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Multi agent supervisor examples seem to have a type error #145

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opened 2026-02-15 17:16:17 -05:00 by yindo · 3 comments
yindo commented 2026-02-15 17:16:17 -05:00
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Originally created by @ghost on GitHub (Dec 12, 2024).

Hello, I'm trying to follow the examples in the documentation to create a multi agent supervisor, either this one:

https://langchain-ai.github.io/langgraphjs/tutorials/multi_agent/agent_supervisor/#create-agent-supervisor

Or the more recent one:

https://github.com/langchain-ai/langgraphjs/blob/main/examples/multi_agent/agent_supervisor.ipynb?ref=blog.langchain.dev

In both cases I'm getting a type error when trying to add the supervisorChain as a node.

Argument of type 'Runnable<InputValues<string>, Record<string, any> | undefined, RunnableConfig<Record<string, any>>>' is not assignable to parameter of type 'RunnableLike<InputValues<string>, UpdateType<{ messages: BinaryOperatorAggregate<BaseMessage[], BaseMessage[]>; next: BinaryOperatorAggregate<string, string>; }> & Record<...>, LangGraphRunnableConfig<...>>'. Type 'Runnable<InputValues<string>, Record<string, any> | undefined, RunnableConfig<Record<string, any>>>' is not assignable to type 'RunnableMapLike<InputValues<string>, UpdateType<{ messages: BinaryOperatorAggregate<BaseMessage[], BaseMessage[]>; next: BinaryOperatorAggregate<string, string>; }> & Record<...>>'. Index signature for type 'string' is missing in type 'Runnable<InputValues<string>, Record<string, any> | undefined, RunnableConfig<Record<string, any>>>'

I'm sorry if I'm doing something wrong on my end, but this is beyond my understanding of the inner workings of LangGraph.
Any help (or updates to the documentation) would be appreciated.

Originally created by @ghost on GitHub (Dec 12, 2024). Hello, I'm trying to follow the examples in the documentation to create a multi agent supervisor, either this one: https://langchain-ai.github.io/langgraphjs/tutorials/multi_agent/agent_supervisor/#create-agent-supervisor Or the more recent one: https://github.com/langchain-ai/langgraphjs/blob/main/examples/multi_agent/agent_supervisor.ipynb?ref=blog.langchain.dev In both cases I'm getting a type error when trying to add the supervisorChain as a node. `Argument of type 'Runnable<InputValues<string>, Record<string, any> | undefined, RunnableConfig<Record<string, any>>>' is not assignable to parameter of type 'RunnableLike<InputValues<string>, UpdateType<{ messages: BinaryOperatorAggregate<BaseMessage[], BaseMessage[]>; next: BinaryOperatorAggregate<string, string>; }> & Record<...>, LangGraphRunnableConfig<...>>'. Type 'Runnable<InputValues<string>, Record<string, any> | undefined, RunnableConfig<Record<string, any>>>' is not assignable to type 'RunnableMapLike<InputValues<string>, UpdateType<{ messages: BinaryOperatorAggregate<BaseMessage[], BaseMessage[]>; next: BinaryOperatorAggregate<string, string>; }> & Record<...>>'. Index signature for type 'string' is missing in type 'Runnable<InputValues<string>, Record<string, any> | undefined, RunnableConfig<Record<string, any>>>'` I'm sorry if I'm doing something wrong on my end, but this is beyond my understanding of the inner workings of LangGraph. Any help (or updates to the documentation) would be appreciated.
yindo closed this issue 2026-02-15 17:16:17 -05:00
yindo commented 2026-02-15 17:16:18 -05:00
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@jacoblee93 commented on GitHub (Dec 12, 2024):

Hey @gpembark!

Can you share your package.json and make sure you're on the latest versions of everything?

@jacoblee93 commented on GitHub (Dec 12, 2024): Hey @gpembark! Can you share your `package.json` and make sure you're on the latest versions of everything?
yindo commented 2026-02-15 17:16:18 -05:00
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@ghost commented on GitHub (Dec 12, 2024):

Hey @jacoblee93, thank you. Here's my package.json, and btw this made it work:

const supervisorChain = formattedPrompt
  .pipe(
    llm.bindTools([routingTool], {
      tool_choice: "route",
    })
  )
  .pipe((x) => ({
    next: x.tool_calls?.at(0)?.args.next,
    messages: [],
  }));

And here is the package.json:

