ClaudeKit Blender MCP

# Implementation Plan Summary ## ClaudeKit Blender MCP - 33 Bug Exhaustive Fix Plan **Created:** 2025-11-30 **Status:** Ready for Implementation **Total Bugs:** 33 (Critical: 4, High: 9, Medium: 12, Low: 8) **Duration:** 5-7 days **Files Modified:** 13 --- ## Quick Reference ### Plan Documents 1. **[plan.md](./plan.md)** - Master overview and phase structure 2. **[phase-01-critical-security.md](./phase-01-critical-security.md)** - Path traversal & buffer overflow (2 bugs) 3. **[phase-02-critical-stability.md](./phase-02-critical-stability.md)** - Health check & connection pool race (2 bugs) 4. **[phase-03-high-priority.md](./phase-03-high-priority.md)** - Runtime, memory, type safety, security (9 bugs) 5. **[phase-04-medium-priority.md](./phase-04-medium-priority.md)** - Resource leaks, validation, edge cases (12 bugs) 6. **[phase-05-low-cleanup.md](./phase-05-low-cleanup.md)** - Code quality & minor issues (8 bugs) ### Research Reports - **[researcher-01-runtime-types-memory.md](./research/researcher-01-runtime-types-memory.md)** - 18 bugs identified - **[researcher-02-security-validation.md](./research/researcher-02-security-validation.md)** - 15 bugs identified --- ## Critical Path (Day 1 - MUST FIX FIRST) ### Phase 1: Security Vulnerabilities (4 hours) **BUG-001:** Path Traversal - CRITICAL SECURITY RISK - Allows arbitrary file system access - Fix: Comprehensive path normalization and validation - File: `src/utils/validators.ts` **BUG-003:** Buffer Overflow DoS - CRITICAL SECURITY RISK - Unbounded memory accumulation - Fix: 50MB buffer limit + chunk counter - File: `src/utils/socket-client.ts` ### Phase 2: Stability Crashes (4 hours) **RUNTIME_001:** Health Check Crash - CRITICAL PRODUCTION FAILURE - Unhandled promise rejection crashes server - Fix: try-catch wrapper + shutdown cleanup - File: `src/index.ts` **RACE_CONDITION_001:** Connection Pool Race - CRITICAL DATA CORRUPTION - Concurrent socket access corrupts messages - Fix: Mutex-based atomic acquire/release - File: `src/utils/connection-pool.ts` --- ## Bug Breakdown by Severity ### Critical (4) - IMMEDIATE ACTION REQUIRED 1. **RUNTIME_001** - Health check crashes server 2. **RACE_CONDITION_001** - Connection pool race corruption 3. **BUG-001** - Path traversal vulnerability 4. **BUG-003** - Buffer overflow DoS **Impact:** Production crashes, security breaches, data corruption **Timeline:** Day 1 (8 hours) --- ### High (9) - URGENT FIX REQUIRED 1. **RUNTIME_002** - Socket error handler race 2. **MEMORY_LEAK_001** - Event listener accumulation 3. **RACE_CONDITION_002** - Pending queue race (covered by Phase 2 mutex) 4. **TYPE_SAFETY_001** - Unchecked type cast 5. **UNHANDLED_PROMISE_001** - gracefulShutdown not awaited 6. **BUG-002** - Cache key collision 7. **BUG-004** - Rate limit integer overflow 8. **BUG-005** - Regex ReDoS 9. **BUG-007** - Config validation bypass **Impact:** Memory leaks, security vulnerabilities, type errors, eventual failure **Timeline:** Day 2-4 (16 hours) --- ### Medium (12) - FIX SOON 1. **MEMORY_LEAK_002** - Pool health check timer leak 2. **MEMORY_LEAK_003** - Rate limiter interval leak 3. **ASYNC_RACE_003** - Health check connection leak 4. **TYPE_SAFETY_002** - Missing null check 5. **FILE_UTILS_RACE_001** - Stream error handling 6. **ASYNC_CLEANUP_001** - Socket leak on exception 7. **INDEX_MISSING_SHUTDOWN** - Health interval not cleared 8. **BUG-006** - Cache TTL overflow 9. **BUG-008** - Search query injection 10. **BUG-009** - Socket timeout not reset 11. **BUG-010** - Rate limiter cleanup race 12. **BUG-012** - Dangerous pattern evasion 13. **EDGE-002** - vector3Schema NaN/Infinity 14. **EDGE-003** - colorSchema NaN **Impact:** Resource leaks, validation gaps, degraded performance **Timeline:** Day 4-6 (16 hours) --- ### Low (8) - CLEANUP & QUALITY 1. **MEMORY_LEAK_004** - Array