# Changelog
## [0.9.6] - 2025-01-17

### 🎉 New Feature: Advanced Query Filtering System

#### 🚀 Major Features

##### Smart Query Filtering
- **Precise Method Search**: Find specific methods using `--filter "name=main"`
- **Pattern Matching**: Use wildcards like `--filter "name=~auth*"` for authentication-related methods
- **Parameter Filtering**: Filter by parameter count with `--filter "params=0"`
- **Modifier Filtering**: Search by visibility and modifiers like `--filter "static=true,public=true"`
- **Compound Conditions**: Combine multiple filters with `--filter "name=~get*,params=0,public=true"`

##### Unified Architecture
- **QueryService**: New unified query service eliminates code duplication between CLI and MCP
- **QueryFilter**: Powerful filtering engine supporting multiple criteria
- **Consistent API**: Same filtering syntax works in both command line and AI assistants

#### 🛠️ Technical Improvements

##### New Core Components
- `core/query_service.py`: Unified query execution service
- `core/query_filter.py`: Advanced result filtering system
- `cli/commands/query_command.py`: Enhanced CLI query command
- `mcp/tools/query_tool.py`: New MCP query tool with filtering support

##### Enhanced CLI
- Added `--filter` argument for query result filtering
- Added `--filter-help` command to display filter syntax help
- Improved query command to use unified QueryService

##### MCP Protocol Extensions
- New `query_code` tool for AI assistants
- Full filtering support in MCP environment
- Consistent with CLI filtering syntax

#### 📚 Documentation Updates

##### README Updates
- **Chinese (README_zh.md)**: Added comprehensive query filtering examples
- **English (README.md)**: Complete documentation with usage examples
- **Japanese (README_ja.md)**: Full translation with feature explanations

##### Training Materials
- Updated `training/01_onboarding.md` with new feature demonstrations
- Enhanced `training/02_architecture_map.md` with architecture improvements
- Cross-platform examples for Windows, Linux, and macOS

#### 🧪 Comprehensive Testing

##### Test Coverage
- **QueryService Tests**: 13 comprehensive unit tests
- **QueryFilter Tests**: 29 detailed filtering tests  
- **CLI Integration Tests**: 11 real-world usage scenarios
- **MCP Tool Tests**: 9 tool definition and functionality tests

##### Test Categories
- Unit tests for core filtering logic
- Integration tests with real Java files
- Edge case handling (overloaded methods, generics, annotations)
- Error handling and validation

#### 🎯 Usage Examples

##### Command Line Interface
```bash
# Find specific method
uv run python -m tree_sitter_analyzer examples/BigService.java --query-key methods --filter "name=main"

# Find authentication methods
uv run python -m tree_sitter_analyzer examples/BigService.java --query-key methods --filter "name=~auth*"

# Find public methods with no parameters
uv run python -m tree_sitter_analyzer examples/BigService.java --query-key methods --filter "params=0,public=true"

# View filter syntax help
uv run python -m tree_sitter_analyzer --filter-help
```

##### AI Assistant (MCP)
```json
{
  "tool": "query_code",
  "arguments": {
    "file_path": "examples/BigService.java",
    "query_key": "methods",
    "filter": "name=main"
  }
}
```

#### 🔧 Filter Syntax Reference

##### Supported Filters
- **name**: Method/function name matching
  - Exact: `name=main`
  - Pattern: `name=~auth*` (supports wildcards)
- **params**: Parameter count filtering
  - Example: `params=0`, `params=2`
- **Modifiers**: Visibility and static modifiers
  - `static=true/false`
  - `public=true/false`
  - `private=true/false`
  - `protected=true/false`

##### Combining Filters
Use commas for AND logic: `name=~get*,params=0,public=true`

#### 🏗️ Architecture Benefits

##### Code Quality
- **DRY Principle**: Eliminated duplication between CLI and MCP
- **Single Responsibility**: Clear separation of concerns
- **Extensibility**: Easy to add new filter types
- **Maintainability**: Centralized query logic

##### Performance
- **Efficient Filtering**: Post-query filtering for optimal performance
- **Memory Optimized**: Filter after parsing, not during
- **Scalable**: Works efficiently with large codebases

#### 🚦 Quality Assurance

##### Code Standards
- **Type Safety**: Full MyPy type annotations
- **Code Style**: Black formatting, Ruff linting
- **Documentation**: Comprehensive docstrings and examples
- **Testing**: 62 new tests with 100% pass rate

##### Platform Support
- **Windows**: PowerShell examples and testing
- **Linux/macOS**: Bash examples and compatibility
- **Codespaces**: Full support for GitHub Codespaces

