Plans the approach to fix bugs, considering multiple solutions, trade-offs, and implementation strategy.
Plans multiple fix options for bugs, evaluating trade-offs, risks, and implementation strategies. Use when you need to choose between different approaches before coding.
/plugin marketplace add avovello/cc-plugins/plugin install bugfix@cc-pluginsPlans the approach to fix bugs, considering multiple solutions, trade-offs, and implementation strategy.
✅ DOES:
❌ DOES NOT:
Gather Information:
Option 1: Quick Fix (Minimal)
### Option A: Increase Limit to 50MB
**What**: Change multer fileSize limit from 5MB to 50MB
**Changes**:
- src/middleware/upload.js: Update limits.fileSize
- config/upload.js: Update maxFileSize
- .env.example: Document new limit
**Pros**:
- Simple, low-risk
- Quick to implement (15 min)
- Matches nginx limit
- No breaking changes
**Cons**:
- Still has a limit
- May need future increase
- No per-file-type limits
**Risk**: Low
**Effort**: 15 minutes
**Recommended**: ✅ Yes (for immediate fix)
Option 2: Configurable Solution
### Option B: Environment-Based Configuration
**What**: Make limit configurable via environment variable
**Changes**:
- src/middleware/upload.js: Read from env
- config/upload.js: Add MAX_UPLOAD_SIZE
- .env.example: Document variable
- docs/: Update documentation
**Pros**:
- Flexible across environments
- Can adjust without code changes
- Production can have different limit
**Cons**:
- Slightly more complex
- Requires deployment to change
**Risk**: Low
**Effort**: 30 minutes
**Recommended**: ✅ Yes (better long-term)
Option 3: Comprehensive Solution
### Option C: Per-File-Type Limits
**What**: Different limits for different file types
**Changes**:
- src/middleware/upload.js: Custom filter logic
- config/upload.js: Limit map by mime type
- src/controllers/UploadController.js: Validation
- tests/: Additional test cases
**Example**:
```javascript
limits: {
'image/*': 10 * 1024 * 1024, // 10MB for images
'application/pdf': 50 * 1024 * 1024, // 50MB for PDFs
'default': 20 * 1024 * 1024 // 20MB default
}
Pros:
Cons:
Risk: Medium Effort: 2 hours Recommended: ⚠️ Consider for v2
### 3. Evaluate Trade-offs
| Aspect | Option A (50MB) | Option B (Env Var) | Option C (Per-Type) |
|--------|-----------------|-------------------|---------------------|
| Simplicity | ✅ Simple | ✅ Simple | ❌ Complex |
| Flexibility | ❌ Fixed | ✅ Configurable | ✅✅ Very flexible |
| Risk | ✅ Low | ✅ Low | ⚠️ Medium |
| Time | ✅ 15 min | ✅ 30 min | ❌ 2 hours |
| Maintenance | ✅ Easy | ✅ Easy | ❌ Harder |
| Future-proof | ❌ May need change | ✅ Flexible | ✅✅ Very flexible |
### 4. Recommend Approach
```markdown
## Recommended Solution: Option B (Environment-Based)
### Rationale
- Balances simplicity with flexibility
- Low risk, quick implementation
- Allows per-environment customization
- Easy to adjust without code changes
- Minimal testing overhead
### Implementation Plan
**Phase 1: Immediate Fix (Day 1)**
1. Update multer configuration
2. Add environment variable
3. Test with 6MB, 50MB files
4. Deploy to production
**Phase 2: Documentation (Day 1-2)**
1. Update API documentation
2. Update .env.example
3. Add configuration guide
**Phase 3: Monitoring (Day 2-7)**
1. Monitor upload sizes
2. Track success rates
3. Watch for new issues
### Rollback Plan
If issues occur:
1. Revert to 5MB limit
2. Takes 5 minutes
3. No data loss risk
## Implementation Checklist
### Code Changes
**1. Update Upload Middleware** (src/middleware/upload.js)
```javascript
// Before
limits: {
fileSize: 5 * 1024 * 1024
}
// After
limits: {
fileSize: process.env.MAX_UPLOAD_SIZE || 50 * 1024 * 1024
}
2. Update Config (config/upload.js)
maxFileSize: parseInt(process.env.MAX_UPLOAD_SIZE) || 50 * 1024 * 1024
3. Update Environment (.env.example)
# Maximum upload file size (bytes)
# Default: 50MB (52428800 bytes)
MAX_UPLOAD_SIZE=52428800
1. Unit Tests (tests/unit/middleware/upload.test.js)
2. Integration Tests (tests/integration/file-upload.test.js)
3. Manual Testing
### 6. Identify Risks
```markdown
## Risk Assessment
### Risk 1: Increased Storage Usage
- **Likelihood**: High
- **Impact**: Medium
- **Mitigation**: Monitor disk usage, add alerts
### Risk 2: Memory Consumption
- **Likelihood**: Low
- **Impact**: Medium
- **Mitigation**: Multer streams to disk, not memory
### Risk 3: Upload Timeouts
- **Likelihood**: Medium (for 50MB on slow connections)
- **Impact**: Low
- **Mitigation**: Already have 30s timeout, should be sufficient
### Risk 4: Abuse (Large File Spam)
- **Likelihood**: Low
- **Impact**: Medium
- **Mitigation**:
- Rate limiting already in place
- Monitor unusual activity
- Can revert if abused
# Fix Plan
## Bug: File Upload Limit at 5MB
## Recommended Solution
**Option B: Environment-Based Configuration**
### Summary
Make upload size limit configurable via MAX_UPLOAD_SIZE environment
variable, defaulting to 50MB. This provides flexibility while keeping
implementation simple.
## Implementation Plan
### Changes Required
1. src/middleware/upload.js - Use env var
2. config/upload.js - Add config
3. .env.example - Document
4. tests/ - Update tests
### Effort Estimate
- Implementation: 30 minutes
- Testing: 30 minutes
- Documentation: 15 minutes
- Total: 75 minutes
### Risk Level: LOW
## Alternative Options Considered
| Option | Pros | Cons | Recommended |
|--------|------|------|-------------|
| A: Fixed 50MB | Fast | Not flexible | ❌ |
| **B: Env Var** | **Flexible, simple** | **None** | **✅** |
| C: Per-Type | Very flexible | Complex | ❌ (future) |
## Success Criteria
- ✅ Files up to 50MB upload successfully
- ✅ No performance degradation
- ✅ All tests pass
- ✅ Documentation updated
## Rollback Plan
Revert environment variable to 5242880 (5MB). Takes 5 minutes.
## Next Steps
1. ✅ Plan approved
2. Proceed to implementation (fix-implementer)
3. Run tests (fix-tester)
4. Deploy to production
Designs feature architectures by analyzing existing codebase patterns and conventions, then providing comprehensive implementation blueprints with specific files to create/modify, component designs, data flows, and build sequences