ContextEditingMiddleware

This release introduces significant improvements to the MCP (Multi-modal Conversational Protocol) handling, including new elicitation features and tool conversion. It also brings general bug fixes and refactors across various components.

This release introduces standard model exception types and support for custom token counters in ContextEditingMiddleware. It also includes bug fixes for exception handling and schema ordering.

LangChain v1.0.0 introduces a major architectural shift focusing on agent middleware, improved HITL patterns, and a streamlined core namespace. It officially drops support for Python 3.9 and renames several key agent APIs for better consistency.

LangChain v1.0.0 introduces a major architectural shift focusing on a new middleware system, improved agent hooks, and the removal of legacy global variables and Python 3.9 support. It standardizes the agent API and enhances production features like HITL and PII filtering.