ObservabilityTelemetry cardinality

observability/require-stable-telemetry-names

Telemetry names should be stable literals or visibly bounded templates rather than dynamic values that create unbounded cardinality.

metricsspanscardinality

01 Examples

TypeScript

metrics.increment(`request.${userId}`);

Finding

Require stable event, span, and metric names.

02 Enable it

Setup

Install the package, register its plugin factory, then enable the rule.

pnpm add -D @scruple/observability

In scruple.config.ts, register the factory under the observability namespace used by the rule ID.

import { observability } from "@scruple/observability";

plugins: {
  "observability": observability(),
},

"observability/require-stable-telemetry-names": "warn"