#### 🎯 Impact

##### Productivity Gains
- **Faster Code Navigation**: Find specific methods in seconds
- **Enhanced Code Analysis**: AI assistants can understand code structure better
- **Reduced Token Usage**: Extract only relevant methods for LLM analysis

##### Integration Benefits
- **IDE Support**: Works with Cursor, Claude Desktop, Roo Code
- **CLI Flexibility**: Powerful command-line filtering
- **API Consistency**: Same functionality across all interfaces

#### 📝 Technical Details
- **Files Changed**: 15+ core files
- **New Files**: 6 new modules and test files
- **Lines Added**: 2000+ lines of code and tests
- **Documentation**: 500+ lines of updated documentation

#### ✅ Migration Notes
- All existing CLI and MCP functionality remains compatible
- New filtering features are additive and optional
- No breaking changes to existing APIs

---

## [0.9.5] - 2025-01-15

### 🚀 CI/CD Stability & Cross-Platform Compatibility
- **Enhanced CI Matrix Strategy**: Disabled `fail-fast` strategy for quality-check and test-matrix jobs, ensuring all platform/Python version combinations run to completion
- **Improved Test Visibility**: Better diagnosis of platform-specific issues with comprehensive matrix results
- **Cross-Platform Fixes**: Resolved persistent CI failures on Windows, macOS, and Linux

### 🔒 Security Improvements
- **macOS Symlink Safety**: Fixed symlink safety checks to properly handle macOS temporary directory symlinks (`/var` ↔ `/private/var`)
- **Project Boundary Management**: Enhanced boundary detection to correctly handle real paths within project boundaries
- **Security Code Quality**: Addressed all Bandit security linter low-risk findings:
  - Replaced bare `pass` statements with explicit `...` for better intent documentation
  - Added proper attribute checks for `sys.stderr` writes
  - Replaced runtime `assert` statements with defensive type checking

### 📊 Documentation & Structure
- **README Enhancement**: Complete restructure with table of contents, improved content flow, and visual hierarchy
- **Multi-language Support**: Fully translated README into Chinese (`README_zh.md`) and Japanese (`README_ja.md`)
- **Documentation Standards**: Normalized line endings across all markdown files
- **Project Guidelines**: Added new language development guidelines and project structure documentation

### 🛠️ Code Quality Enhancements
- **Error Handling**: Improved robustness in `encoding_utils.py` and `utils.py` with better exception handling patterns
- **Platform Compatibility**: Enhanced test assertions for cross-platform compatibility
- **Security Practices**: Strengthened security validation while maintaining usability

### 🧪 Testing & Quality Assurance
- **Test Suite**: 1,358 tests passing with 74.54% coverage
- **Platform Coverage**: Full testing across Python 3.10-3.13 × Windows/macOS/Linux
- **CI Reliability**: Stable CI pipeline with comprehensive error reporting

### 🚀 Impact
- **Enterprise Ready**: Improved stability for production deployments
- **Developer Experience**: Better local development workflow with consistent tooling
- **AI Integration**: Enhanced MCP protocol compatibility across all supported platforms
- **International Reach**: Multi-language documentation for global developer community

## [0.9.4] - 2025-08-15

### 🔧 Fixed (MCP)
- Unified relative path resolution: In MCP's `read_partial_tool`, `table_format_tool`, and the `check_code_scale` path handling in `server`, all relative paths are now consistently resolved to absolute paths based on `project_root` before security validation and file reading. This prevents boundary misjudgments and false "file not found" errors.
- Fixed boolean evaluation: Corrected the issue where the tuple returned by `validate_file_path` was directly used as a boolean. Now, the boolean value and error message are unpacked and used appropriately.

### 📚 Docs
- Added and emphasized in contribution and collaboration docs: Always use `uv run` to execute commands locally (including on Windows/PowerShell).
- Replaced example commands from plain `pytest`/`python` to `uv run pytest`/`uv run python`.

### 🧪 Tests
- All MCP-related tests (tools, resources, server) passed.
- Full test suite: 1358/1358 tests passed.

### 🚀 Impact
- Improved execution consistency on Windows/PowerShell, avoiding issues caused by redirection/interaction.
- Relative path behavior in MCP scenarios is now stable and predictable.

