authweave-otel

OpenTelemetry API-only security observability facade for the AuthWeave authentication stack.

authweave-otel depends only on opentelemetry-api and authweave-core. It never installs an SDK, exporter, sampler, propagator, or service.name. Without a configured SDK every span and metric is a no-op, so instrumentation is safe and free by default.

The application owns the TracerProvider/MeterProvider, sampling, export, and retention. Construct AuthWeaveTelemetry with global or explicit providers and pass it into your AuthWeave adapter configuration. LitestarAuth creates only INTERNAL child security spans inside the server span produced by normal ASGI instrumentation; it never creates a second HTTP span:

from authweave_otel import AuthWeaveTelemetry
from litestar_auth import LitestarAuthConfig

telemetry = AuthWeaveTelemetry()
config = LitestarAuthConfig(
    # normal required configuration omitted
    observer=telemetry,
)

The same observer can be passed to the HTTP-signature/webhook verifier and webhook sender constructors. verify(..., links=(TraceCorrelation(...),)) and send(..., links=...) attach retry/async causal links without accepting trace context as identity. Direct operation_span() and metric methods remain available for application-owned operations.

Privacy and abuse resistance

Attribute keys are allowlisted (authweave.* catalog only).
Values are truncated to 64 characters and redacted when they match secret canaries (tokens, cookies, PEM headers, payment fragments).
Unknown reason codes collapse to _OTHER so hostile input cannot grow label cardinality.
Baggage extraction/forwarding defaults to off (DEFAULT_TRACE_CONTEXT_POLICY); remote parents are never trusted identity.
Telemetry never participates in authentication, authorization, replay, or idempotency decisions. Collector/exporter outage must not change auth results.
Workload SecurityEvent values receive the active trace_id/span_id for lookup only. The mandatory event callback remains the durable audit channel.

Catalog and reference stack

Span names, metric names, units, and attribute keys are a versioned catalog. See authweave_otel.catalog; renames and cardinality growth are breaking changes.

A non-production Collector/Prometheus/Tempo/Grafana stack lives at docker/reference/observability/. Run sh docker/reference/observability/verify.sh for the synthetic smoke test and golden Prometheus name checks after the pinned OTel→Prometheus translation.

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