# Sprint 174 - Notifications & Telemetry · 170.B) Telemetry

Active items only. Completed/historic work now resides in docs/implplan/archived_sprints_tasks.md (updated 2025-11-08).

[Notifications & Telemetry] 170.B) Telemetry
Depends on: Sprint 150.A - Orchestrator
Summary: Notifications & Telemetry focus on Telemetry).
Task ID | State | Task description | Owners (Source)
--- | --- | --- | ---
TELEMETRY-OBS-50-001 | TODO | Create `StellaOps.Telemetry.Core` library with structured logging facade, OpenTelemetry configuration helpers, and deterministic bootstrap (service name/version detection, resource attributes). Publish sample usage for web/worker hosts. | Telemetry Core Guild (src/Telemetry/StellaOps.Telemetry.Core/TASKS.md)
TELEMETRY-OBS-50-002 | TODO | Implement context propagation middleware/adapters for HTTP, gRPC, background jobs, and CLI invocations, carrying `trace_id`, `tenant_id`, `actor`, and imposed-rule metadata. Provide test harness covering async resume scenarios. Dependencies: TELEMETRY-OBS-50-001. | Telemetry Core Guild (src/Telemetry/StellaOps.Telemetry.Core/TASKS.md)
TELEMETRY-OBS-51-001 | TODO | Ship metrics helpers for golden signals (histograms, counters, gauges) with exemplar support and cardinality guards. Provide Roslyn analyzer preventing unsanitised labels. Dependencies: TELEMETRY-OBS-50-002. | Telemetry Core Guild, Observability Guild (src/Telemetry/StellaOps.Telemetry.Core/TASKS.md)
TELEMETRY-OBS-51-002 | TODO | Implement redaction/scrubbing filters for secrets/PII enforced at logger sink, configurable per-tenant with TTL, including audit of overrides. Add determinism tests verifying stable field order and timestamp normalization. Dependencies: TELEMETRY-OBS-51-001. | Telemetry Core Guild, Security Guild (src/Telemetry/StellaOps.Telemetry.Core/TASKS.md)
TELEMETRY-OBS-55-001 | TODO | Provide incident mode toggle API that adjusts sampling, enables extended retention tags, and records activation trail for services. Ensure toggle honored by all hosting templates and integrates with Config/FeatureFlag providers. Dependencies: TELEMETRY-OBS-51-002. | Telemetry Core Guild (src/Telemetry/StellaOps.Telemetry.Core/TASKS.md)
TELEMETRY-OBS-56-001 | TODO | Add sealed-mode telemetry helpers (drift metrics, seal/unseal spans, offline exporters) and ensure hosts can disable external exporters when sealed. Dependencies: TELEMETRY-OBS-55-001. | Telemetry Core Guild (src/Telemetry/StellaOps.Telemetry.Core/TASKS.md)