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Changelog

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

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[Unreleased]

Added

OpenRouter API provider support for unified access to multiple LLM models
- Support for provider/model-name format (e.g., anthropic/claude-sonnet-4.5)
- Proper API key handling with OPENROUTER_API_KEY environment variable
- Custom headers for OpenRouter attribution (HTTP-Referer, X-Title)
- Embedding fallback to OpenAI when using OpenRouter (since OpenRouter lacks embeddings)
- Comprehensive test suite for OpenRouter provider integration file:tests/test_openrouter.py
Expanded .env.example with all supported LLM provider API keys
Detailed LLM Provider Options section in README.md with examples for:
- OpenAI (default)
- Anthropic
- OpenRouter (new)
- Google Generative AI
- Ollama (local)
OpenRouter configuration example in Python usage section
Documentation updates in PROJECT.md for OpenRouter support

Changed

Updated trading_graph.py LLM provider initialization to handle OpenRouter separately with proper API key and header management file:tradingagents/graph/trading_graph.py:75-105
Enhanced memory.py embedding logic to support OpenRouter's embedding fallback behavior file:tradingagents/agents/utils/memory.py:6-27
Main.py now includes OpenRouter configuration example (commented out) for easy reference

Fixed

ChromaDB collection persistence issue by using get_or_create_collection() instead of create_collection() to prevent "collection already exists" errors and enable persistent memory across application restarts file:tradingagents/agents/utils/memory.py:29 (Issue #30)
Improved error messages for missing OPENROUTER_API_KEY when using openrouter provider
Better embedding client initialization for different LLM providers

[1.0.0] - 2025-01-01 (Example - Update with actual release date)

Added

Initial multi-agent trading framework release
Support for multiple LLM providers
Analyst team (fundamental, sentiment, news, technical)
Researcher debate mechanism
Risk management workflow
CLI interface
Integration with financial data APIs