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/templates/shared/error-handling-patterns.md

@@ -0,0 +1,149 @@
+# Error Handling Patterns
+
+> Shared error handling patterns for Skills and Agents
+>
+> Usage: Add to frontmatter imports in SKILL.md or Agent.md
+> ```yaml
+> imports:
+>   - ${PLUGIN_ROOT}/templates/shared/error-handling-patterns.md
+> ```
+
+## Standard Error Response Format
+
+```json
+{
+  "success": false,
+  "error": {
+    "code": "ERROR_CODE",
+    "message": "Human readable message",
+    "details": {}
+  }
+}
+```
+
+## Error Code Conventions
+
+| Category | Prefix | Example |
+|----------|--------|---------|
+| Authentication | AUTH_ | AUTH_INVALID_TOKEN |
+| Validation | VALIDATION_ | VALIDATION_REQUIRED_FIELD |
+| Permission | PERMISSION_ | PERMISSION_DENIED |
+| Resource | RESOURCE_ | RESOURCE_NOT_FOUND |
+| Server | SERVER_ | SERVER_INTERNAL_ERROR |
+
+## Error Handling Rules
+
+1. **Always return structured errors** - Never expose raw exceptions
+2. **Use appropriate HTTP status codes**:
+   - 400: Client error (validation, bad request)
+   - 401: Authentication required
+   - 403: Permission denied
+   - 404: Resource not found
+   - 500: Server error
+3. **Log errors with context** - Include request ID, user ID, timestamp
+4. **Sanitize error messages** - Remove sensitive data before response
+
+## Try-Catch Pattern
+
+```javascript
+try {
+  // Operation
+} catch (error) {
+  debugLog('ModuleName', 'Operation failed', {
+    error: error.message,
+    context: { /* relevant data */ }
+  });
+
+  return {
+    success: false,
+    error: {
+      code: categorizeError(error),
+      message: sanitizeErrorMessage(error)
+    }
+  };
+}
+```
+
+## Sentry Integration (Enterprise Level)
+
+### Frontend — Next.js Error Boundary + Sentry
+
+```typescript
+// app/error.tsx (Next.js App Router)
+'use client';
+import * as Sentry from '@sentry/nextjs';
+import { useEffect } from 'react';
+
+export default function Error({ error, reset }: { error: Error; reset: () => void }) {
+  useEffect(() => {
+    Sentry.captureException(error);
+  }, [error]);
+
+  return (
+    <div>
+      <h2>Something went wrong</h2>
+      <button onClick={reset}>Try again</button>
+    </div>
+  );
+}
+```
+
+### Backend — FastAPI Error Middleware + Sentry
+
+```python
+# services/shared/middleware/error_handler.py
+import sentry_sdk
+from fastapi import Request
+from fastapi.responses import JSONResponse
+
+async def error_handler(request: Request, exc: Exception):
+    # Sentry captures automatically via ASGI integration
+    # Add custom context for Self-Healing Agent
+    sentry_sdk.set_context("request", {
+        "url": str(request.url),
+        "method": request.method,
+        "headers": dict(request.headers),
+    })
+    sentry_sdk.set_tag("service", SERVICE_NAME)
+
+    return JSONResponse(
+        status_code=500,
+        content={
+            "success": False,
+            "error": {
+                "code": "SERVER_INTERNAL_ERROR",
+                "message": "An unexpected error occurred",
+                "request_id": request.state.request_id,
+            }
+        }
+    )
+```
+
+### Error Severity → Self-Healing Mapping
+
+| Sentry Level | Self-Healing Action | Auto-Rollback |
+|-------------|---------------------|---------------|
+| Fatal | Immediate escalation (PagerDuty) | Yes |
+| Error (new) | Self-Healing trigger | No (wait for fix) |
+| Error (regression) | Self-Healing + PagerDuty | Yes if spike |
+| Warning | Log only | No |
+| Info | Ignore | No |
+
+### Structured Logging for Sentry Correlation
+
+```python
+# JSON log format — correlates with Sentry events
+import structlog
+
+logger = structlog.get_logger()
+
+logger.error(
+    "payment_failed",
+    user_id=user.id,
+    amount=amount,
+    error=str(exc),
+    trace_id=span.trace_id,        # Links to Tempo trace
+    sentry_event_id=sentry_sdk.last_event_id(),  # Links to Sentry
+    request_id=request.state.request_id,
+)
+```