/**
 * module `trace` 唯一出口(编码规范 §9.1)。
 * 全链观测:一条工作流一条 trace,节点/步骤/工具/模型/人卡逐层 span。
 */
export type { SpanHandle, SpanKind, TraceService, TraceSpan } from './contract.ts';
export type { Clock, TraceStore } from './port.ts';
export type { SpanFactory, TraceServiceDeps } from './internal/usecase/trace-service.ts';
export { createTraceService } from './internal/usecase/trace-service.ts';
export { createTraceStore } from './internal/adapter/trace-store.ts';
export { traceSpanTable } from './internal/adapter/trace-schema.ts';