Class ZeroShotAgent

Agent for the MRKL chain.

Example


const agent = new ZeroShotAgent({
  llmChain: new LLMChain({
    llm: new ChatOpenAI({ temperature: 0 }),
    prompt: ZeroShotAgent.createPrompt([new SerpAPI(), new Calculator()], {
      prefix: `Answer the following questions as best you can, but speaking as a pirate might speak. You have access to the following tools:`,
      suffix: `Begin! Remember to speak as a pirate when giving your final answer. Use lots of "Args"
Question: {input}
{agent_scratchpad}`,
      inputVariables: ["input", "agent_scratchpad"],
    }),
  }),
  allowedTools: ["search", "calculator"],
});

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

Deprecated

Use the method instead.

Hierarchy (view full)

Agent
- ZeroShotAgent

Index

Constructors

constructor

new ZeroShotAgent(input): ZeroShotAgent
Parameters
- input: ZeroShotAgentInput
Returns ZeroShotAgent
Overrides Agent.constructor
- Defined in langchain/src/agents/mrkl/index.ts:70

Properties

ToolType

ToolType: ToolInterface<ZodObjectAny>

llmChain

llmChain: LLMChain<string, LLMType>

outputParser

outputParser: undefined | AgentActionOutputParser

Accessors

allowedTools

get allowedTools(): undefined | string[]
Returns undefined | string[]
Inherited from Agent.allowedTools
- Defined in langchain/src/agents/agent.ts:491

inputKeys

get inputKeys(): string[]
Returns string[]
Inherited from Agent.inputKeys
- Defined in langchain/src/agents/agent.ts:495

returnValues

get returnValues(): string[]
Returns string[]
Inherited from Agent.returnValues
- Defined in langchain/src/agents/agent.ts:57

Methods

constructScratchPad

constructScratchPad(steps): Promise<string | BaseMessage[]>
Construct a scratchpad to let the agent continue its thought process
Parameters
- steps: AgentStep[]
Returns Promise<string | BaseMessage[]>
Inherited from Agent.constructScratchPad
- Defined in langchain/src/agents/agent.ts:576

finishToolName

finishToolName(): string
Name of tool to use to terminate the chain.

Returns string
Inherited from Agent.finishToolName
- Defined in langchain/src/agents/agent.ts:569

llmPrefix

llmPrefix(): string
Prefix to append the LLM call with.

Returns string
Overrides Agent.llmPrefix
- Defined in langchain/src/agents/mrkl/index.ts:84

observationPrefix

observationPrefix(): string
Prefix to append the observation with.

Returns string
Overrides Agent.observationPrefix
- Defined in langchain/src/agents/mrkl/index.ts:80

plan

plan(steps, inputs, callbackManager?): Promise<AgentAction | AgentFinish>
Decide what to do given some input.
Parameters
- steps: AgentStep[]
  Steps the LLM has taken so far, along with observations from each.
- inputs: ChainValues
  User inputs.
- OptionalcallbackManager: CallbackManager
  Callback manager to use for this call.
Returns Promise<AgentAction | AgentFinish>
Action specifying what tool to use.
Inherited from Agent.plan
- Defined in langchain/src/agents/agent.ts:623

prepareForOutput

prepareForOutput(_returnValues, _steps): Promise<Record<string, any>>
Prepare the agent for output, if needed
Parameters
- _returnValues: Record<string, any>
- _steps: AgentStep[]
Returns Promise<Record<string, any>>
Inherited from Agent.prepareForOutput
- Defined in langchain/src/agents/agent.ts:99

returnStoppedResponse

returnStoppedResponse(earlyStoppingMethod, steps, inputs, callbackManager?): Promise<AgentFinish>
Return response when agent has been stopped due to max iterations
Parameters
- earlyStoppingMethod: StoppingMethod
- steps: AgentStep[]
- inputs: ChainValues
- OptionalcallbackManager: CallbackManager
Returns Promise<AgentFinish>
Inherited from Agent.returnStoppedResponse
- Defined in langchain/src/agents/agent.ts:634

toJSON

toJSON(): Serialized
Returns Serialized
Inherited from Agent.toJSON
- Defined in langchain-core/dist/load/serializable.d.ts:69

toJSONNotImplemented

toJSONNotImplemented(): SerializedNotImplemented
Returns SerializedNotImplemented
Inherited from Agent.toJSONNotImplemented
- Defined in langchain-core/dist/load/serializable.d.ts:70

