Command acknowledgements | Voice Platform

Command acknowledgements report that the gateway accepted or dispatched a command. They use the uniform command.<canonical_command>.accepted namespace. Domain events such as recording.became_available, room.deleted, playback.started, and playback.failed report verified outcomes.

All command acknowledgements use the shared CommandAcceptedEvent contract.

Field	Presence	Description
`event`	Required	One canonical `command.*.accepted` value from the catalog below.
`timestamp`	Required	RFC 3339 / ISO 8601 UTC time when the command was accepted and the acknowledgement was emitted.
`operation_uuid`	Conditional	Required when the command response includes an operation. Omitted for call dial, room delete, and room-member volume.
`session_uuid`	Conditional	Target Session for session-scoped commands.
`room_id`	Conditional	Target Room for room-scoped commands. At least one of `session_uuid` or `room_id` is always present; member-volume acknowledgements contain both.

Only information necessary to interpret the accepted command extends this base: dial correlation (direction, type, to, from), recording identity and access (recording_uuid, pull_url), playback inputs (urls, offset_ms), or the requested volume/direction.

If an acknowledgement ever carries an additional date-time with a specific meaning, that field uses <meaning>_at. The event’s own occurrence time always remains timestamp.

Catalog

Command acknowledgement	Target	`operation_uuid`	Extension fields
`command.call.dial.accepted`	`session_uuid`	Omitted	`direction`, `type`, `to`, `from`
`command.playback.pause.accepted`	`session_uuid`	Required	—
`command.playback.resume.accepted`	`session_uuid`	Required	—
`command.playback.seek.accepted`	`session_uuid`	Required	`offset_ms`
`command.playback.restart.accepted`	`session_uuid`	Required	—
`command.recording.start.accepted`	`session_uuid` or `room_id`	Required	`recording_uuid`, `pull_url`, `expires_at`
`command.recording.mask.accepted`	`session_uuid`	Required	`recording_uuid`; optional `pull_url` + `expires_at` pair
`command.recording.unmask.accepted`	`session_uuid`	Required	`recording_uuid`; optional `pull_url` + `expires_at` pair
`command.room.delete.accepted`	`room_id`	Omitted	—
`command.room.member.volume.accepted`	`session_uuid`, `room_id`	Omitted	`volume`, `direction`
`command.room.playback.start.accepted`	`room_id`	Required	`urls`
`command.room.playback.pause.accepted`	`room_id`	Required	—
`command.room.playback.resume.accepted`	`room_id`	Required	—
`command.room.playback.stop.accepted`	`room_id`	Required	—
`command.room.playback.volume.accepted`	`room_id`	Required	`volume`
`command.websocket.pause.accepted`	`session_uuid`	Required	—
`command.websocket.resume.accepted`	`session_uuid`	Required	—
`command.websocket.mute.accepted`	`session_uuid`	Required	—
`command.websocket.unmute.accepted`	`session_uuid`	Required	—
`command.websocket.flush.accepted`	`session_uuid`	Required	—

Category reference pages show concrete examples and the verified domain events that can follow each acknowledgement.