What problem does it solve? Coordinating multiple coding CLIs (Claude Code, Codex, OpenCode, Aider) and APX-managed agents from inside an active session requires knowing the exact APX commands, channels, and relay conventions; this Skill gives an engine the correct command surface so it never invents subcommands or misuses channels. ## Core Features & Use Cases - Super-agent execution: Run one-shot prompts via apx exec on cli, code, or custom channels, with persistent code sessions that can be resumed by id. - Agent-to-agent relay: Send messages to APX agents (including the super-agent) with apx send --deliver, keeping threaded history and enabling replies back into your session via apx session resume. - State inspection: Query daemon health, registered projects, cross-engine sessions, curated agent memory, and message logs with apx status, apx sessions list, apx memory, and apx messages tail. - Use Case: While working in Claude Code, the user says "preguntale a Roby que me avise cuando termines" — you send an a2a message with your engine and session id, get Roby's reply on stdout, and Roby can later inject a follow-up directly into your transcript. ## Quick Start Ask the agent to check APX daemon health and list active sessions by running apx status and apx sessions list for the current project.