68 lines
2.2 KiB
TypeScript
68 lines
2.2 KiB
TypeScript
import { ICommonObject, INode, INodeData, INodeParams } from '../../../src/Interface'
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import { initializeAgentExecutorWithOptions, AgentExecutor } from 'langchain/agents'
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import { Tool } from 'langchain/tools'
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import { getBaseClasses } from '../../../src/utils'
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import { BaseLanguageModel } from 'langchain/base_language'
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import { flatten } from 'lodash'
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import { additionalCallbacks } from '../../../src/handler'
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class MRKLAgentLLM_Agents implements INode {
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label: string
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name: string
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version: number
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description: string
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type: string
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icon: string
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category: string
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baseClasses: string[]
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inputs: INodeParams[]
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constructor() {
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this.label = 'ReAct Agent for LLMs'
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this.name = 'mrklAgentLLM'
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this.version = 1.0
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this.type = 'AgentExecutor'
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this.category = 'Agents'
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this.icon = 'agent.svg'
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this.description = 'Agent that uses the ReAct logic to decide what action to take, optimized to be used with LLMs'
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this.baseClasses = [this.type, ...getBaseClasses(AgentExecutor)]
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this.inputs = [
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{
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label: 'Allowed Tools',
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name: 'tools',
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type: 'Tool',
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list: true
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},
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{
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label: 'Language Model',
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name: 'model',
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type: 'BaseLanguageModel'
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}
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]
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}
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async init(nodeData: INodeData): Promise<any> {
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const model = nodeData.inputs?.model as BaseLanguageModel
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let tools = nodeData.inputs?.tools as Tool[]
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tools = flatten(tools)
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const executor = await initializeAgentExecutorWithOptions(tools, model, {
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agentType: 'zero-shot-react-description',
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verbose: process.env.DEBUG === 'true' ? true : false
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})
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return executor
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}
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async run(nodeData: INodeData, input: string, options: ICommonObject): Promise<string> {
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const executor = nodeData.instance as AgentExecutor
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const callbacks = await additionalCallbacks(nodeData, options)
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const result = await executor.call({ input }, [...callbacks])
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return result?.output
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}
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}
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module.exports = { nodeClass: MRKLAgentLLM_Agents }
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