Class AgentExecutor

A chain managing an agent using tools.

Example


const executor = AgentExecutor.fromAgentAndTools({
  agent: async () => loadAgentFromLangchainHub(),
  tools: [new SerpAPI(), new Calculator()],
  returnIntermediateSteps: true,
});

const result = await executor.invoke({
  input: `Who is Olivia Wilde's boyfriend? What is his current age raised to the 0.23 power?`,
});

Hierarchy

  • BaseChain<ChainValues, AgentExecutorOutput>
    • AgentExecutor

Constructors

constructor

Properties

agent earlyStoppingMethod handleParsingErrors returnIntermediateSteps tools maxIterations? memory?

Accessors

inputKeys outputKeys shouldContinueGetter

Methods

apply call invoke prepOutputs run serialize deserialize fromAgentAndTools

Constructors

constructor

Properties

agent

agent: BaseSingleActionAgent | BaseMultiActionAgent

earlyStoppingMethod

earlyStoppingMethod: StoppingMethod = "force"

handleParsingErrors

handleParsingErrors: string | boolean | ((e) => string) = false

How to handle errors raised by the agent's output parser. Defaults to False, which raises the error.

If true, the error will be sent back to the LLM as an observation. If a string, the string itself will be sent to the LLM as an observation. If a callable function, the function will be called with the exception as an argument, and the result of that function will be passed to the agent as an observation.

Type declaration

    • (e): string

    • Parameters

      • e: OutputParserException | ToolInputParsingException

      Returns string

returnIntermediateSteps

returnIntermediateSteps: boolean = false

tools

tools: StructuredTool<ZodObject<any, any, any, any, {}>>[]

Optional maxIterations

maxIterations?: number = 15

Optional memory

memory?: BaseMemory

Accessors

inputKeys

  • get inputKeys(): string[]

  • Returns string[]

outputKeys

  • get outputKeys(): string[]

  • Returns string[]

shouldContinueGetter

  • get shouldContinueGetter(): ((iterations) => boolean)

  • Returns ((iterations) => boolean)

      • (iterations): boolean

      • Method that checks if the agent execution should continue based on the number of iterations.

        Parameters

        • iterations: number

          The current number of iterations.

        Returns boolean

        A boolean indicating whether the agent execution should continue.

Methods

apply

  • Call the chain on all inputs in the list

    Parameters

    • inputs: ChainValues[]
    • Optional config: (BaseCallbackConfig | Callbacks)[]

    Returns Promise<ChainValues[]>

call

  • Run the core logic of this chain and add to output if desired.

    Wraps _call and handles memory.

    Parameters

    • values: ChainValues & {
          signal?: AbortSignal;
          timeout?: number;
      }
    • Optional config: BaseCallbackConfig | Callbacks
    • Optional tags: string[]

      Deprecated

    Returns Promise<ChainValues>

invoke

  • Invoke the chain with the provided input and returns the output.

    Parameters

    • input: ChainValues

      Input values for the chain run.

    • Optional config: BaseCallbackConfig

      Optional configuration for the Runnable.

    Returns Promise<ChainValues>

    Promise that resolves with the output of the chain run.

prepOutputs

  • Parameters

    • inputs: Record<string, unknown>
    • outputs: Record<string, unknown>
    • returnOnlyOutputs: boolean = false

    Returns Promise<Record<string, unknown>>

run

  • Parameters

    • input: any
    • Optional config: BaseCallbackConfig | Callbacks

    Returns Promise<string>

serialize

Static deserialize

  • Load a chain from a json-like object describing it.

    Parameters

    Returns Promise<BaseChain<ChainValues, ChainValues>>

Static fromAgentAndTools

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