growth inefficiency 2. **RACE_CONDITION_004** - Metrics timing race 3. **TYPE_SAFETY_003** - Unsafe enum indexing 4. **CONFIG_VALIDATION_001** - Boolean parsing ambiguity 5. **LOGGER_REDUNDANCY** - Console method redundancy 6. **BUG-011** - Hidden files allowed 7. **BUG-013** - Tags validation silent drop 8. **BUG-014** - Base64 validation insufficient 9. **BUG-015** - Cache hit counter overflow **Impact:** Minor inefficiencies, code quality issues **Timeline:** Day 6-7 (8 hours) --- ## Files Modified (13 total) ### Core Infrastructure (6 files) 1. **src/index.ts** - Health check interval, shutdown 2. **src/utils/connection-pool.ts** - Race condition fixes, mutex, cleanup 3. **src/utils/socket-client.ts** - Buffer overflow, event listeners, error handling 4. **src/utils/health.ts** - Connection cleanup, graceful shutdown 5. **src/utils/rate-limiter.ts** - Integer overflow, cleanup race, shutdown 6. **src/utils/cache.ts** - Key collision, TTL overflow, hit counter ### Validation & Security (3 files) 7. **src/utils/validators.ts** - Path traversal, NaN/Infinity, hidden files, base64 8. **src/utils/config.ts** - Validation bypass, boolean parsing 9. **src/tools/scripting.ts** - ReDoS, pattern evasion ### Supporting Infrastructure (4 files) 10. **src/utils/metrics.ts** - Array growth, timing race 11. **src/utils/error-middleware.ts** - Enum indexing 12. **src/utils/logger.ts** - Console method redundancy 13. **src/utils/file-utils.ts** - Stream error handling --- ## Implementation Timeline ### Week 1 ``` Mon (Day 1): Phase 1 + 2 (Critical fixes) AM: BUG-001 Path traversal + BUG-003 Buffer overflow PM: RUNTIME_001 Health check + RACE_CONDITION_001 Pool race Tue (Day 2): Phase 3 Start (High priority - Part 1) AM: RUNTIME_002 Socket errors + MEMORY_LEAK_001 Event listeners PM: TYPE_SAFETY_001 Type guards + UNHANDLED_PROMISE_001 Shutdown Wed (Day 3): Phase 3 Continue (High priority - Part 2) AM: BUG-002 Cache collision + BUG-004 Rate limit overflow PM: BUG-005 ReDoS + BUG-007 Config validation Thu (Day 4): Phase 4 Start (Medium priority - Part 1) AM: Memory leaks (MEMORY_LEAK_002, 003, ASYNC_RACE_003) PM: Cleanup issues (ASYNC_CLEANUP_001, INDEX_MISSING_SHUTDOWN) Fri (Day 5): Phase 4 Continue (Medium priority - Part 2) AM: Validation (BUG-006, 008, 009, EDGE-002, 003) PM: Race & Security (BUG-010, 012, TYPE_SAFETY_002) Mon (Day 6): Phase 5 (Low priority) AM: Code quality fixes (5 bugs) PM: Testing and validation Tue (Day 7): Final Testing & Deployment AM: Full test suite, regression testing PM: Code review, deployment preparation ``` --- ## Testing Strategy ### Unit Testing (Per Phase) - Each bug fix has dedicated unit tests - Edge cases explicitly tested - Coverage target: 90%+ for modified code ### Integration Testing - Full test suite after each phase - Connection pool load testing - Memory leak detection (24-hour runs) - Race condition stress testing ### Security Testing - Path traversal penetration testing - Buffer overflow attack simulations - Regex ReDoS pathological inputs - Rate limiting bypass attempts ### Performance Testing - Response time benchmarking - Memory profiling - CPU utilization monitoring - Throughput testing (1000 concurrent requests) --- ## Risk Mitigation ### High-Risk Changes 1. **Connection Pool Mutex** (RACE_CONDITION_001) - Risk: Performance overhead, potential deadlock - Mitigation: Extensive load testing, timeout guards - Rollback: Feature flag for old implementation 2. **Path Validation** (BUG-001) - Risk: False positives breaking valid paths - Mitigation: Comprehensive test suite with real-world paths - Rollback: Relaxed validation with warnings 3. **Buffer Limits** (BUG-003) - Risk: Legitimate large responses rejected - Mitigation: Monitor production response sizes - Rollback: Configurable MAX_BUFFER_SIZE ### Deployment Strategy 1. **Phase 