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Major Features

  • Chat Architecture - Multi-participant chat mechanism with conversation coordination, and automatic summaries
  • ReAct Tool Use - New ReAct (Reasoning and Acting) driver for advanced tool-based reasoning patterns alongside existing tool calling capabilities
  • Script System Refactoring - Script functionality moved from templates to dedicated messages package with enhanced rendering capabilities

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Chat System

  • Multi-Participant Chats - Support for multiple LLM participants, human participants, and tool-equipped agents in conversation flows
  • Chat Coordination - Built-in coordinators including LLM-based, tool-based, and round-robin participant selection
  • Conversation Summaries - Automatic chat summarization with configurable buffering and context management
  • Chat State Management - Comprehensive state tracking with steps, outcomes, and continuation criteria
  • Chat Events - Complete event system for monitoring chat lifecycle, participant selection, and tool usage

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Tool Use Enhancements

  • ReAct Driver - New reasoning and acting pattern for more sophisticated tool use with decision tracking
  • Tool Calling Refactoring - Enhanced tool calling driver with improved error handling and execution flow
  • Tool Execution Formatting - Better formatting and display of tool execution results
  • Multiple Driver Support - Clean separation between ReAct and tool calling approaches

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Architecture Improvements

  • Messages Package - Script system relocated from templates to messages package for better separation of concerns
  • Rendering System - New arrow-pipe messages renderer and role-based rendering capabilities
  • Time Management - Added clock interfaces for better testability and time-dependent operations
  • Continuation Criteria - Enhanced continuation logic with token limits, execution time limits, and step limits

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Core Enhancements

  • Structured Output - Improved deserialization and streaming capabilities for structured data
  • HTTP Client - Enhanced HTTP client handling with better error management
  • Documentation Testing - Major Doctest architecture refactoring with improved code block extraction and validation
  • Cohere Integration - Fixed max_tokens parameter handling for Cohere API

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Bug Fixes

  • Property Info Adapter - Enhanced compatibility with PropertyInfo v7 for better type introspection
  • Test Infrastructure - Added comprehensive fake inference drivers and mock HTTP testing capabilities
  • Memory Management - Improved memory handling in streaming and sequence processing

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Testing & Quality

  • Test Coverage - New test suites for Chat, ToolUse, and Doctest functionality
  • Mock Infrastructure - Enhanced testing infrastructure with fake drivers and HTTP mocking
  • Static Analysis - Updated PHPStan and Psalm configurations for better code quality

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Documentation

  • Package Documentation - Updated CHEATSHEET.md files across packages with comprehensive usage examples
  • Chat Documentation - New dedicated documentation for chat and tool use patterns
  • Architecture Guides - Enhanced OVERVIEW.md files explaining package internals and design decisions
Full Changelog: v1.5.0…v1.6.0