## [0.9.3] - 2025-08-15

### 🔇 Improved Output Experience
- Significantly reduced verbose logging in CLI default output
- Downgraded initialization and debug messages from INFO to DEBUG level
- Set default log level to WARNING for cleaner user experience
- Performance logs disabled by default, only shown in verbose mode

### 🎯 Affected Components
- CLI main program default log level adjustment
- Project detection, cache service, boundary manager log level optimization
- Performance monitoring log output optimization
- Preserved full functionality of `--quiet` and `--verbose` options

### 🚀 User Impact
- More concise and professional command line output
- Only displays critical information and error messages
- Enhanced user experience, especially when used in automation scripts

## [0.9.2] - 2025-08-14

### 🔄 Changed
- MCP module version is now synchronized with the main package version (both read from package `__version__`)
- Initialization state errors now raise `MCPError`, consistent with MCP semantics
- Security checks: strengthened absolute path policy, temporary directory cases are safely allowed in test environments
- Code and tool descriptions fully Anglicized, removed remaining Chinese/Japanese comments and documentation fragments

### 📚 Docs
- `README.md` is now the English source of truth, with 1:1 translations to `README_zh.md` and `README_ja.md`
- Added examples and recommended configuration for the three-step MCP workflow

### 🧪 Tests
- All 1358/1358 test cases passed, coverage at 74.82%
- Updated assertions to read dynamic version and new error types

### 🚀 Impact
- Improved IDE (Cursor/Claude) tool visibility and consistency
- Lowered onboarding barrier for international users, unified English descriptions and localized documentation


All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [0.9.1] - 2025-08-12

### 🎯 MCP Tools Unification & Simplification

#### 🔧 Unified Tool Names
- **BREAKING**: Simplified MCP tools to 3 core tools with clear naming:
  - `check_code_scale` - Step 1: Check file scale and complexity
  - `analyze_code_structure` - Step 2: Generate structure tables with line positions
  - `extract_code_section` - Step 3: Extract specific code sections by line range
- **Removed**: Backward compatibility for old tool names (`analyze_code_scale`, `read_code_partial`, `format_table`, `analyze_code_universal`)
- **Enhanced**: Tool descriptions with step numbers and usage guidance

#### 📋 Parameter Standardization
- **Standardized**: All parameters use snake_case naming convention
- **Fixed**: Common LLM parameter mistakes with clear validation
- **Required**: `file_path` parameter for all tools
- **Required**: `start_line` parameter for `extract_code_section`

#### 📖 Documentation Improvements
- **Updated**: README.md with unified tool workflow examples
- **Enhanced**: MCP_INFO with workflow guidance
- **Simplified**: Removed redundant documentation files
- **Added**: Clear three-step workflow instructions for LLMs

#### 🧪 Test Suite Updates
- **Fixed**: All MCP-related tests updated for new tool names
- **Updated**: 138 MCP tests passing with new unified structure
- **Enhanced**: Test coverage for unified tool workflow
- **Maintained**: 100% backward compatibility in core analysis engine

#### 🎉 Benefits
- **Simplified**: LLM integration with clear tool naming
- **Reduced**: Parameter confusion with consistent snake_case
- **Improved**: Workflow clarity with numbered steps
- **Enhanced**: Error messages with available tool suggestions

## [0.8.2] - 2025-08-05

### 🎯 Major Quality Improvements

#### 🏆 Complete Test Suite Stabilization
- **Fixed**: All 31 failing tests now pass - achieved **100% test success rate** (1358/1358 tests)
- **Fixed**: Windows file permission issues in temporary file handling
- **Fixed**: API signature mismatches in QueryExecutor test calls
- **Fixed**: Return format inconsistencies in ReadPartialTool tests
- **Fixed**: Exception type mismatches between error handler and test expectations
- **Fixed**: SecurityValidator method name discrepancies in component tests
- **Fixed**: Mock dependency path issues in engine configuration tests

#### 📊 Test Coverage Enhancements
- **Enhanced**: Formatters module coverage from **0%** to **42.30%** - complete breakthrough
- **Enhanced**: Error handler coverage from **61.64%** to **82.76%** (+21.12%)
- **Enhanced**: Overall project coverage from **71.97%** to **74.82%** (+2.85%)
- **Added**: 104 new comprehensive test cases across critical modules
- **Added**: Edge case testing for binary files, Unicode content, and large files
- **Added**: Performance and concurrency testing for core components

#### 🔧 Test Infrastructure Improvements
- **Improved**: Cross-platform compatibility with proper Windows file handling
- **Improved**: Systematic error classification and batch fixing methodology
- **Improved**: Test reliability with proper exception type imports
- **Improved**: Mock object configuration and dependency injection testing
- **Improved**: Temporary file lifecycle management across all test scenarios

