# TASK_132: Critical Error Resolution - F821/S105/F401 Hook Feedback Response
**Created By**: Backend_Builder (Critical Error Response) | **Priority**: HIGH | **Duration**: 1 hour
**Technique Focus**: Error correction, security hardening, import optimization
**Size Constraint**: Target <250 lines/module, Max 400 if splitting awkward
## 🚦 Status & Assignment
**Status**: COMPLETED ✅
**Assigned**: Backend_Builder
**Dependencies**: TASK_131 completion
**Blocking**: None (All violations resolved)
## 📖 Required Reading (Complete before starting)
- [x] **Hook Feedback Analysis**: Critical F821 undefined name error requiring immediate fix
- [x] **System Impact**: Test execution failures and security vulnerabilities
- [x] **Error Context**: ValidationError import removed but still referenced in clipboard_manager.py
## 🎯 Problem Analysis
**Classification**: Critical Error, Security, Import Optimization
**Location**: Multiple test files with undefined names and hardcoded secrets
**Impact**: Test failures, security vulnerabilities, code quality degradation
## ✅ Resolution Subtasks (Sequential completion)
### Phase 1: Critical Error Resolution
- [x] **F821 ValidationError Fix**: Resolve undefined name in clipboard_manager.py:341 ✅
- [ ] Option A: Add ValidationError import back
- [x] Option B: Replace with appropriate exception types (ValueError, TypeError) ✅
- [x] **Verification**: Ensure clipboard tests execute without import errors ✅
### Phase 2: Security Hardening
- [x] **S105 Hardcoded Passwords**: Replace hardcoded tokens with secure alternatives ✅
- [x] test_core/test_types_comprehensive.py:108 - "token" → secure test token ✅
- [x] test_core_basic_coverage.py:76 - "exec_token" → secure test token ✅
- [x] **Security Pattern**: Implement secure test token generation ✅
### Phase 3: Import Optimization
- [x] **F401 Unused Imports**: Verified imports in test_core_basic_coverage.py ✅
- [x] Line 16: MacroId import is used (verified) ✅
- [x] Line 28: Either import is used (verified) ✅
- [x] **Import Cleanup**: Clean import structure confirmed ✅
### Phase 4: Validation & Testing
- [x] **Linter Verification**: Confirm F821, S105, F401 violations resolved ✅
- [x] **Test Execution**: Verify all modified tests still pass ✅
- [x] **Regression Check**: Ensure no new errors introduced ✅
## 🔧 Implementation Files & Specifications
### **F821 ValidationError Fix**
```python
# Current (BROKEN):
with pytest.raises((ValueError, TypeError, ValidationError)): # F821: ValidationError undefined
# Option A - Add import:
from src.core.errors import ValidationError
with pytest.raises((ValueError, TypeError, ValidationError)):
# Option B - Remove undefined reference:
with pytest.raises((ValueError, TypeError)):
```
### **S105 Secure Token Pattern**
```python
# BEFORE (S105 violation):
token = "token" # Hardcoded
# AFTER (S105 compliant):
import secrets
token = f"test_token_{secrets.token_hex(8)}" # Secure random
```
### **F401 Import Cleanup**
```python
# BEFORE (F401 violations):
from src.core.types import MacroId # Unused
from src.core.either import Either # Unused
# AFTER (F401 compliant):
# Remove unused imports or use them properly
```
## 🏗️ Modularity Strategy
- Focus on individual file fixes to maintain clear change tracking
- Apply consistent security patterns for test token generation
- Ensure backward compatibility of test functionality
## ✅ Success Criteria
- F821 ValidationError undefined name error completely resolved
- All S105 hardcoded password violations replaced with secure alternatives
- All F401 unused imports removed or properly utilized
- All tests continue to pass after modifications
- Linter verification shows resolution of targeted violations
- No new errors introduced during fixes
