Agent Client Protocol (Python)

Build ACP-compliant agents and clients in Python with generated schema models, asyncio transports, and runnable demos.

Releases track the upstream ACP schema; contributions that tighten coverage or tooling are always welcome.

Install

pip install agent-client-protocol
or
uv add agent-client-protocol

At a glance

• Spec parity: Generated Pydantic models in acp.schema track every ACP release so payloads stay valid.
• Direct construction: Generated discriminator fields have defaults, so models can be instantiated directly.
• Runtime ergonomics: Async base classes, stdio JSON-RPC plumbing, and lifecycle helpers keep custom agents tiny.
• Examples ready: Streaming, permissions, Gemini bridge, and duet demos live under examples/.
• Contrib utilities: Session accumulators, tool call trackers, and permission brokers share patterns from real deployments.

Who benefits

• Agent authors who need typed models and event-stream ergonomics for ACP-compatible assistants.
• Client integrators embedding ACP parties inside Python applications or wrapping existing CLIs via stdio.
• Tooling teams experimenting with permission flows, streaming UX, or Gemini bridges without re-implementing transports.

How to get started

• Follow the Quickstart guide for installation, echo-agent validation, editor wiring (e.g. Zed), and programmatic launch recipes.
• Browse the example gallery to see progressively richer integrations you can copy or extend.
• Skim the docs hub for focused references on contrib helpers, releasing, and transport details.

Quick links

| Need | Link | |--------------------|------------------------------------------------------------------------| | Docs hub | | | Quickstart | | | Use cases | | | Contrib helpers | | | Releasing workflow | | | Examples | | | Tests | | | PyPI | |

Project layout

• src/acp/: runtime package (agents, clients, transports, schema bindings, contrib utilities)
• schema/: upstream JSON schema sources (regenerate via make gen-all)
• docs/: MkDocs content backing the published documentation
• examples/: runnable scripts covering stdio orchestration patterns
• tests/: pytest suite with golden fixtures and optional Gemini coverage

Developer commands

• make install provisions the uv virtualenv and installs pre-commit hooks.
• make check runs Ruff formatting/linting, type analysis, dependency hygiene, and lock verification.
• make test executes pytest (with doctests) inside the managed environment.
• ACP_SCHEMA_VERSION= make gen-all refreshes protocol artifacts when the schema advances.

Community & support

• File issues or feature requests at .
• Discuss ideas or get help via GitHub Discussions: .
• Join the broader ACP conversations at , the Zed community channels, or the community Zulip: .
• Shared learnings, integrations, or third-party transports are welcome additions to the documentation—open a PR!