Engine Protocol Reference

API	Description
Value	Application values shared with TEMPEST, independent of wire encoding.
ChannelFields	Optional fields; omitted values leave existing data unchanged.
ChannelChange	A requested change to one channel.
ChannelChanges	One or more requested channel field changes.
ChannelUpsertRequest	Owner-directed batch; execution is synchronous but not atomic.
ChannelRemoveRequest	Owner-directed deletion of one channel.
ChannelQuery	Current channel names and optional field selection; empty selections mean all.
ChannelUpdate	An observed record; local publications fill missing source lineage automatically.
ChannelUpdates	Observed channel records, including repeated timestamped samples.
ChannelQueryResult	Matching current channel records returned by a synchronous query.
ChannelSnapshot	Complete shared selection; an empty selection clears the receiver’s mirror.
EventType	The six supported ARGUS presentation and workflow types.
eventTypeName	Return the lowercase wire name for an event type.
eventTypeFromName	Parse a supported lowercase event type or throw on invalid input.
ArgusEvent	ARGUS event identity, presentation, ownership, channel references, and details.
ArgusQuery	ARGUS event selection by identity, status, type, owner, time range, limit, and additional filters.
ArgusQueryResult	ARGUS events returned by a peer, with result and total counts.
ArgusAction	Action on an ARGUS event.
ArgusActionResult	Event identity and result fields returned by an ARGUS action handler.
LogEntry	Text output from one process stream.
LogQuery	Selects one node, process session, and stream, with optional sequence, text, channel, level, and UTC nanosecond time filters.
LogStream	Identifies one originating node, process session, and named log source.
ArgusBoardSnapshot	Complete current event board.
ChannelHandlers	Install before Peer.start.
ArgusHandlers	Owner-side event commands and incoming event/complete-board telemetry.
LogHandlers	Supported log-history commands and incoming batches of entries.
EngineRequest	Typed synchronous requests carried by the shared Engine contract.
EngineTelemetry	Typed best-effort observations and complete snapshots.
ARGUS_UPDATE_EVENT_STATUS_OPERATION	Engine operation name for owner-directed ARGUS actions.
ARGUS_RESPOND_TO_PROMPT_OPERATION	Engine operation name for owner-directed ARGUS actions.
ARGUS_RELEASE_HOLD_OPERATION	Engine operation name for owner-directed ARGUS actions.
ARGUS_DELETE_EVENT_OPERATION	Engine operation name for owner-directed ARGUS actions.
version	TEMPEST compatibility version supplied by the SDK.
fields	Encode supplied channel fields without inventing omitted values.
operation	Map a typed request to its TEMPEST operation name.
arguments	Map a typed request to its argument object.
request	Validate and parse a TEMPEST operation argument object.
result	Map a typed result to its TEMPEST response object.
channelResult	Parse a channel snapshot response.
argusResult	Parse an ARGUS query response.
actionResult	Parse an ARGUS action response.
topic	Map typed telemetry to its TEMPEST topic.
payload	Map typed telemetry to its application object.
telemetry	Parse a known topic and its application object.
EngineProtocol	Typed application contract over Peer.