"dependencies": {
    "@ai-sdk/anthropic": "1.0.*",
    "@ai-sdk/openai": "1.0.*",
    "@auth0/nextjs-auth0": "^3.5.0",
    "@langchain/core": "^0.3.22",
    "@langchain/langgraph": "^0.2.27",
    "@langchain/openai": "^0.3.14",
    "@mailchimp/mailchimp_transactional": "^1.0.59",
    "@next/bundle-analyzer": "^15.0.2",
    "@next/third-parties": "^14.2.15",
    "@radix-ui/react-accordion": "^1.2.1",
    "@radix-ui/react-collapsible": "^1.1.1",
    "@radix-ui/react-icons": "^1.3.0",
    "@radix-ui/react-toast": "^1.2.2",
    "@radix-ui/themes": "^3.1.3",
    "@reduxjs/toolkit": "^2.3.0",
    "@types/react-image-gallery": "^1.2.4",
    "@vis.gl/react-google-maps": "^1.4.0",
    "ably": "^2.5.0",
    "ai": "4.0.*",
    "classnames": "^2.5.1",
    "cookies-next": "^4.2.1",
    "dayjs": "^1.11.13",
    "google": "link:@next/third-parties/google",
    "jose": "^5.9.4",
    "langsmith": "^0.1.65",
    "mailchimp_transactional": "link:@types/mailchimp/mailchimp_transactional",
    "mongoose": "^8.6.3",
    "nanoid": "^5.0.7",
    "next-intl": "^3.20.0",
    "next-themes": "^0.3.0",
    "pino": "^9.4.0",
    "pino-pretty": "^11.2.2",
    "react": "18.3.1",
    "react-dom": "18.3.1",
    "react-fast-compare": "^3.2.2",
    "react-image-gallery": "^1.3.0",
    "react-markdown": "^9.0.1",
    "react-redux": "^9.1.2",
    "react-responsive": "^10.0.0",
    "react-spinners": "^0.14.1",
    "remark-breaks": "^4.0.0",
    "remark-gfm": "^4.0.0",
    "sharp": "^0.33.5",
    "styled-components": "^6.1.13",
    "swr": "^2.2.5",
    "unsplash-js": "^7.0.19",
    "zod": "^3.23.8"
  },
  "devDependencies": {
    "@testing-library/jest-dom": "^6.5.0",
    "@testing-library/react": "^16.0.1",
    "@types/facebook-nodejs-business-sdk": "^20.0.2",
    "@types/jest": "^29.5.13",
    "@types/mailchimp__mailchimp_transactional": "^1.0.10",
    "@types/mixpanel": "^2.14.9",
    "@types/node": "^20.16.6",
    "@types/react": "^18",
    "@types/react-dom": "^18",
    "eslint": "^8",
    "eslint-config-next": "15.0.0-canary.165",
    "jest": "^29.7.0",
    "jest-environment-jsdom": "^29.7.0",
    "mongodb-memory-server": "^10.1.2",
    "next": "14.2.15",
    "postcss-import": "^16.1.0",
    "ts-node": "^10.9.2",
    "tsx": "^4.19.1",
    "typescript": "^5.6.2",
    "vercel": "^37.14.0"
  }
@ghost commented on GitHub (Dec 12, 2024): Hey @jacoblee93, thank you. Here's my package.json, and btw this made it work: ``` const supervisorChain = formattedPrompt .pipe( llm.bindTools([routingTool], { tool_choice: "route", }) ) .pipe((x) => ({ next: x.tool_calls?.at(0)?.args.next, messages: [], })); ``` And here is the package.json: ``` "dependencies": { "@ai-sdk/anthropic": "1.0.*", "@ai-sdk/openai": "1.0.*", "@auth0/nextjs-auth0": "^3.5.0", "@langchain/core": "^0.3.22", "@langchain/langgraph": "^0.2.27", "@langchain/openai": "^0.3.14", "@mailchimp/mailchimp_transactional": "^1.0.59", "@next/bundle-analyzer": "^15.0.2", "@next/third-parties": "^14.2.15", "@radix-ui/react-accordion": "^1.2.1", "@radix-ui/react-collapsible": "^1.1.1", "@radix-ui/react-icons": "^1.3.0", "@radix-ui/react-toast": "^1.2.2", "@radix-ui/themes": "^3.1.3", "@reduxjs/toolkit": "^2.3.0", "@types/react-image-gallery": "^1.2.4", "@vis.gl/react-google-maps": "^1.4.0", "ably": "^2.5.0", "ai": "4.0.*", "classnames": "^2.5.1", "cookies-next": "^4.2.1", "dayjs": "^1.11.13", "google": "link:@next/third-parties/google", "jose": "^5.9.4", "langsmith": "^0.1.65", "mailchimp_transactional": "link:@types/mailchimp/mailchimp_transactional", "mongoose": "^8.6.3", "nanoid": "^5.0.7", "next-intl": "^3.20.0", "next-themes": "^0.3.0", "pino": "^9.4.0", "pino-pretty": "^11.2.2", "react": "18.3.1", "react-dom": "18.3.1", "react-fast-compare": "^3.2.2", "react-image-gallery": "^1.3.0", "react-markdown": "^9.0.1", "react-redux": "^9.1.2", "react-responsive": "^10.0.0", "react-spinners": "^0.14.1", "remark-breaks": "^4.0.0", "remark-gfm": "^4.0.0", "sharp": "^0.33.5", "styled-components": "^6.1.13", "swr": "^2.2.5", "unsplash-js": "^7.0.19", "zod": "^3.23.8" }, "devDependencies": { "@testing-library/jest-dom": "^6.5.0", "@testing-library/react": "^16.0.1", "@types/facebook-nodejs-business-sdk": "^20.0.2", "@types/jest": "^29.5.13", "@types/mailchimp__mailchimp_transactional": "^1.0.10", "@types/mixpanel": "^2.14.9", "@types/node": "^20.16.6", "@types/react": "^18", "@types/react-dom": "^18", "eslint": "^8", "eslint-config-next": "15.0.0-canary.165", "jest": "^29.7.0", "jest-environment-jsdom": "^29.7.0", "mongodb-memory-server": "^10.1.2", "next": "14.2.15", "postcss-import": "^16.1.0", "ts-node": "^10.9.2", "tsx": "^4.19.1", "typescript": "^5.6.2", "vercel": "^37.14.0" } ```
yindo commented 2026-02-15 17:16:18 -05:00
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@dqbd commented on GitHub (Jul 8, 2025):

Seems to be solved, closing!

@dqbd commented on GitHub (Jul 8, 2025): Seems to be solved, closing!
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Reference: langchain-ai/langgraphjs#145
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