OpenRouter Agent SDK for Python

About

An async-first Python toolkit for building agents on OpenRouter, distributed as openrouter-agent-sdk. It ports the public behavior of the TypeScript @openrouter/agent package: Responses API calls, client and server tools, streaming, multi-turn state, approval and human-in-the-loop gates, tool context, stop conditions, and compatibility with Claude and OpenAI chat formats. It layers on the official openrouter Python SDK rather than reimplementing HTTP, auth, retries, or model schemas, and is kept in sync with the TypeScript reference automatically, so Python users get parity without waiting for a hand-written port.