# Changelog

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).

## [Unreleased]

### Added
- Initial release preparation
- Comprehensive documentation structure
- GitHub Actions CI/CD workflows

## [0.1.0] - 2025-01-27

**Note**: This is a work-in-progress release by the OASIS-Fudan Complex System AI Social Scientist Team. Features and documentation are being actively developed.

### Added
- Core LAMB framework architecture
- Multi-paradigm support (Grid, Physics, Network)
- LLM integration capabilities
- Rule-based engine implementation
- Hybrid engine for combining approaches
- Composition-based simulation architecture
- Universal building blocks (BaseAgent, BaseEnvironment, Action)
- Spatial indexing systems (Grid, KDTree, Graph)
- Performance monitoring and metrics collection
- Comprehensive test suite
- Research API for easy simulation creation
- Configuration management system
- Serialization and checkpointing support

### Features
- **Grid Paradigm**: Discrete space simulations with boundary conditions
- **Physics Paradigm**: Continuous space simulations with collision detection
- **Network Paradigm**: Graph-based simulations with message passing
- **LLM Engine**: Integration with OpenAI GPT models for agent behavior
- **Rule Engine**: Traditional rule-based decision making
- **Hybrid Engine**: Combines multiple behavioral approaches
- **Spatial Indexing**: Efficient neighbor queries for large populations
- **Performance Optimization**: Handles 10,000+ agents efficiently
- **Research Tools**: Built-in analysis and visualization capabilities

### Technical Details
- Thread-safe implementation with proper locking mechanisms
- Memory-efficient data structures for large-scale simulations
- Caching systems for improved performance
- Comprehensive error handling and validation
- Type hints throughout the codebase
- Extensive unit and integration tests

### Documentation
- Complete API documentation with docstrings
- User guide with examples and tutorials
- Developer documentation for contributors
- Performance benchmarks and optimization guides

### Testing
- 17 comprehensive test cases covering all major functionality
- Unit tests for individual components
- Integration tests for paradigm interactions
- Performance tests for scalability validation
- Example validation tests

### Fixed
- Resolved deadlock issues in concurrent simulation execution
- Fixed spatial index boolean evaluation bugs
- Corrected agent position synchronization problems
- Eliminated infinite loop issues in test execution

### Security
- Secure API key handling for LLM integration
- Input validation and sanitization
- Safe serialization of simulation state

## [0.0.1] - 2024-10-20

### Added
- Initial project structure
- Basic framework components
- Core type definitions
- Initial test framework
