- Add decision log module for context preservation across phases
- Add regression gate module for test baseline tracking
- Add design phase module for pre-implementation planning
- Enhance fix phase to include real tooling output
- Pass design and decision context to dev phase
- Add --skip-design and --skip-regression CLI flags
- Modularize into epic-execute-lib/ for maintainability
Implements improvements from bmad_improvements_v2.md:
- Phase 2.1: Real test output in fix loops
- Phase 2.2: Cumulative decision log
- Phase 2.3: Regression test gate
- Phase 3.1: Pre-implementation design phase
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>