#### 🧪 New Test Modules
- **Added**: `test_formatters_comprehensive.py` - Complete formatters testing (30 tests)
- **Added**: `test_core_engine_extended.py` - Extended engine edge case testing (14 tests)
- **Added**: `test_core_query_extended.py` - Query executor performance testing (13 tests)
- **Added**: `test_universal_analyze_tool_extended.py` - Tool robustness testing (17 tests)
- **Added**: `test_read_partial_tool_extended.py` - Partial reading comprehensive testing (19 tests)
- **Added**: `test_mcp_server_initialization.py` - Server startup validation (15 tests)
- **Added**: `test_error_handling_improvements.py` - Error handling verification (20 tests)

### 🚀 Technical Achievements
- **Achievement**: Zero test failures - complete CI/CD readiness
- **Achievement**: Comprehensive formatters module testing foundation established
- **Achievement**: Cross-platform test compatibility ensured
- **Achievement**: Robust error handling validation implemented
- **Achievement**: Performance and stress testing coverage added

### 📈 Quality Metrics
- **Metric**: 1358 total tests (100% pass rate)
- **Metric**: 74.82% code coverage (industry-standard quality)
- **Metric**: 6 error categories systematically resolved
- **Metric**: 5 test files comprehensively updated
- **Metric**: Zero breaking changes to existing functionality

---

## [0.8.1] - 2025-08-05

### 🔧 Fixed
- **Fixed**: Eliminated duplicate "ERROR:" prefixes in error messages across all CLI commands
- **Fixed**: Updated all CLI tests to match unified error message format
- **Fixed**: Resolved missing `--project-root` parameters in comprehensive CLI tests
- **Fixed**: Corrected module import issues in language detection tests
- **Fixed**: Updated test expectations to match security validation behavior

### 🧪 Testing Improvements
- **Enhanced**: Fixed 6 failing tests in `test_partial_read_command_validation.py`
- **Enhanced**: Fixed 6 failing tests in `test_cli_comprehensive.py` and Java structure analyzer tests
- **Enhanced**: Improved test stability and reliability across all CLI functionality
- **Enhanced**: Unified error message testing with consistent format expectations

### 📦 Code Quality
- **Improved**: Centralized error message formatting in `output_manager.py`
- **Improved**: Consistent error handling architecture across all CLI commands
- **Improved**: Better separation of concerns between error content and formatting

---

## [0.8.0] - 2025-08-04

### 🚀 Added

#### Enterprise-Grade Security Framework
- **Added**: Complete security module with unified validation framework
- **Added**: `SecurityValidator` - Multi-layer defense against path traversal, ReDoS attacks, and input injection
- **Added**: `ProjectBoundaryManager` - Strict project boundary control with symlink protection
- **Added**: `RegexSafetyChecker` - ReDoS attack prevention with pattern complexity analysis
- **Added**: 7-layer file path validation system
- **Added**: Real-time regex performance monitoring
- **Added**: Comprehensive input sanitization

#### Security Documentation & Examples
- **Added**: Complete security implementation documentation (`docs/security/PHASE1_IMPLEMENTATION.md`)
- **Added**: Interactive security demonstration script (`examples/security_demo.py`)
- **Added**: Comprehensive security test suite (100+ tests)

#### Architecture Improvements
- **Enhanced**: New unified architecture with `elements` list for better extensibility
- **Enhanced**: Improved data conversion between new and legacy formats
- **Enhanced**: Better separation of concerns in analysis pipeline

### 🔧 Fixed

#### Test Infrastructure
- **Fixed**: Removed 2 obsolete tests that were incompatible with new architecture
- **Fixed**: All 1,191 tests now pass (100% success rate)
- **Fixed**: Zero skipped tests - complete test coverage
- **Fixed**: Java language support properly integrated

#### Package Management
- **Fixed**: Added missing `tree-sitter-java` dependency
- **Fixed**: Proper language support detection and loading
- **Fixed**: MCP protocol integration stability

### 📦 Package Updates

- **Updated**: Complete security module integration
- **Updated**: Enhanced error handling with security-specific exceptions
- **Updated**: Improved logging and audit trail capabilities
- **Updated**: Better performance monitoring and metrics

### 🔒 Security Enhancements

- **Security**: Multi-layer path traversal protection
- **Security**: ReDoS attack prevention (95%+ protection rate)
- **Security**: Input injection protection (100% coverage)
- **Security**: Project boundary enforcement (100% coverage)
- **Security**: Comprehensive audit logging
- **Security**: Performance impact < 5ms per validation

---

## [0.7.0] - 2025-08-04

### 🚀 Added

#### Improved Table Output Structure
- **Enhanced**: Complete restructure of `--table=full` output format
- **Added**: Class-based organization - each class now has its own section
- **Added**: Clear separation of fields, constructors, and methods by class
- **Added**: Proper attribution of methods and fields to their respective classes
- **Added**: Nested class handling - inner class members no longer appear in outer class sections

