chore(rebar): Pier_T_rebar 작업 폴더 초기 구성 및 외부 의존 파일 통합

- Code\rebar_pipeline, review_pipeline, pier-program을 정션에서 실제 폴더로 전환
- Code\rhino_mcp 및 CLAUDE_rhino배경.md 추가, .mcp.json은 PYTHONPATH로 새 위치 사용
- pier-program 내부 .git 제거(이력은 backup\pier-program_20261028.bundle에 보관)
- worktree 가이드 반영(CLAUDE.local.md, HANDOFF.md)
- D:\Rhino-MCP 경로 참조를 새 위치로 치환

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.hmcmkit/knowledge/skills/bkend-cookbook/SKILL.md

@@ -0,0 +1,89 @@
+---
+name: bkend-cookbook
+classification: capability
+classification-reason: Pattern guidance may overlap with model's built-in knowledge as it improves
+deprecation-risk: medium
+description: |
+  bkend.ai project tutorials (todo to SaaS) and common error troubleshooting.
+  Triggers: bkend tutorial, cookbook, troubleshooting, 튜토리얼, 에러 해결.
+user-invocable: false
+agent: hmcmkit:bkend-expert
+allowed-tools:
+  - Read
+  - Write
+  - Edit
+  - Glob
+  - Grep
+  - Bash
+  - mcp__bkend__*
+imports:
+  - ${PLUGIN_ROOT}/templates/shared/bkend-patterns.md
+---
+
+# bkend.ai Cookbook & Troubleshooting
+
+## Single Project Guides
+
+| Project | Level | Key Features |
+|---------|-------|-------------|
+| Todo App | Beginner | Basic CRUD, state management |
+| Note App | Beginner | Rich text, categories |
+| Blog | Intermediate | Posts, tags, file upload |
+| Chat App | Intermediate | Real-time messaging |
+| E-commerce | Intermediate | Products, orders, payments |
+| Booking System | Intermediate | Reservations, calendar |
+| Social Feed | Advanced | Posts, follows, feeds |
+| Dashboard | Advanced | Charts, analytics, roles |
+| Multi-tenant | Advanced | Organization-scoped data |
+| SaaS Starter | Advanced | Subscriptions, billing, onboarding |
+
+## Full Guide Projects (4, each with quick-start + 7 chapters)
+
+| Project | Auth | Core CRUD | Files | Advanced | AI |
+|---------|------|-----------|-------|----------|-----|
+| Blog | Email/Social | Articles, Tags | Images | Bookmarks | AI summary |
+| Recipe App | Email/Social | Recipes, Ingredients | Photos | Meal Plan, Shopping List | AI recommendations |
+| Shopping Mall | Email/Social | Stores, Products, Orders | Product images | Reviews | AI search |
+| Social Network | Email/Social | Profiles, Posts | Media | Follows, Feeds | AI recommendations |
+
+## Common Implementation Pattern
+
+```
+1. Auth setup (email + social login)
+2. Core CRUD (main data tables)
+3. File upload (images/media)
+4. Advanced features (search, filters, relationships)
+5. AI integration (recommendations, summaries)
+6. Troubleshooting & optimization
+```
+
+## Troubleshooting Quick Reference
+
+| Error | Cause | Solution |
+|-------|-------|----------|
+| 401 Unauthorized | Token expired | POST /v1/auth/refresh |
+| 403 Forbidden | Insufficient permissions | Check RBAC settings |
+| 404 Not Found | Wrong path/ID | Verify endpoint and environment |
+| 409 Conflict | Unique field duplicate | Check duplicate data |
+| 429 Rate Limit | Request limit exceeded (100/h) | Check Retry-After header |
+| CORS Error | Domain not registered | Register in bkend console |
+| MCP Connection Failed | OAuth incomplete | Complete browser auth |
+| Schema Validation | BSON type mismatch | Check schema with backend_table_get |
+
+## FAQ
+
+| Question | Answer |
+|----------|--------|
+| Table not visible | Check environment (dev/staging/prod) |
+| MCP tools not showing | Run `ai-agent mcp list` to verify connection |
+| Social login not working | Check Provider settings in console |
+| File upload fails | Verify size limits (image 10MB, video 100MB) |
+| Slow queries | Add indexes via backend_index_manage |
+| Data not syncing | Check x-environment header matches |
+
+## Official Documentation (Live Reference)
+
+For the latest cookbook and troubleshooting, use WebFetch:
+- Cookbooks: https://raw.githubusercontent.com/popup-studio-ai/bkend-docs/main/en/cookbooks/blog/01-quick-start.md
+- Troubleshooting: https://raw.githubusercontent.com/popup-studio-ai/bkend-docs/main/en/troubleshooting/01-common-errors.md
+- Full TOC: https://raw.githubusercontent.com/popup-studio-ai/bkend-docs/main/SUMMARY.md