langchain-protocol 0.0.12

Python bindings for the LangChain agent streaming protocol

langchain-protocol

Python bindings for the LangChain agent streaming protocol.

This package provides generated TypedDict and Literal definitions for the protocol's commands, events, results, and payload shapes. It does not include a runtime client, transport, or helper APIs — it is intended as a source of typing primitives only.

Installation

pip install langchain-protocol

Usage

from langchain_protocol import Command, SubscribeParams

params: SubscribeParams = {
    "channels": ["messages", "lifecycle"],
}

subscribe: Command = {
    "id": 1,
    "method": "subscription.subscribe",
    "params": params,
}

What this package includes

• TypedDict definitions for commands, events, results, and payload shapes
• Literal and union aliases for protocol enums and tagged unions
• A py.typed marker so type checkers pick up the bundled annotations