1-2:** Deploy to staging → 24hr soak → canary 5% → 100% 2. **Phase 3-4:** Deploy to staging → load test → canary 10% → 100% 3. **Phase 5:** Deploy to staging → quick validation → 100% ### Rollback Plan - Git branches per phase - Feature flags for critical changes - Automated rollback < 5 minutes - Monitoring alerts for anomalies --- ## Success Metrics ### Code Quality - [ ] 0 TypeScript errors - [ ] 0 ESLint warnings - [ ] 95%+ test coverage - [ ] All 33 bugs verified fixed ### Performance - [ ] Response time maintained (< 5% increase) - [ ] No memory leaks (24-hour stable) - [ ] CPU usage < 50% under load - [ ] Error rate < 0.1% ### Security - [ ] 0 critical vulnerabilities - [ ] 0 high vulnerabilities - [ ] Penetration tests passed - [ ] Security review approved ### Stability - [ ] 0 production crashes - [ ] 0 race conditions detected - [ ] Graceful shutdown works - [ ] Resource cleanup verified --- ## Post-Implementation ### Documentation Updates - [ ] CHANGELOG.md - All 33 fixes documented - [ ] README.md - Updated validation rules - [ ] SECURITY.md - Security improvements - [ ] API.md - New validation behaviors - [ ] TROUBLESHOOTING.md - Common errors ### Monitoring Setup - [ ] Dashboards for new metrics - [ ] Alerts for security events - [ ] Performance baselines updated - [ ] Error tracking enhanced ### Team Communication - [ ] Implementation summary - [ ] Breaking changes (if any) - [ ] Migration guide (if needed) - [ ] Lessons learned --- ## Quick Start Guide ### For Implementers 1. Read [plan.md](./plan.md) for overview 2. Start with Phase 1 (critical security) 3. Run tests after each bug fix 4. Create PR per phase for review 5. Update TODO list as you progress ### For Reviewers 1. Check phase documents for context 2. Verify test coverage for each fix 3. Review security-critical changes carefully 4. Validate performance benchmarks 5. Approve phase-by-phase ### For Testers 1. Follow test plans in each phase document 2. Run security penetration tests (Phase 1) 3. Run load tests (Phase 2-3) 4. Run memory leak tests (Phase 4) 5. Run regression suite (Phase 5) --- ## Resources ### Documentation - Research reports in `./research/` - Phase plans in this directory - Test plans in phase documents - Runbooks in `./docs/` ### Tools Needed - Jest (unit testing) - Artillery (load testing) - Valgrind/heapdump (memory profiling) - OWASP ZAP (security testing) ### Team Contacts - **Security Review:** Security Team Lead - **Code Review:** Engineering Lead - **Testing:** QA Engineer - **Deployment:** DevOps Team --- ## Approval Checklist ### Before Implementation - [ ] Plan reviewed by Engineering Lead - [ ] Security review for Phase 1-3 - [ ] Resource allocation confirmed - [ ] Timeline approved ### Before Deployment - [ ] All phases completed - [ ] Tests passing (95%+ coverage) - [ ] Security scan clean - [ ] Performance benchmarks acceptable - [ ] Documentation updated - [ ] Rollback plan tested --- ## Notes **Key Principles:** - YAGNI, KISS, DRY maintained throughout - No breaking API changes - Backward compatibility preserved - Performance maintained or improved - Security hardened significantly **Dependencies:** - All fixes use built-in Node.js APIs - No new external dependencies - Existing test framework sufficient **Timeline Flexibility:** - Critical fixes (Phase 1-2) non-negotiable on Day 1 - High/Medium fixes can extend to Day 8 if needed - Low fixes can be deferred if timeline tight --- **Plan Author:** Implementation Planner **Review Status:** Pending Approval **Last Updated:** 2025-11-30 --- ## Next Actions 1. **Management:** Review and approve plan 2. **Security Team:** Review Phase 1 fixes 3. **Engineering Lead:** Assign implementers 4. **QA Team:** Prepare test environments 5. **DevOps:** Set up monitoring dashboards **Start Date:** TBD **Target Completion:** Start Date + 7 days