Module message 

Structs

ActionFeedback

Intermediate progress published by the server during goal execution.

ActionResult

Terminal result returned when a goal finishes (Succeeded / Failed / Canceled).

ActionSchema

Schema descriptor for an action, covering the goal, feedback, and result message types.

ActionSessionHealth

Health snapshot for a specific action goal.

GoalAck

Immediate acknowledgement returned to the client after a goal is sent.

Enums

ActionLiveness

Liveness classification for an action goal session.

GoalStatus

Current execution status of a goal (polled by the client, updated by the server).