[Release] langchain-ai/langchain langchain-huggingface==1.2.1: langchain-huggingface==1.2.1

langchain-huggingface version 1.2.1 release includes compatibility fixes for huggingface-hub 1.x, dependency updates for transformers and sentence-transformers, and a bump of langgraph-checkpoint to 4.0.0. The release also features improvements to model profiles with new text_inputs and text_outputs fields, along with various maintenance updates including security patches for pillow and urllib3.

Key Points

• •Fixed HuggingFace Hub 1.x compatibility issues to ensure seamless integration with the latest HuggingFace library versions
• •Upgraded transformers and sentence-transformers lower bounds to enforce minimum dependency versions and improve stability
• •Switched integration test provider to Together for more reliable and consistent testing infrastructure
• •Bumped langgraph-checkpoint from 3.0.0 to 4.0.0, indicating a major version upgrade with potential breaking changes
• •Added `text_inputs` and `text_outputs` fields to model profiles for enhanced metadata and configuration capabilities
• •Updated critical security dependencies including Pillow (11.3.0 → 12.1.1) and urllib3 (→ 2.6.3)
• •Upgraded LangSmith from 0.4.32rc0 to 0.6.3, bringing significant improvements and stabilization
• •Implemented stable model profile sorting by model ID to ensure consistent diffs and reproducible builds
• •Added comprehensive type checking support with `make type` target in Makefile for improved code quality
• •Enforced absolute imports across all packages to eliminate relative import issues and improve maintainability

Workflow Diagram

Concepts