`Static`createPrompt

createPrompt(tools, args?): PromptTemplate<any, any>
Create prompt in the style of the zero shot agent.
Parameters
- tools: ToolInterface<ZodObjectAny>[]
  List of tools the agent will have access to, used to format the prompt.
- Optionalargs: ZeroShotCreatePromptArgs
  Arguments to create the prompt with.
Returns PromptTemplate<any, any>
Overrides Agent.createPrompt
- Defined in langchain/src/agents/mrkl/index.ts:121

`Static`deserialize

deserialize(data): Promise<ZeroShotAgent>
Load an agent from a json-like object describing it.
Parameters
- data: SerializedZeroShotAgent & {
  llm?: BaseLanguageModelInterface<any, BaseLanguageModelCallOptions>;
  tools?: ToolInterface<ZodObjectAny>[];
  }
Returns Promise<ZeroShotAgent>
Overrides Agent.deserialize
- Defined in langchain/src/agents/mrkl/index.ts:176

`Static`fromLLMAndTools

fromLLMAndTools(llm, tools, args?): ZeroShotAgent
Creates a ZeroShotAgent from a Large Language Model and a set of tools.
Parameters
- llm: BaseLanguageModelInterface<any, BaseLanguageModelCallOptions>
  The Large Language Model to use.
- tools: ToolInterface<ZodObjectAny>[]
  The tools for the agent to use.
- Optionalargs: ZeroShotCreatePromptArgs & AgentArgs
  Optional arguments for creating the agent.
Returns ZeroShotAgent
A new instance of ZeroShotAgent.
Overrides Agent.fromLLMAndTools
- Defined in langchain/src/agents/mrkl/index.ts:154

`Static`getDefaultOutputParser

getDefaultOutputParser(fields?): ZeroShotAgentOutputParser
Returns the default output parser for the ZeroShotAgent.
Parameters
- Optionalfields: OutputParserArgs
  Optional arguments for the output parser.
Returns ZeroShotAgentOutputParser
An instance of ZeroShotAgentOutputParser.
Overrides Agent.getDefaultOutputParser
- Defined in langchain/src/agents/mrkl/index.ts:93

`Static`validateTools

validateTools(tools): void
Validates the tools for the ZeroShotAgent. Throws an error if any tool does not have a description.
Parameters
- tools: ToolInterface<ZodObjectAny>[]
  List of tools to validate.
Returns void
Overrides Agent.validateTools
- Defined in langchain/src/agents/mrkl/index.ts:102

Class ZeroShotAgent

Example

Deprecated

Hierarchy (view full)

Index

Constructors

Properties

Accessors

Methods

Constructors

constructor

Parameters

Returns ZeroShotAgent

Properties

ToolType

llmChain

outputParser

Accessors

allowedTools

Returns undefined | string[]

inputKeys

Returns string[]

returnValues

Returns string[]

Methods

constructScratchPad

Parameters

Returns Promise<string | BaseMessage[]>

finishToolName

Returns string

llmPrefix

Returns string

observationPrefix

Returns string

plan

Parameters

Returns Promise<AgentAction | AgentFinish>

prepareForOutput

Parameters

Returns Promise<Record<string, any>>

returnStoppedResponse

Parameters

Returns Promise<AgentFinish>

toJSON

Returns Serialized

toJSONNotImplemented

Returns SerializedNotImplemented

StaticcreatePrompt

Parameters

Returns PromptTemplate<any, any>

Staticdeserialize

Parameters

Returns Promise<ZeroShotAgent>

StaticfromLLMAndTools

Parameters

Returns ZeroShotAgent

StaticgetDefaultOutputParser

Parameters

Returns ZeroShotAgentOutputParser

StaticvalidateTools

Parameters

Returns void

Settings

On This Page

`Static`createPrompt

`Static`deserialize

`Static`fromLLMAndTools

`Static`getDefaultOutputParser

`Static`validateTools