1.1.0

🚀 Major Enhancements

Enhanced Mutable Objects Detection

• Expanded EO008: Complete rewrite from single checker to comprehensive modular package
• 12 New Error Codes: Added EO015-EO027 for granular mutability detection
  • EO015: Mutable class attribute violations
  • EO016: Mutable instance attribute violations
  • EO017: Instance attribute mutation violations
  • EO018: Augmented assignment mutation violations
  • EO019: Mutating method call violations
  • EO020: Subscript assignment mutation violations
  • EO021: Chained mutation violations
  • EO022: Missing factory methods violations
  • EO023: Mutable default argument violations
  • EO024: Missing immutability enforcement violations
  • EO025: Copy-on-write violations
  • EO026: Aliasing violations (exposing mutable state)
  • EO027: Defensive copy violations

Modular Architecture

• 6 Specialized Checkers: Organized mutable objects detection into focused modules
  • core.py: Main orchestrator coordinating all sub-checkers
  • contract_checker.py: Immutability contract enforcement
  • copy_on_write_checker.py: Copy-on-write pattern validation
  • deep_checker.py: Cross-class mutation analysis
  • factory_checker.py: Factory method pattern validation
  • pattern_detectors.py: Aliasing and defensive copy detection
  • shared_state_checker.py: Shared mutable state detection

🔧 Code Quality & Complexity Rules

Ruff Integration

• McCabe Complexity: Added C90 with max-complexity = 10
• Nested Blocks: Added PLR1702 with max-nested-blocks = 5
• Set Literals: Added PLR6201 enforcement (tuple → set membership tests)
• Preview Mode: Enabled ruff preview for latest pylint rules

Code Refactoring

• Reduced Complexity: Refactored methods from 6-7 nesting levels to ≤5
• Extract Methods: Improved maintainability through helper method extraction
• Static Methods: Added @staticmethod decorators where appropriate
• Type Safety: Enhanced mypy compliance with proper type narrowing

📈 Testing & Coverage

Coverage Improvements

• 90% Coverage: Increased from 86% to 90% (+5% improvement)
• Pattern Detectors: From 0% to 99% coverage
• New Test Cases: Added 4 comprehensive test cases for EO026/EO027
• Integration Tests: Enhanced end-to-end testing for new checkers

Test Quality

• 100 Tests: All tests pass with enhanced coverage
• False Positive Prevention: Added tests ensuring clean code doesn't trigger violations
• Real-world Scenarios: Added aliasing and defensive copy test cases

🏗️ Architecture Improvements

Type Safety

• MyPy Clean: Fixed all type errors with proper AsyncFunctionDef support
• Type Assertions: Added strategic type narrowing for complex AST patterns
• Null Safety: Enhanced null checking for optional attributes

Documentation

• Updated README: Comprehensive error code documentation with examples
• Project Structure: Updated to reflect new modular architecture
• Coverage Badge: Updated to reflect improved test coverage (90%)

🐛 Bug Fixes

• Pattern Detector Integration: Fixed unused pattern detectors (0% → 99% coverage)
• Type Compatibility: Resolved mypy errors with union types
• Whitespace Handling: Consistent code formatting across all files

⚠️ Breaking Changes

• Mutable Objects: EO008 now focuses specifically on dataclass violations
• New Error Codes: Code that was previously missed may now trigger EO015-EO027

🔄 Internal Changes

• Ruff Configuration: Added comprehensive linting rules with complexity enforcement
• Parent Tracking: Enhanced AST analysis with parent node mapping
• Modular Imports: Reorganized imports for better dependency management