/** Initial, intentionally narrow subsystem vocabulary for local Locus tracing. */
export type LiveTraceSubsystem = "client" | "transport" | "locus" | "livemap";
export type LiveTraceStatus = "event" | "begin" | "success" | "failure" | "skip";
/** Allowlisted scalar summaries only; trace details never carry domain objects. */
export type LiveTraceDetailValue = string | number | boolean | null | readonly (string | number | boolean | null)[];
export type LiveTraceDetails = Readonly<Record<string, LiveTraceDetailValue>>;
/** One immutable observational event. Sequence is authoritative within a trace. */
export type LiveTraceEvent = Readonly<{
    traceId: string;
    sequence: number;
    subsystem: LiveTraceSubsystem;
    phase: string;
    status: LiveTraceStatus;
    timestamp: number;
    spanId?: string;
    parentSpanId?: string;
    durationMs?: number;
    details?: LiveTraceDetails;
}>;
/** Synchronous by design; Locus safely isolates every sink invocation. */
export type LiveTraceSink = Readonly<{
    emit: (event: LiveTraceEvent) => void;
}>;
export type LiveTraceCollectorOptions = Readonly<{
    capacity: number;
}>;
export type LiveTraceCollector = LiveTraceSink & Readonly<{
    capacity: number;
    events: () => readonly LiveTraceEvent[];
    clear: () => void;
}>;
export type LiveTraceConsoleWriter = (line: string) => void;
export type LiveTraceConsoleSinkOptions = Readonly<{
    write?: LiveTraceConsoleWriter;
}>;
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