engineering

Telemetry-First Observability: Events Before Dashboards

Dashboards built without a telemetry contract lie. Telemetry built without a consumer is overhead. Here's how Prismatic wires :telemetry events into a coherent observability story across 94 umbrella apps.

Apr 09, 2026 ·7 min

engineering

Telemetry to Prometheus: The Pipeline You Stop Writing Once You Get It Right

`:telemetry` events → `Telemetry.Metrics` definitions → Prometheus exporter → Grafana. Four steps, three libraries, one rule: the metrics list is the API.

Apr 09, 2026 ·6 min

engineering

PlatformTruth: Dynamic Statistics as the Single Source of Truth

How PlatformTruth eliminates hardcoded metrics through filesystem scanning, ETS caching, claim validation pipelines, and dynamic health scoring.

Mar 20, 2026 ·9 min

engineering

Telemetry-Driven Development: Observability from Day One

How to build observable Elixir systems using :telemetry from the start, covering event design, span patterns, custom metrics, and the OTEL doctrine pillar.

Mar 14, 2026 ·10 min