acpx

A headless CLI client for the Agent Client Protocol (ACP), enabling AI agents and orchestrators to communicate with coding agents via structured protocol commands instead of PTY scraping. Current stable version: 0.5.3 (alpha). Released frequently with breaking changes expected until stabilization. Supports persistent multi-turn sessions, named sessions, prompt queueing, cooperative cancellation, soft-close lifecycle, crash reconnect, fire-and-forget mode, config files, session inspect/history, and experimental TypeScript-based workflows. Key differentiator: agent-to-agent communication over CLI without ANSI parsing, with compatibility for multiple ACP-compatible agents (Codex, Claude, OpenClaw ACP). Requires Node.js >=22.12.0.