Changelog for langchain-hs

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

The format is based on Keep a Changelog, and this project adheres to the Haskell Package Versioning Policy.

Unreleased

0.0.3.0 - 2025-11-16

Added

• Added Agent middleware support.
• Added image input support for OpenAI and Gemini.

Fixed

• Fixed Ollama stream's onComplete callback.
• Fixed system_fingerprint field to be nullable.

Changed

• • Revamped Agent module with native tool_call support and improved architecture.
• • Migrated to Mercury's OpenAI client.
• • Changed Ollama params to use ChatOps type.
• • Renamed ChatMessage to ChatHistory.
• • Parameterized StreamHandler Token type.
• • Added Langchain error type for better error handling.
• Updated ollama-haskell to 0.2.1.0.

0.0.2.0 - 2025-05-04

Added

• Added OpenAI LLM integration.
• Added DirectoryLoader for loading Documents from a directory.
• Added HuggingFace LLM integration.
• Added docusaurus documentation.
• Added OpenAI embeddings integration.
• Added GHC CI matrix build.
• Added TokenBufferMemory Memory integration.
• Added RetrievalQA chain.
• Added CalculatorTool tool.

Fixed

• Fixed loadAndSplit function for PdfLoader.
• Minor documentation fixes.
• Fixed WebScraper to only scrape textual content.
• Made langchain-hs buildable till stack-lts-19.33
• Fixed React agent.

Changed

• Generalized LLMParams to accept different type per LLM.