Usage skill

AutoMobile publishes one usage skill, auto-mobile-usage, through the Skills over MCP extension. It tells an agent how to drive devices: acquire a session first, observe before acting, read resources instead of calling tools for state, run long operations as tasks, and handle the typed errors capacity_exhausted, device_service_disabled and device_owned_by_other_session.

A host loads it on demand, so it adds nothing to tools/list, resources/list or the default context. The server declares the io.modelcontextprotocol/skills extension at initialize; whether the skill is used depends on the host, and few hosts consume Skills over MCP yet.

Call	Result
Skills list request	One entry: skill://auto-mobile-usage/SKILL.md.
Skills get request	The entry for that URI, with file digest.
Resource read on that URI	The skill text, served without a device or daemon.

A request for an unknown skill URI is refused. The same text works over the stdio proxy, the daemon HTTP endpoint and the direct server.