Context Propagation

This file tracks compliance for OpenTelemetry context propagation requirements in this repository.

Scope

Area	Requirement	Status	Evidence	Notes
Baggage propagator	Inject/Extract operations for carrier propagation	Compliant	W3CBaggagePropagator.scala, W3CBaggagePropagator.scala, W3CBaggagePropagatorSuite.scala	SDK baggage propagator implements both extraction and injection paths with tests.
Trace propagator	Inject/Extract operations for carrier propagation	Compliant	W3CTraceContextPropagator.scala, W3CTraceContextPropagator.scala, W3CTraceContextPropagatorSuite.scala	W3C tracecontext propagator implements extraction and injection with tests.
Composite propagator	Ability to compose multiple propagators	Compliant	ContextPropagatorsAutoConfigure.scala, OpenTelemetrySdk.scala, OpenTelemetrySdk.scala	Uses `ContextPropagators.of(...)` and wires composed propagators into SDK.
Global/default propagators	Default to pre-configured propagators and allow override	Partial	ContextPropagatorsAutoConfigure.scala, ContextPropagatorsAutoConfigure.scala, ContextPropagatorsAutoConfigure.scala	`tracecontext,baggage` default and `OTEL_PROPAGATORS` override are supported; no process-wide global get/set API is exposed.

Area	Requirement	Status	Evidence	Notes
Env var context carrier	Support context propagation through environment variable carriers	Not Implemented	ContextPropagatorsAutoConfigure.scala, ContextPropagatorsAutoConfigure.scala, propagation	SDK ships HTTP/header-style propagators; no `EnvironmentContextPropagator` or env getter/setter implementation is present.
Standard env mapping	W3C env variable mapping (`TRACEPARENT`, `TRACESTATE`, `BAGGAGE`)	Not Implemented	ContextPropagatorsAutoConfigure.scala, ContextPropagatorsAutoConfigure.scala	No env-carrier translation layer or config for env variable key mapping exists.