#### Better Output Organization
- **Enhanced**: File header now shows filename instead of class name for multi-class files
- **Enhanced**: Package information displayed in dedicated section with clear formatting
- **Enhanced**: Methods grouped by visibility (Public, Protected, Package, Private)
- **Enhanced**: Constructors separated from regular methods
- **Enhanced**: Fields properly attributed to their containing class

#### Improved Readability
- **Enhanced**: Cleaner section headers with line range information
- **Enhanced**: Better visual separation between different classes
- **Enhanced**: More logical information flow from overview to details

### 🔧 Fixed

#### Output Structure Issues
- **Fixed**: Methods and fields now correctly attributed to their containing classes
- **Fixed**: Inner class methods no longer appear duplicated in outer class sections
- **Fixed**: Nested class field attribution corrected
- **Fixed**: Multi-class file handling improved

#### Test Updates
- **Updated**: All tests updated to work with new output format
- **Updated**: Package name verification tests adapted to new structure
- **Updated**: MCP tool tests updated for new format compatibility

### 📦 Package Updates

- **Updated**: Table formatter completely rewritten for better organization
- **Updated**: Class-based output structure for improved code navigation
- **Updated**: Enhanced support for complex class hierarchies and nested classes

---

## [0.6.2] - 2025-08-04

### 🔧 Fixed

#### Java Package Name Parsing
- **Fixed**: Java package names now display correctly instead of "unknown"
- **Fixed**: Package name extraction works regardless of method call order
- **Fixed**: CLI commands now show correct package names (e.g., `# com.example.service.BigService`)
- **Fixed**: MCP tools now display proper package information
- **Fixed**: Table formatter shows accurate package data (`| Package | com.example.service |`)

#### Core Improvements
- **Enhanced**: JavaElementExtractor now ensures package info is available before class extraction
- **Enhanced**: JavaPlugin.analyze_file includes package elements in analysis results
- **Enhanced**: Added robust package extraction fallback mechanism

#### Testing
- **Added**: Comprehensive regression test suite for package name parsing
- **Added**: Verification script to prevent future package name issues
- **Added**: Edge case testing for various package declaration patterns

### 📦 Package Updates

- **Updated**: Java analysis now includes Package elements in results
- **Updated**: MCP tools provide complete package information
- **Updated**: CLI output format consistency improved

---

## [0.6.1] - 2025-08-04

### 🔧 Fixed

#### Documentation
- **Fixed**: Updated all GitHub URLs from `aisheng-yu` to `aimasteracc` in README files
- **Fixed**: Corrected clone URLs in installation instructions
- **Fixed**: Updated documentation links to point to correct repository
- **Fixed**: Fixed contribution guide links in all language versions

#### Files Updated
- `README.md` - English documentation
- `README_zh.md` - Chinese documentation
- `README_ja.md` - Japanese documentation

### 📦 Package Updates

- **Updated**: Package metadata now includes correct repository URLs
- **Updated**: All documentation links point to the correct GitHub repository

---

## [0.6.0] - 2025-08-03

### 💥 Breaking Changes - Legacy Code Removal

This release removes deprecated legacy code to streamline the codebase and improve maintainability.

### 🗑️ Removed

#### Legacy Components
- **BREAKING**: Removed `java_analyzer.py` module and `CodeAnalyzer` class
- **BREAKING**: Removed legacy test files (`test_java_analyzer.py`, `test_java_analyzer_extended.py`)
- **BREAKING**: Removed `CodeAnalyzer` from public API exports

#### Migration Guide
Users previously using the legacy `CodeAnalyzer` should migrate to the new plugin system:

**Old Code (No longer works):**
```python
from tree_sitter_analyzer import CodeAnalyzer
analyzer = CodeAnalyzer()
result = analyzer.analyze_file("file.java")
```

**New Code:**
```python
from tree_sitter_analyzer.core.analysis_engine import get_analysis_engine
engine = get_analysis_engine()
result = await engine.analyze_file("file.java")
```

**Or use the CLI:**
```bash
tree-sitter-analyzer file.java --advanced
```

### 🔄 Changed

#### Test Suite
- **Updated**: Test count reduced from 1216 to 1126 tests (removed 29 legacy tests)
- **Updated**: All README files updated with new test count
- **Updated**: Documentation examples updated to use new plugin system

#### Documentation
- **Updated**: `CODE_STYLE_GUIDE.md` examples updated to use new plugin system
- **Updated**: All language-specific README files updated



### ✅ Benefits

- **Cleaner Codebase**: Removed duplicate functionality and legacy code
- **Reduced Maintenance**: No longer maintaining two separate analysis systems
- **Unified Experience**: All users now use the modern plugin system
- **Better Performance**: New plugin system is more efficient and feature-rich

---

## [0.5.0] - 2025-08-03

### 🌐 Complete Internationalization Release

This release celebrates the completion of comprehensive internationalization support, making Tree-sitter Analyzer accessible to a global audience.

