@lesto/observability

Lesto's in-house distributed-tracing core — OpenTelemetry-shaped, with no OpenTelemetry dependency.

Part of Lesto, the batteries-included, agent-native fullstack framework.

bun add @lesto/observability

import { Tracer, InMemoryExporter } from "@lesto/observability";

const tracer = new Tracer({ exporter: new InMemoryExporter() });

const root = tracer.startSpan("handle_request");
const child = tracer.startSpan("query_db", { parent: root });
child.setAttribute("rows", 12).setStatus("ok").end();
root.end();

await tracer.withSpan("charge_card", async (span) => {
  span.setAttribute("amount_cents", 4200);
  return charge();
});

OpenTelemetry-shaped, with no OpenTelemetry dependency. Swap InMemoryExporter for OtlpHttpExporter and flush() ships spans to a real collector over OTLP/HTTP. v1 is traces only — no metrics or logs pipeline (deliberate scope, not a gap).

Docs · Agent-readable docs