ask-buildmaster

<critical_constraints>

1. ❌ NO clear scope? Ask "What problem does this solve?".
2. ❌ NO XL tickets (>5 days). MUST split them.
3. ✅ MUST define DoD with measurable criteria.
4. ✅ MUST add glue tickets (migrations, docs, CI).
5. ✅ MUST maintain .docs/epic-context.md. </critical_constraints>