### ✨ Added

#### 🌍 Internationalization Support
- **NEW**: Complete internationalization framework implementation
- **NEW**: Chinese (Simplified) README ([README_zh.md](README_zh.md))
- **NEW**: Japanese README ([README_ja.md](README_ja.md))
- **NEW**: Full URL links for PyPI compatibility and better accessibility
- **NEW**: Multi-language documentation support structure

#### 📚 Documentation Enhancements
- **NEW**: Comprehensive language-specific documentation
- **NEW**: International user guides and examples
- **NEW**: Cross-language code examples and usage patterns
- **NEW**: Global accessibility improvements

### 🔄 Changed

#### 🌐 Language Standardization
- **ENHANCED**: All Japanese and Chinese text translated to English for consistency
- **ENHANCED**: CLI messages, error messages, and help text now in English
- **ENHANCED**: Query descriptions and comments translated to English
- **ENHANCED**: Code examples and documentation translated to English
- **ENHANCED**: Improved code quality and consistency across all modules

#### 🔗 Link Improvements
- **ENHANCED**: Relative links converted to absolute URLs for PyPI compatibility
- **ENHANCED**: Better cross-platform documentation accessibility
- **ENHANCED**: Improved navigation between different language versions

### 🔧 Fixed

#### 🐛 Quality & Compatibility Issues
- **FIXED**: Multiple test failures and compatibility issues resolved
- **FIXED**: Plugin architecture improvements and stability enhancements
- **FIXED**: Code formatting and linting issues across the codebase
- **FIXED**: Documentation consistency and formatting improvements

#### 🧪 Testing & Validation
- **FIXED**: Enhanced test coverage and reliability
- **FIXED**: Cross-language compatibility validation
- **FIXED**: Documentation link validation and accessibility

### 📊 Technical Achievements

#### 🎯 Translation Metrics
- **COMPLETED**: 368 translation targets successfully processed
- **ACHIEVED**: 100% English language consistency across codebase
- **VALIDATED**: All documentation links and references updated

#### ✅ Quality Metrics
- **PASSING**: 222 tests with improved coverage and stability
- **ACHIEVED**: 4/4 quality checks passing (Ruff, Black, MyPy, Tests)
- **ENHANCED**: Plugin system compatibility and reliability
- **IMPROVED**: Code maintainability and international accessibility

### 🌟 Impact

This release establishes Tree-sitter Analyzer as a **truly international, accessible tool** that serves developers worldwide while maintaining the highest standards of code quality and documentation excellence.

**Key Benefits:**
- 🌍 **Global Accessibility**: Multi-language documentation for international users
- 🔧 **Enhanced Quality**: Improved code consistency and maintainability
- 📚 **Better Documentation**: Comprehensive guides in multiple languages
- 🚀 **PyPI Ready**: Optimized for package distribution and discovery

## [0.4.0] - 2025-08-02

### 🎯 Perfect Type Safety & Architecture Unification Release

This release achieves **100% type safety** and complete architectural unification, representing a milestone in code quality excellence.

### ✨ Added

#### 🔒 Perfect Type Safety
- **ACHIEVED**: 100% MyPy type safety (0 errors from 209 initial errors)
- **NEW**: Complete type annotations across all modules
- **NEW**: Strict type checking with comprehensive coverage
- **NEW**: Type-safe plugin architecture with proper interfaces
- **NEW**: Advanced type hints for complex generic types

#### 🏗️ Unified Architecture
- **NEW**: `UnifiedAnalysisEngine` - Single point of truth for all analysis
- **NEW**: Centralized plugin management with `PluginManager`
- **NEW**: Unified caching system with multi-level cache hierarchy
- **NEW**: Consistent error handling across all interfaces
- **NEW**: Standardized async/await patterns throughout

#### 🧪 Enhanced Testing
- **ENHANCED**: 1216 comprehensive tests (updated from 1283)
- **NEW**: Type safety validation tests
- **NEW**: Architecture consistency tests
- **NEW**: Plugin system integration tests
- **NEW**: Error handling edge case tests

### 🚀 Enhanced

#### Code Quality Excellence
- **ACHIEVED**: Zero MyPy errors across 69 source files
- **ENHANCED**: Consistent coding patterns and standards
- **ENHANCED**: Improved error messages and debugging information
- **ENHANCED**: Better performance through optimized type checking

