Nobody Alerts on Silence: Wiring Sentry Into an LLM Pipeline
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Integrating Sentry observability into LLM pipelines, highly actionable for AI/ML monitoring.
An open-source .NET LLM pipeline (TextStack) had zero production observability because its OTLP exporter pointed at a profile-gated dashboard that never runs in production, meaning every span was fired into a closed socket. The fix wires Sentry into the API and background worker, adding route-reason spans (why a provider was chosen), throttled alerts for expensive tasks landing on the default provider, a startup readiness probe with circuit breaker for dead providers, and an environment-tag fix to prevent laptop traffic from masquerading as production. The integration immediately caught two latent bugs: EF Core SQL leaking into breadcrumb messages past a green-tested scrubber, and a race condition on reading-progress upserts causing duplicate key violations that lost users' place in books.