feat(otel): optional OpenTelemetry tracing (ADR-0025)#2
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…tel subpath (ADR-0025) Mirrors the Go/Python reference: a new src/otel.ts (reached only via the @babelqueue/core/otel subpath, so importing the core stays dependency-free) emitting produce/consume spans correlated across hops via trace_id<->32-hex OTel TraceID. wrapHandler (consumer span) + publish (producer-span wrapper around a send callback). @opentelemetry/api is an optional peer dependency. Envelope untouched (GR-1); opt-in.
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The Node mirror of
babelqueue-go/otel/babelqueue.otel(ADR-0025): optional OpenTelemetry tracing exposed via the@babelqueue/core/otelsubpath, with@opentelemetry/apias an optional peer dependency — so importing@babelqueue/coreitself stays dependency-free (GR-7).What
traceIdOf/uuidOf—trace_id(a UUID) ↔ 32-hex OTel trace id (otherwise SHA-256). The already-propagatedtrace_idbecomes the shared OTel trace across every hop/SDK — no envelope change (GR-1).wrapHandler(tracer, handler)— a CONSUMER spanprocess <urn>in thetrace_id-derived trace, with messaging-semconv attributes + error recording. The handler receives the fullEnvelopeas before.publish(tracer, urn, data, send)— a PRODUCER spanpublish <urn>that builds the envelope with the active trace's id astrace_idand runs the user'ssend(transport write) within the span.Tests / CI
otel.tsat 100% lines/functions; typecheck + eslint clean; the existing c8 gate (lines/functions ≥90, branches ≥85) stays green (89% branches overall).tsupbuilds the./otelentry (dual ESM+CJS + types).Honest limit
One correlated trace per
trace_id; exact cross-hop span parent-child (W3Ctraceparentas a transport header) is the documented follow-up.🤖 Generated with Claude Code