create_agent

This release primarily addresses minor bug fixes related to async middleware and structured output fallbacks, alongside adding type overloads for `create_agent`.

This release reverts a previous change regarding agent tagging and introduces deprecations for 'hub' and load/dump limits within langchain-classic.

This release introduces significant updates to streaming protocols (v2 and v3), enhances agent capabilities with new middleware features, and includes numerous dependency bumps and bug fixes across various components.

This release primarily focuses on refactoring deprecation targets within langchain-classic and includes a minor bug fix for httpx finalizers in the anthropic integration.

This release focuses on dependency updates, minor bug fixes in Fireworks, and introduces content-block-centric streaming (v2) in the core library. Deprecation messages have also been refined.

This release includes numerous performance improvements, dependency bumps, and feature additions like content-block-centric streaming (v2) and integration of stream_events(version='v3'). Several bug fixes address token counting, model recognition, and middleware configuration.

This release introduces content-block-centric streaming (v2) and support for the v3 stream protocol, alongside numerous bug fixes related to tracing, validation, and dependency updates. Path saving/loading functions for prompts have been deprecated.

This release introduces significant feature updates, including content-block-centric streaming (v2) and support for the v3 event protocol. Numerous bug fixes address issues related to tracing, serialization, SSRF hardening, and model wrapper compatibility.

This release introduces content-block-centric streaming (v2) in core and adds agent type tagging for `create_agent` calls. It also includes several dependency updates and performance improvements.

This release focuses heavily on stability, security hardening (anti-SSRF), and improved token counting, especially for multimodal inputs and tool schemas. Several prompt loading/saving methods have been deprecated due to path validation improvements.

This release focuses heavily on stability, security hardening (anti-SSRF, pygments update), and feature parity, including adding Bedrock and OpenRouter support, and enhancing token counting for multimodal inputs and tool schemas. Several internal cleanups and deprecations related to prompt saving paths were also introduced.

This release focuses on dependency updates, performance improvements, and several bug fixes, including updates for Azure AI Foundry providers and recursion limit handling in agents.

This release includes minor dependency bumps, CI improvements, and adds LangSmith integration metadata to agent and chat model initialization functions. A bug fix was also applied to the OpenAI Responses API input typing.

Version 1.2.20 of langchain-core includes security hardening, improved LangSmith integration metadata, and a fix for tracing invocation parameters.

Version 1.3.0 introduces Model Context Protocol (MCP) support, automatic beta header management for computer use, and enhanced tool capabilities including tool search and TypedDict support.

LangChain 1.1 introduces ModelRetryMiddleware, enhanced SummarizationMiddleware with context window support, and SystemMessage support in agent creation. It also includes critical fixes for tool call ordering and Anthropic tool execution.

Version 1.0.3 introduces handling for incomplete streaming events and enforces token limits for embeddings, alongside several bug fixes for API compatibility.

LangChain 1.0.5 focuses on stability by reverting SystemMessage support in create_agent, increasing the default recursion limit, and updating core dependencies.

LangChain v1.0.0 release introduces Python 3.14 support, a suite of new tool and model middleware, and significant refactoring of the agents and tools namespaces for production stability.

Initial release of LangChain v1.0.0 and Core v1.0.0rc, featuring a major refactor of middleware hooks (wrap_model_call/wrap_tool_call), async support for agents, and the removal of global variables.

LangChain v1.0.0 release featuring a major refactor of the agents API, introduction of a robust middleware system (PII, retries, limits), and namespace consolidation. It transitions the project to a stable versioning scheme with enhanced async support and improved Human-In-The-Loop patterns.

Initial release of LangChain v1.0.0 series, featuring a major refactor of middleware hooks (wrap_model_call/wrap_tool_call), improved HITL capabilities, and namespace consolidation.

LangChain v1.0.0 introduces a revamped agent API, a new middleware system for model and tool calls, and significant namespace consolidation. It transitions the codebase to Python 3.10+ and standardizes asynchronous support across core components.

Initial release of LangChain v1.0.0 (alpha stages), featuring a major refactor of the agent API, the introduction of a middleware system for LLM calls, and the removal of legacy globals and Python 3.9 support.

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.

Initial v1.0.0 alpha release series for LangChain, featuring a revamped agent architecture, improved Human-In-The-Loop patterns, and middleware support while dropping support for Python 3.9.

Initial v1 alpha release of LangChain featuring a major refactor of agent creation, introduction of middleware patterns, and the removal of Python 3.9 support.

Initial alpha releases for LangChain v1.0.0, featuring a revamped agent API, new middleware architecture, improved HITL patterns, and the removal of Python 3.9 support.

Initial alpha releases for LangChain v1.0.0, featuring a revamped agent API, middleware support, improved HITL patterns, and the removal of Python 3.9 support.

Initial alpha releases for LangChain v1.0.0, featuring a revamped agent API, middleware support, and the removal of Python 3.9 support.

Initial alpha release of LangChain v1.0.0, featuring a revamped agent creation API, middleware support, and the removal of Python 3.9 support.

Initial release introducing middleware support for the create_agent function within the langchain integration.

Initial alpha release of LangChain v1.0.0, featuring a rename of the ReAct agent creator, the removal of Python 3.9 support, and updated model integrations for Claude 3.5/3.7.

This release introduces significant new features like public link sharing for chat results and native scheduling for Copilot followups. It also includes numerous bug fixes focused on credential handling, orchestrator stability, and UI polish.

This release introduces significant new features like public chat sharing, self-distilled skills, and native scheduling for Copilot. It also includes numerous bug fixes focused on credential handling, orchestrator stability, and UI polish.