Ensure final summaries exist in all plan files.
2. Produce changed files + reproducible check commands.
3. List risks/debts and open questions.