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PROJECT-CONTORL/openspec/changes/archive/2026-01-10-add-backend-reliability/tasks.md
beabigegg 3bdc6ff1c9 feat: implement 8 OpenSpec proposals for security, reliability, and UX improvements
## Security Enhancements (P0)
- Add input validation with max_length and numeric range constraints
- Implement WebSocket token authentication via first message
- Add path traversal prevention in file storage service

## Permission Enhancements (P0)
- Add project member management for cross-department access
- Implement is_department_manager flag for workload visibility

## Cycle Detection (P0)
- Add DFS-based cycle detection for task dependencies
- Add formula field circular reference detection
- Display user-friendly cycle path visualization

## Concurrency & Reliability (P1)
- Implement optimistic locking with version field (409 Conflict on mismatch)
- Add trigger retry mechanism with exponential backoff (1s, 2s, 4s)
- Implement cascade restore for soft-deleted tasks

## Rate Limiting (P1)
- Add tiered rate limits: standard (60/min), sensitive (20/min), heavy (5/min)
- Apply rate limits to tasks, reports, attachments, and comments

## Frontend Improvements (P1)
- Add responsive sidebar with hamburger menu for mobile
- Improve touch-friendly UI with proper tap target sizes
- Complete i18n translations for all components

## Backend Reliability (P2)
- Configure database connection pool (size=10, overflow=20)
- Add Redis fallback mechanism with message queue
- Add blocker check before task deletion

## API Enhancements (P3)
- Add standardized response wrapper utility
- Add /health/ready and /health/live endpoints
- Implement project templates with status/field copying

## Tests Added
- test_input_validation.py - Schema and path traversal tests
- test_concurrency_reliability.py - Optimistic locking and retry tests
- test_backend_reliability.py - Connection pool and Redis tests
- test_api_enhancements.py - Health check and template tests

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2026-01-10 22:13:43 +08:00

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# Tasks: Add Backend Reliability Improvements
## 1. Database Connection Pool
- [x] 1.1 Add pool_size=10 configuration
- [x] 1.2 Add max_overflow=20 configuration
- [x] 1.3 Add pool_timeout=30 configuration
- [x] 1.4 Add environment variable overrides for pool settings
- [x] 1.5 Log connection pool statistics periodically
## 2. Redis Fallback Mechanism
- [x] 2.1 Create in-memory queue for failed Redis publishes
- [x] 2.2 Implement background retry for queued messages
- [x] 2.3 Add max queue size limit to prevent memory issues
- [x] 2.4 Log Redis failures and recovery events
## 3. Blocker Deletion Check
- [x] 3.1 Add check for unresolved blockers before task deletion
- [x] 3.2 Return warning response with blocker count
- [x] 3.3 Add force_delete parameter to bypass check
- [x] 3.4 Auto-resolve blockers when force deleting
## 4. NAS Storage Validation
- [x] 4.1 Validate UPLOAD_DIR path exists on startup
- [x] 4.2 Check write permissions on storage directory
- [x] 4.3 Log warning if using local storage instead of NAS
- [x] 4.4 Add health check endpoint for storage status
## 5. Testing
- [x] 5.1 Test under connection pool exhaustion
- [x] 5.2 Test Redis disconnect and recovery
- [x] 5.3 Test blocker deletion scenarios