Intergration with langserve / RemoteRunnable ?

[darthShana]

HI All
Im looking for some general guidance and some examples if they are available, I have been looking through the docs for the last few days but with no luck

Ive switched to using the new langgraph agents which i have found to be much better than before so i would like to stick with that

1. How do i use langserve with this? i Could do this

memory = SqliteSaver.from_conn_string(":memory:")
agent_chain = builder.compile(checkpointer=memory)
add_routes(app, agent_chain, path="/agent")

But how do i pass stuff like

{
  "configurable": {
      "thread_id": thread_id,
      "user_id": user_id,
  }
}

when i call stream from the RemoteRunnable client? the stream method doesn't seem to support passing in a config?
i have tried

import { RemoteRunnable } from "@langchain/core/runnables/remote";

    const remoteChain = new RemoteRunnable({
      url: "http://127.0.0.1:8100/agent",
    });

    const stream = await remoteChain.stream({
      messages: {"user": "im looking for a car"}
    }, {
      "configurable": {
        "thread_id": '5678',
        "user_id": '1234',
      }
    });

but i get

INFO:     127.0.0.1:37426 - "POST /agent/stream HTTP/1.1" 422 Unprocessable Entity

should i switch to use

import { Client } from "@langchain/langgraph-sdk";

  const assistant = await client.assistants.create({
    graphId: "agent",
    config: { configurable: { model_name: "openai" } },
  });

In which case i have a whole lot more questions about how to use that? like whats an assistant? are there any docs for this?

[hinthornw]

Hi @darthShana! We're starting to add docs on the latter option here https://langchain-ai.github.io/langgraph/cloud/quick_start/

We should have JS SDK docs for you soon as well. Thank you for your patience.!

[darthShana]

awesome thanks!

[Arslan-Mehmood1]

@darthShana how did you pass the config thread_id to langgraph with checkpointer?