Unknown agent type when loading from hub

[elier]

Loading the following agent fails with "UnhandledPromiseRejectionWarning: Error: Unknown agent type":
https://github.com/hwchase17/langchain-hub/tree/master/agents/zero-shot-react-conversation

  const model = new ChatOpenAI({ temperature: 0});
  const tools: Tool[] = [new SerpAPI(), new Calculator()];
  const agent = await loadAgent(
    "lc://agents/zero-shot-react-conversation/agent.json",
    { llm: model, tools }
  );

However, the other agent works:
https://github.com/hwchase17/langchain-hub/tree/master/agents/zero-shot-react-description

The reason is very clear, only "zero-shot-react-description" is supported:

    /**
     * Load an agent from a json-like object describing it.
     */
    static async deserialize(data) {
        switch (data._type) {
            case "zero-shot-react-description": {
                const { ZeroShotAgent } = await import("./mrkl/index.js");
                return ZeroShotAgent.deserialize(data);
            }
            default:
                throw new Error("Unknown agent type");
        }
    }

[elier]

I would like to load things from json or yaml configurations. Could someone provide details about the status of this feature, or what is the behaviour here so I could try to implement it and make a pull request.

[dosubot]

Hi, @elier! I'm helping the LangChain team manage their backlog and wanted to let you know that we are marking this issue as stale.

Based on my understanding, the issue you reported was about loading a specific agent from a GitHub repository and encountering an "Unknown agent type" error. It seems that the issue has been resolved, and it turns out that only the "zero-shot-react-description" agent is supported, not the "zero-shot-react-conversation" agent. You were also interested in the status of a feature that would allow loading from json or yaml configurations.

Before we close this issue, we wanted to check if it is still relevant to the latest version of the LangChain repository. If you could provide an update or any additional information, the LangChain team will be notified to take a look. Otherwise, if we don't hear back from you within 7 days, the issue will be automatically closed.

Thank you for your understanding!