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observability

Use when adding telemetry, composing an observability surface, reviewing alerts, shipping a production feature, or diagnosing a production issue. Not for live failures, profiling, or launch runbooks.

.devin/skills/observability/SKILL.md

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# Observability

## Contract

| Field | Bound contract |
|---|---|
| Trigger | Adding telemetry, composing the smallest observability surface the system will keep, reviewing alerting rules, shipping a production feature, or diagnosing an opaque production issue. |
| Authority | Reversible local: writes only instrumentation code and local telemetry configuration in the working tree; rollback is discarding the edits. No remote mutation. |
| Side effect | Adds instrumentation: structured log calls, metric instruments, tracer setup, alert definitions, and dashboard panels to the target code. |
| Done | Structured logs carry a correlation ID, RED metrics exist with bounded labels, one request traces end-to-end with minimum spans and no broken spans, every dashboard panel maps to a failure mode, no duplicate or unowned surface remains, the surface compiles, loads, and emits locally, symptom-based alerts are defined, and local telemetry emission is verified. |

## Inputs

Required: the target source files or endpoints to instrument, and their runtime (language and framework).