Changelog

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v1.1.0

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@langchain/langgraph

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Standard JSON Schema support

import { z } from "zod"; // or valibot, arktype, etc.
import { StateSchema, ReducedValue, MessagesValue } from "@langchain/langgraph";

const AgentState = new StateSchema({
  messages: MessagesValue,
  currentStep: z.string(),
  count: z.number().default(0),
  history: new ReducedValue(
    z.array(z.string()).default(() => []),
    {
      inputSchema: z.string(),
      reducer: (current, next) => [...current, next],
    }
  ),
});

// Type-safe state and update types
type State = typeof AgentState.State;
type Update = typeof AgentState.Update;

const graph = new StateGraph(AgentState)
  .addNode("agent", (state) => ({ count: state.count + 1 }))
  .addEdge(START, "agent")
  .addEdge("agent", END)
  .compile();

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New state value primitives

• ReducedValue: Define fields with custom reducers for accumulating values. Supports separate input and output schemas for type-safe reducer inputs.
• UntrackedValue: Define transient state that exists during execution but is never checkpointed - useful for database connections, caches, or runtime-only configuration.
• MessagesValue: A prebuilt ReducedValue for chat messages with the standard messages reducer.

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Type helper exports

• GraphNode<Schema, Nodes?, Config?> - Type node functions with full inference
• ConditionalEdgeRouter<Schema, Nodes?> - Type conditional edge routers

// Type standalone node functions
const myNode: GraphNode<typeof AgentState> = (state, config) => {
  return { count: state.count + 1 };
};

// Use schema type helpers directly
const processState = (state: typeof AgentState.State) => {
  console.log(state.count);
};

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v1.2.0

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langchain

• Structured output: Added ability to manually set strict mode when using providerStrategy for structured output.

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@langchain/openai

• New provider built-in tools: Support for file search, web search, code interpreter, image generation, computer use, shell, and MCP connector tools.
• Content moderation: New moderateContent option on ChatOpenAI for detecting and handling unsafe content.
• Prefer responses API for GPT-5.2 Pro model.

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v1.3.0

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@langchain/anthropic

• New provider built-in tools: Support for text editor, web fetch, computer use, tool search, and MCP toolset tools.
• Exposed ChatAnthropicInput type for improved type safety.

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v1.1.0

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@langchain/ollama

• Native structured outputs: Added support for native structured output via withStructuredOutput.
• Support for custom baseUrl configuration.

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v1.0.0

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@langchain/community

• Jira document loader updated to use v3 API.
• LanceDB: Added similaritySearch() and similaritySearchWithScore() support.
• Elasticsearch hybrid search support.
• New GoogleCalendarDeleteTool.
• Various bug fixes for LlamaCppEmbeddings, PrismaVectorStore, IBM WatsonX, and security improvements.

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Other packages

• @langchain/xai: Native Live Search support.
• @langchain/tavily: Added Tavily’s research endpoint.
• @langchain/mongodb: New MongoDB LLM cache.
• @langchain/mcp-adapters: Added onConnectionError option.
• @langchain/google-common: jsonSchema method support in withStructuredOutput.
• @langchain/core: Security fixes, better subgraph nesting in Mermaid graphs, UUID7 for run IDs.

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v1.1.0

• Model profiles: Chat models now expose supported features and capabilities through a .profile getter. These data are derived from models.dev, an open source project providing model capability data.
• Model retry middleware: New middleware for automatically retrying failed model calls with configurable exponential backoff, improving agent reliability.
• Content moderation middleware: OpenAI content moderation middleware for detecting and handling unsafe content in agent interactions. Supports checking user input, model output, and tool results.
• Summarization middleware: Updated to support flexible trigger points using model profiles for context-aware summarization.
• Structured output: ProviderStrategy support (native structured output) can now be inferred from model profiles.
• SystemMessage for createAgent: Support for passing SystemMessage instances directly to createAgent’s systemPrompt parameter and a new concat method for extending system messages. Enables advanced features like cache control and structured content blocks.
• Dynamic system prompt middleware: Return values from dynamicSystemPromptMiddleware are now purely additive. When returning a SystemMessage or string, they are merged with existing system messages rather than replacing them, making it easier to compose multiple middleware that modify the prompt.
• Compatibility improvements: Fixed error handling for Zod v4 validation errors in structured output and tool schemas, ensuring detailed error messages are properly displayed.

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v1.0.0

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langchain

• Release notes
• Migration guide

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langgraph

• Release notes
• Migration guide