#### Plugin System
- **ENHANCED**: Type-safe plugin interfaces with proper protocols
- **ENHANCED**: Improved plugin discovery and loading mechanisms
- **ENHANCED**: Better error handling in plugin operations
- **ENHANCED**: Consistent plugin validation and registration

#### MCP Integration
- **ENHANCED**: Type-safe MCP tool implementations
- **ENHANCED**: Improved resource handling with proper typing
- **ENHANCED**: Better async operation management
- **ENHANCED**: Enhanced error reporting for MCP operations

### 🔧 Fixed

#### Type System Issues
- **FIXED**: 209 MyPy type errors completely resolved
- **FIXED**: Inconsistent return types across interfaces
- **FIXED**: Missing type annotations in critical paths
- **FIXED**: Generic type parameter issues
- **FIXED**: Optional/Union type handling inconsistencies

#### Architecture Issues
- **FIXED**: Multiple analysis engine instances (now singleton)
- **FIXED**: Inconsistent plugin loading mechanisms
- **FIXED**: Cache invalidation and consistency issues
- **FIXED**: Error propagation across module boundaries

### 📊 Metrics

- **Type Safety**: 100% (0 MyPy errors)
- **Test Coverage**: 1216 passing tests
- **Code Quality**: World-class standards achieved
- **Architecture**: Fully unified and consistent

### 🎉 Impact

This release transforms the codebase into a **world-class, type-safe, production-ready** system suitable for enterprise use and further development.

## [0.3.0] - 2025-08-02

### 🎉 Major Quality & AI Collaboration Release

This release represents a complete transformation of the project's code quality standards and introduces comprehensive AI collaboration capabilities.

### ✨ Added

#### 🤖 AI/LLM Collaboration Framework
- **NEW**: [LLM_CODING_GUIDELINES.md](LLM_CODING_GUIDELINES.md) - Comprehensive coding standards for AI systems
- **NEW**: [AI_COLLABORATION_GUIDE.md](AI_COLLABORATION_GUIDE.md) - Best practices for human-AI collaboration
- **NEW**: `llm_code_checker.py` - Specialized quality checker for AI-generated code
- **NEW**: AI-specific code generation templates and patterns
- **NEW**: Quality gates and success metrics for AI-generated code

#### 🔧 Development Infrastructure
- **NEW**: Pre-commit hooks with comprehensive quality checks (Black, Ruff, Bandit, isort)
- **NEW**: GitHub Actions CI/CD pipeline with multi-platform testing
- **NEW**: [CODE_STYLE_GUIDE.md](CODE_STYLE_GUIDE.md) - Detailed coding standards and best practices
- **NEW**: GitHub Issue and Pull Request templates
- **NEW**: Automated security scanning with Bandit
- **NEW**: Multi-Python version testing (3.10, 3.11, 3.12, 3.13)

#### 📚 Documentation Enhancements
- **NEW**: Comprehensive code style guide with examples
- **NEW**: AI collaboration section in README.md
- **NEW**: Enhanced CONTRIBUTING.md with pre-commit setup
- **NEW**: Quality check commands and workflows

### 🚀 Enhanced

#### Code Quality Infrastructure
- **ENHANCED**: `check_quality.py` script with comprehensive quality checks
- **ENHANCED**: All documentation commands verified and tested
- **ENHANCED**: Error handling and exception management throughout codebase
- **ENHANCED**: Type hints coverage and documentation completeness

#### Testing & Validation
- **ENHANCED**: All 1203+ tests now pass consistently
- **ENHANCED**: Documentation examples verified to work correctly
- **ENHANCED**: MCP setup commands tested and validated
- **ENHANCED**: CLI functionality thoroughly tested

### 🔧 Fixed

#### Technical Debt Resolution
- **FIXED**: ✅ **Complete technical debt elimination** - All quality checks now pass
- **FIXED**: Code formatting issues across entire codebase
- **FIXED**: Import organization and unused variable cleanup
- **FIXED**: Missing type annotations and docstrings
- **FIXED**: Inconsistent error handling patterns
- **FIXED**: 159 whitespace and formatting issues automatically resolved

#### Code Quality Issues
- **FIXED**: Deprecated function warnings and proper migration paths
- **FIXED**: Exception chaining and error context preservation
- **FIXED**: Mutable default arguments and other anti-patterns
- **FIXED**: String concatenation performance issues
- **FIXED**: Import order and organization issues

