Telemetry

Execute all three phases in order.

Phase 1 — Trace Wrap

Wrap the critical-path function in a trace span:

OpenTelemetry:

tracer.startActiveSpan('operation.name', (span) => {
  // ... function body
  span.end();
});

Sentry:

const transaction = Sentry.startTransaction({ name: 'operation.name' });
// ... function body
transaction.finish();

Datadog:

tracer.trace('operation.name', () => {
  // ... function body
});

Phase 2 — Attribute Injection

Inside the span, attach:

• Execution time (start and stop timer)
• Query tags: user_id, tenant_id, endpoint
• Input and output payload sizes in bytes

Phase 3 — Alert Rule

Propose an alert rule with all four fields specified:

| Field | Value | |---|---| | Metric | (e.g. trace.operation.duration) | | Threshold | (e.g. > 200ms) | | Evaluation window | (e.g. last 5 minutes) | | Severity | (e.g. P2 / warning) |

Examples:

• Datadog: avg(last_5m):avg:trace.operation.duration{env:prod} > 0.200 → P2
• Prometheus: histogram_quantile(0.99, rate(http_request_duration_seconds_bucket[5m])) > 0.2 → warning

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: v0idOS
• Source: v0idOS/performance-deity
• License: MIT
• Homepage: https://v0idos.github.io/performance-deity/

Install and usage instructions live in the source repository linked above.