- Add "Review complete" terminal signal to headless output template
- Add cross-platform question tool names to headless rules
- Add CE agent sections to headless envelope (Learnings, Agent-Native,
Schema Drift, Deployment Notes)
- Generalize conflicting mode flags error for all mode combinations
- Add contract test assertions for no-commit/push/PR and single-pass
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>