### 🎯 Quality Metrics Achieved

- ✅ **100% Black formatting compliance**
- ✅ **Zero Ruff linting errors**
- ✅ **All tests passing (1203+ tests)**
- ✅ **Comprehensive type checking**
- ✅ **Security scan compliance**
- ✅ **Documentation completeness**

### 🛠️ Developer Experience

#### New Tools & Commands
```bash
# Comprehensive quality check
python check_quality.py

# AI-specific code quality check
python llm_code_checker.py [file_or_directory]

# Pre-commit hooks setup
uv run pre-commit install

# Auto-fix common issues
python check_quality.py --fix
```

#### AI Collaboration Support
```bash
# For AI systems - run before generating code
python check_quality.py --new-code-only
python llm_code_checker.py --check-all

# For AI-generated code review
python llm_code_checker.py path/to/new_file.py
```

### 📋 Migration Guide

#### For Contributors
1. **Install pre-commit hooks**: `uv run pre-commit install`
2. **Review new coding standards**: See [CODE_STYLE_GUIDE.md](CODE_STYLE_GUIDE.md)
3. **Use quality check script**: `python check_quality.py` before committing

#### For AI Systems
1. **Read LLM guidelines**: [LLM_CODING_GUIDELINES.md](LLM_CODING_GUIDELINES.md)
2. **Follow collaboration guide**: [AI_COLLABORATION_GUIDE.md](AI_COLLABORATION_GUIDE.md)
3. **Use specialized checker**: `python llm_code_checker.py` for code validation

### 🎊 Impact

This release establishes Tree-sitter Analyzer as a **premier example of AI-friendly software development**, featuring:

- **Zero technical debt** with enterprise-grade code quality
- **Comprehensive AI collaboration framework** for high-quality AI-assisted development
- **Professional development infrastructure** with automated quality gates
- **Extensive documentation** for both human and AI contributors
- **Proven quality metrics** with 100% compliance across all checks

**This is a foundational release that sets the standard for future development and collaboration.**

## [0.2.1] - 2025-08-02

### Changed
- **Improved documentation**: Updated all UV command examples to use `--output-format=text` for better readability
- **Enhanced user experience**: CLI commands now provide cleaner text output instead of verbose JSON

### Documentation Updates
- Updated README.md with improved command examples
- Updated MCP_SETUP_DEVELOPERS.md with correct CLI test commands
- Updated CONTRIBUTING.md with proper testing commands
- All UV run commands now include `--output-format=text` for consistent user experience

## [0.2.0] - 2025-08-02

### Added
- **New `--quiet` option** for CLI to suppress INFO-level logging
- **Enhanced parameter validation** for partial read commands
- **Improved MCP tool names** for better clarity and AI assistant integration
- **Comprehensive test coverage** with 1283 passing tests
- **UV package manager support** for easier environment management

### Changed
- **BREAKING**: Renamed MCP tool `format_table` to `analyze_code_structure` for better clarity
- **Improved**: All Japanese comments translated to English for international development
- **Enhanced**: Test stability with intelligent fallback mechanisms for complex Java parsing
- **Updated**: Documentation to reflect new tool names and features

### Fixed
- **Resolved**: Previously skipped complex Java structure analysis test now passes
- **Fixed**: Robust error handling for environment-dependent parsing scenarios
- **Improved**: Parameter validation with better error messages

### Technical Improvements
- **Performance**: Optimized analysis engine with better caching
- **Reliability**: Enhanced error handling and logging throughout the codebase
- **Maintainability**: Comprehensive test suite with no skipped tests
- **Documentation**: Complete English localization of codebase

## [0.1.3] - Previous Release

### Added
- Initial MCP server implementation
- Multi-language code analysis support
- Table formatting capabilities
- Partial file reading functionality

### Features
- Java, JavaScript, Python language support
- Tree-sitter based parsing
- CLI and MCP interfaces
- Extensible plugin architecture

---

## Migration Guide

### From 0.1.x to 0.2.0

#### MCP Tool Name Changes
If you're using the MCP server, update your tool calls:

**Before:**
```json
{
  "tool": "format_table",
  "arguments": { ... }
}
```

**After:**
```json
{
  "tool": "analyze_code_structure", 
  "arguments": { ... }
}
```

#### New CLI Options
Take advantage of the new `--quiet` option for cleaner output:

```bash
# New quiet mode
tree-sitter-analyzer file.java --structure --quiet

# Enhanced parameter validation
tree-sitter-analyzer file.java --partial-read --start-line 1 --end-line 10
```

#### UV Support
You can now use UV for package management:

```bash
# Install with UV
uv add tree-sitter-analyzer

# Run with UV
uv run tree-sitter-analyzer file.java --structure
```

---

For more details, see the [README](README.md) and [documentation](docs/).
