Add support for Langchain V1

[Uday-sidagana]

Documentation: https://docs.langchain.com/oss/python/releases/langchain-v1
Version 1.0.0
Official release around Oct 17

Github: version history, specific

[Uday-sidagana]

@Equlnox, .hub and AgentExecutor are not supported with v1.
Working snippet:

from composio_langchain import LangchainProvider
from langchain.agents import create_agent
from langchain_openai import ChatOpenAI

openai_client = ChatOpenAI(model="gpt-5")

composio = Composio(provider=LangchainProvider(), api_key="<api-key>")

# Get All the tools
tools = composio.tools.get(user_id="default", toolkits=["GITHUB"])

# Define task
task = "Star a repo composiohq/composio on GitHub"

# Define agent
agent = create_agent(model=openai_client, tools=tools, system_prompt="intelligent composio agent")
result = agent.invoke({
    "messages": [
        {"role": "user", "content": "Star a repo composiohq/composio on GitHub"}
    ]
})
print(result)```

[Uday-sidagana]

@haxzie, missing 'interopZodObjectMakeFieldsOptional' in v1.
Snippet:

import { LangchainProvider } from '@composio/langchain';
import { createAgent } from "langchain";
import { ChatOpenAI } from '@langchain/openai';
// initiate composio
const composio = new Composio({
  apiKey: '<api-key>',
  provider: new LangchainProvider(),
});

const githubTool = await composio.tools.get('default', 'GITHUB_STAR_REPO');

const agent = createAgent({
    model: new ChatOpenAI({ model: "gpt-5" }),
    tools: githubTool,
  });
  
  console.log(
    await agent.invoke({
      messages: [{ role: "user", content: "What's the weather in Tokyo?" }],
    })
  );

err:

              ^
SyntaxError: Export named 'interopZodObjectMakeFieldsOptional' not found in module '<directory>/LangchainV1/node_modules/@langchain/core/utils/types.js'.
      at loadAndEvaluateModule (1:11)