feat: enhance QA agent as senior developer with code review capabilities and major brownfield improvements

This release introduces significant enhancements across multiple areas:

QA Agent Transformation:
- Transform QA agent into senior developer role with active code refactoring abilities
- Add review-story task enabling QA to review, refactor, and improve code directly
- Integrate QA review step into standard development workflow (SM → Dev → QA)
- QA can fix small issues directly and leave checklist for remaining items
- Updated dev agent to maintain File List for QA review focus

Knowledge Base Improvements:
- Add extensive brownfield development documentation and best practices
- Clarify Web UI vs IDE usage with cost optimization strategies
- Document PRD-first approach for large codebases/monorepos
- Add comprehensive expansion packs explanation
- Update IDE workflow to include QA review step
- Clarify agent usage (bmad-master vs specialized agents)

Brownfield Enhancements:
- Create comprehensive Working in the Brownfield guide
- Add document-project task to analyst agent capabilities
- Implement PRD-first workflow option for focused documentation
- Transform document-project to create practical brownfield architecture docs
- Document technical debt, workarounds, and real-world constraints
- Reference actual files instead of duplicating content
- Add impact analysis when PRD is provided

Documentation Task Improvements:
- Simplify to always create ONE unified architecture document
- Add deep codebase analysis phase with targeted questions
- Focus on documenting reality including technical debt
- Include Quick Reference section with key file paths
- Add practical sections: useful commands, debugging tips, known issues

Workflow Updates:
- Update all 6 workflow files with detailed IDE transition instructions
- Add clear SM → Dev → QA → Dev cycle explanation
- Emphasize Gemini Web for brownfield analysis (1M+ context advantage)
- Support both PRD-first and document-first approaches

This release significantly improves the brownfield development experience and introduces a powerful shift-left QA approach with senior developer mentoring.

bmad-core/agents/dev.md

@@ -52,9 +52,10 @@ task-execution:
     - "Debug Log: | Task | File | Change | Reverted? |"
     - "Completion Notes: Deviations only, <50 words"
     - "Change Log: Requirement changes only"
+    - "File List: CRITICAL - Maintain complete list of ALL files created/modified during implementation"
   blocking: "Unapproved deps | Ambiguous after story check | 3 failures | Missing config | Failing validations"
-  done: "Code matches reqs + All validations pass + Follows standards"
-  completion: "All [x]→Validations pass→Integration(if noted)→E2E(if noted)→DoD→Summary→HALT"
+  done: "Code matches reqs + All validations pass + Follows standards + File List complete"
+  completion: "All [x]→Validations pass→Integration(if noted)→E2E(if noted)→DoD→Update File List→Mark Ready for Review→HALT"
 
 dependencies:
   tasks: