> ## Documentation Index
> Fetch the complete documentation index at: https://langchain-5e9cc07a-preview-update-1770920925-e15dbde.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Changelog

> Log of updates and improvements to our JavaScript/TypeScript packages

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<Update label="Jan 14, 2026" tags={["langgraph"]} rss={{ title: "Jan 14, 2026 - langgraph" }}>
  ## v1.1.0

  ### `@langchain/langgraph`

  Introducing **StateSchema** - a cleaner, library-agnostic way to define graph state that works with any [Standard Schema](https://github.com/standard-schema/standard-schema)-compliant validation library.

  ### Standard JSON Schema support

  LangGraph now supports [Standard JSON Schema](https://standardschema.dev/json-schema), an open specification implemented by Zod 4, Valibot, ArkType, and other schema libraries. This means you can use your preferred validation library without lock-in:

  ```typescript theme={null}
  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();
  ```

  ### 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.

  ### Type helper exports

  New exported type utilities for typing functions outside the graph builder:

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

  ```typescript theme={null}
  // 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);
  };
  ```

  The existing `Annotation` and zod-based API continues to work unchanged - `StateSchema` is an additional option for those who prefer schema-first definitions.

  <Card title="Learn more about StateSchema" icon="book" href="/oss/javascript/javascript/langgraph/graph-api#schema">
    See the full documentation for defining graph state with StateSchema, ReducedValue, and UntrackedValue.
  </Card>

  <Card title="Learn about type utilities" icon="code" href="/oss/javascript/javascript/langgraph/graph-api#type-utilities">
    Use GraphNode and ConditionalEdgeRouter to type functions outside the graph builder.
  </Card>
</Update>

<Update label="Dec 12, 2025" tags={["langchain", "@langchain/openai", "@langchain/anthropic", "@langchain/ollama", "@langchain/community", "@langchain/xai", "@langchain/tavily", "@langchain/mongodb", "@langchain/mcp-adapters", "@langchain/google-common", "@langchain/core"]} rss={{ title: "Dec 12, 2025 - langchain" }}>
  ## v1.2.0

  ### `langchain`

  * [Structured output](/oss/javascript/langchain/structured-output): Added ability to manually set `strict` mode when using `providerStrategy` for structured output.

  ### `@langchain/openai`

  * **New provider built-in tools:** Support for [file search](/oss/javascript/langchain/tools#file-search), [web search](/oss/javascript/langchain/tools#web-search), [code interpreter](/oss/javascript/langchain/tools#code-interpreter), [image generation](/oss/javascript/langchain/tools#image-generation), [computer use](/oss/javascript/langchain/tools#computer-use), [shell](/oss/javascript/langchain/tools#shell), and [MCP connector](/oss/javascript/langchain/tools#mcp) tools.
  * **Content moderation:** New `moderateContent` option on `ChatOpenAI` for detecting and handling unsafe content.
  * Prefer responses API for GPT-5.2 Pro model.

  ## v1.3.0

  ### `@langchain/anthropic`

  * **New provider built-in tools:** Support for [text editor](/oss/javascript/langchain/tools#text-editor), [web fetch](/oss/javascript/langchain/tools#web-fetch), [computer use](/oss/javascript/langchain/tools#computer-use-1), [tool search](/oss/javascript/langchain/tools#tool-search), and [MCP toolset](/oss/javascript/langchain/tools#mcp-toolset) tools.
  * Exposed `ChatAnthropicInput` type for improved type safety.

  ## v1.1.0

  ### `@langchain/ollama`

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

  ## v1.0.0

  ### `@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.

  ### 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.
</Update>

<Update label="Nov 25, 2025" tags={["langchain"]} rss={{ title: "Nov 25, 2025 - langchain" }}>
  ## v1.1.0

  * [Model profiles](/oss/javascript/langchain/models#model-profiles): Chat models now expose supported features and capabilities through a `.profile` getter. These data are derived from [models.dev](https://models.dev), an open source project providing model capability data.
  * [Model retry middleware](/oss/javascript/langchain/middleware/built-in#model-retry): New middleware for automatically retrying failed model calls with configurable exponential backoff, improving agent reliability.
  * [Content moderation middleware](/oss/javascript/langchain/middleware/built-in#content-moderation): OpenAI content moderation middleware for detecting and handling unsafe content in agent interactions. Supports checking user input, model output, and tool results.
  * [Summarization middleware](/oss/javascript/langchain/middleware/built-in#summarization): Updated to support flexible trigger points using model profiles for context-aware summarization.
  * [Structured output](/oss/javascript/langchain/structured-output): `ProviderStrategy` support (native structured output) can now be inferred from model profiles.
  * [`SystemMessage` for `createAgent`](/oss/javascript/langchain/middleware/custom#working-with-system-messages): 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](/oss/javascript/langchain/agents#dynamic-system-prompt): Return values from `dynamicSystemPromptMiddleware` are now purely additive. When returning a [`SystemMessage`](https://reference.langchain.com/javascript/classes/_langchain_core.messages.SystemMessage.html) 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.
</Update>

<Update label="Oct 20, 2025" tags={["langchain", "langgraph"]} rss={{ title: "Oct 20, 2025 - langchain" }}>
  ## v1.0.0

  ### `langchain`

  * [Release notes](/oss/javascript/releases/langchain-v1)
  * [Migration guide](/oss/javascript/migrate/langchain-v1)

  ### `langgraph`

  * [Release notes](/oss/javascript/releases/langgraph-v1)
  * [Migration guide](/oss/javascript/migrate/langgraph-v1)

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    If you encounter any issues or have feedback, please [open an issue](https://github.com/langchain-ai/docs/issues/new?template=01-langchain.yml) so we can improve. To view v0.x documentation, [go to the archived content](https://github.com/langchain-ai/langchainjs/tree/v0.3/docs/core_docs/docs).
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</Update>

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