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JavaScriptlangchainindexReactAgentwithConfig
Methodā—Since v1.2

withConfig

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withConfig(config: Omit<RunnableConfig, "store" | "writer" | "interrupt">): ReactAgent<Types>
View source on GitHub

Parameters

NameTypeDescription
config*Omit<RunnableConfig, "store" | "writer" | "interrupt">

Configuration to merge with existing config

Example

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const agent = createAgent({ model: "gpt-4o", tools: [...] });

// Set a default recursion limit
const configuredAgent = agent.withConfig({ recursionLimit: 1000 });

// Chain multiple configs
const debugAgent = agent
  .withConfig({ recursionLimit: 1000 })
  .withConfig({ tags: ["debug"] });

Creates a new ReactAgent with the given config merged into the existing config. Follows the same pattern as LangGraph's Pregel.withConfig().

The merged config is applied as a default that gets merged with any config passed at invocation time (invoke/stream). Invocation-time config takes precedence.