SidechannelEventSchema

const SidechannelEventSchema: ZodReadonly<ZodDiscriminatedUnion<[ZodObject<{ at: ZodNumber; final: ZodBoolean; role: ZodEnum<{ assistant: "assistant"; user: "user"; }>; sessionId: ZodPipe<ZodString, ZodTransform<SessionId, string>>; text: ZodString; type: ZodLiteral<"transcript">; }, $strip>, ZodObject<{ argumentsJson: ZodString; at: ZodNumber; callId: ZodPipe<ZodString, ZodTransform<ToolCallId, string>>; name: ZodString; sessionId: ZodPipe<ZodString, ZodTransform<SessionId, string>>; type: ZodLiteral<"tool_call">; }, $strip>, ZodObject<{ at: ZodNumber; callId: ZodPipe<ZodString, ZodTransform<ToolCallId, string>>; latencyMs: ZodNumber; ok: ZodBoolean; sessionId: ZodPipe<ZodString, ZodTransform<SessionId, string>>; type: ZodLiteral<"tool_result">; }, $strip>, ZodObject<{ at: ZodNumber; label: ZodString; ms: ZodNumber; sessionId: ZodPipe<ZodString, ZodTransform<SessionId, string>>; type: ZodLiteral<"timing">; }, $strip>], "type">>

Defined in: packages/protocol/src/lib/sidechannel-event.ts:28

The transcript/event stream the client emits to the consumer’s backend for observability (metering, recording, debugging). Intentionally carries no audio — only transcripts, tool-call metadata, and timings. This is the exact contract the cloud tier’s metering later rides on, so additive-only.

at on each event is client-clock time and drifts across clients. Any receiver that needs a trustworthy clock for cross-client ordering, metering, or billing must stamp its own receipt time on ingest and use that instead — at is diagnostic only.