feat: Add Sequential Thinking to Code Review + Frontend Validation

Enhanced code review and frontend validation with intelligent triggers:

Code Review Agent Enhancement:
- Added Sequential Thinking MCP integration for complex issues
- Triggers on 2+ rejections or 3+ critical issues
- New escalation format with root cause analysis
- Comprehensive solution strategies with trade-off evaluation
- Educational feedback to break rejection cycles
- Files: .claude/agents/code-review.md (+308 lines)
- Docs: CODE_REVIEW_ST_ENHANCEMENT.md, CODE_REVIEW_ST_TESTING.md

Frontend Design Skill Enhancement:
- Automatic invocation for ANY UI change
- Comprehensive validation checklist (200+ checkpoints)
- 8 validation categories (visual, interactive, responsive, a11y, etc.)
- 3 validation levels (quick, standard, comprehensive)
- Integration with code review workflow
- Files: .claude/skills/frontend-design/SKILL.md (+120 lines)
- Docs: UI_VALIDATION_CHECKLIST.md (462 lines), AUTOMATIC_VALIDATION_ENHANCEMENT.md (587 lines)

Settings Optimization:
- Repaired .claude/settings.local.json (fixed m365 pattern)
- Reduced permissions from 49 to 33 (33% reduction)
- Removed duplicates, sorted alphabetically
- Created SETTINGS_PERMISSIONS.md documentation

Checkpoint Command Enhancement:
- Dual checkpoint system (git + database)
- Saves session context to API for cross-machine recall
- Includes git metadata in database context
- Files: .claude/commands/checkpoint.md (+139 lines)

Decision Rationale:
- Sequential Thinking MCP breaks rejection cycles by identifying root causes
- Automatic frontend validation catches UI issues before code review
- Dual checkpoints enable complete project memory across machines
- Settings optimization improves maintainability

Total: 1,200+ lines of documentation and enhancements

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.claude/claude.md

@@ -13,6 +13,7 @@
 - **Context Recall System** with cross-machine persistent memory
 - **JWT Authentication** on all endpoints
 - **AES-256-GCM Encryption** for credentials
+- **3 MCP Servers** configured (GitHub, Filesystem, Sequential Thinking)
 
 ---
 
@@ -30,9 +31,15 @@ D:\ClaudeTools/
 │   └── utils/             # Crypto & compression utilities
 ├── migrations/            # Alembic database migrations
 ├── .claude/              # Claude Code hooks & config
+│   ├── commands/         # Commands (sync, create-spec, checkpoint)
+│   ├── skills/           # Skills (frontend-design)
+│   ├── templates/        # Templates (app spec, prompts)
 │   ├── hooks/            # Auto-inject/save context
 │   └── context-recall-config.env  # Configuration
-└── scripts/              # Setup & test scripts
+├── mcp-servers/          # MCP server implementations
+│   └── feature-management/  # Feature tracking MCP server
+├── scripts/              # Setup & test scripts
+└── projects/             # Project workspaces
 ```
 
 ---
@@ -244,9 +251,11 @@ POST /api/credentials
 ## Important Files
 
 **Session State:** `SESSION_STATE.md` - Complete project history and status
+
 **Documentation:**
 - `.claude/CONTEXT_RECALL_QUICK_START.md` - Context recall usage
 - `CONTEXT_RECALL_SETUP.md` - Full setup guide
+- `AUTOCODER_INTEGRATION.md` - AutoCoder resources guide
 - `TEST_PHASE5_RESULTS.md` - Phase 5 test results
 - `TEST_CONTEXT_RECALL_RESULTS.md` - Context recall test results
 
@@ -261,6 +270,13 @@ POST /api/credentials
 - `test_context_recall_system.py` - Context recall tests (53 total)
 - `test_context_compression_quick.py` - Compression tests (10/10 passing)
 
+**AutoCoder Resources:**
+- `.claude/commands/create-spec.md` - Create app specification
+- `.claude/commands/checkpoint.md` - Create development checkpoint
+- `.claude/skills/frontend-design/` - Frontend design skill
+- `.claude/templates/` - Prompt templates (4 templates)
+- `mcp-servers/feature-management/` - Feature tracking MCP server
+
 ---
 
 ## Recent Work (from SESSION_STATE.md)
@@ -359,6 +375,29 @@ alembic upgrade head
 
 ---
 
+## MCP Servers
+
+**Model Context Protocol servers extend Claude Code's capabilities.**
+
+**Configured Servers:**
+- **GitHub MCP** - Repository and PR management (requires token)
+- **Filesystem MCP** - Enhanced file operations (D:\ClaudeTools access)
+- **Sequential Thinking MCP** - Structured problem-solving
+
+**Configuration:** `.mcp.json` (project-scoped)
+**Documentation:** `MCP_SERVERS.md` - Complete setup and usage guide
+**Setup Script:** `bash scripts/setup-mcp-servers.sh`
+
+**Quick Start:**
+1. Add GitHub token to `.mcp.json` (optional)
+2. Restart Claude Code completely
+3. Test: "Use sequential thinking to analyze X"
+4. Test: "List Python files in the api directory"
+
+**Note:** GitHub MCP is for GitHub.com - Gitea integration requires custom solution (see MCP_SERVERS.md)
+
+---
+
 ## Next Steps (Optional Phase 7)
 
 **Remaining entities (from original spec):**
@@ -390,12 +429,23 @@ alembic upgrade head
 **Start API:** `uvicorn api.main:app --reload`
 **API Docs:** `http://localhost:8000/api/docs` (local) or `http://172.16.3.30:8001/api/docs` (RMM)
 **Setup Context Recall:** `bash scripts/setup-context-recall.sh`
+**Setup MCP Servers:** `bash scripts/setup-mcp-servers.sh`
 **Test System:** `bash scripts/test-context-recall.sh`
 **Database:** `172.16.3.30:3306/claudetools` (RMM Server)
 **Virtual Env:** `api\venv\Scripts\activate`
 **Coding Guidelines:** `.claude/CODING_GUIDELINES.md`
+**MCP Documentation:** `MCP_SERVERS.md`
+**AutoCoder Integration:** `AUTOCODER_INTEGRATION.md`
+
+**Available Commands:**
+- `/sync` - Cross-machine context synchronization
+- `/create-spec` - Create app specification
+- `/checkpoint` - Create development checkpoint
+
+**Available Skills:**
+- `/frontend-design` - Modern frontend design patterns
 
 ---
 
-**Last Updated:** 2026-01-17 (Database migrated to RMM server)
+**Last Updated:** 2026-01-17 (AutoCoder resources integrated)
 **Project Progress:** 95% Complete (Phase 6 of 7 done)