Adding Metrics Agent Skill
Add new Prometheus metrics to the Cloudflare exporter. Use when adding metrics, implementing new GraphQL/REST queries, or extending metric coverage. Covers the full workflow from schema discovery through client implementation and README updates.
Install
one command, takes just this skill from the repositorynpx skills add https://github.com/cloudflare/cloudflare-prometheus-exporter --skill adding-metricsWhat comes with it
15 961 bytes besides the instructionThe instruction itself
6 sections, as written by the authorAdding Metrics
Guided workflow for adding new Prometheus metrics to the Cloudflare Prometheus Exporter. Derived from patterns in PRs #10, #13, #14, #15, and opencode session 1770403408223-happy-garden.
Decision Tree
What kind of metric are you adding?
|
+-- Uses Cloudflare GraphQL API?
| |
| +-- Scoped to a single account (no zones)?
| | -> Account-level GraphQL
| | -> See workflow.md, Step A
| |
| +-- Scoped to zones (needs zoneTag_in)?
| -> Zone-level GraphQL
| -> See workflow.md, Step B
|
+-- Uses Cloudflare REST API?
-> REST API (zone-scoped DO)
-> See workflow.md, Step C
Quick Reference: Files to Modify
| Step | File | Change |
|------|------|--------|
| 1 | src/cloudflare/gql/queries.ts | Add graphql() tagged template (skip for REST) |
| 2 | src/cloudflare/queries.ts | Add to MetricQueryNameSchema enum + category arrays |
| 3 | src/cloudflare/client.ts | Import query, add switch case, implement handler |
| 4 | src/durable-objects/MetricExporter.ts | Only if special guardrails needed (e.g. allowlists) |
| 5 | README.md | Add metric docs + update architecture diagram counts |
Key Conventions
- Metric names:
cloudflare_<scope>_<thing>_<unit>--_totalfor counters,_secondsfor durations - Label keys:
snake_casealways. Normalize accounts vianormalizeAccountName(), zones viafindZoneName() - Counter vs Gauge: counters for window totals (DO accumulates); gauges for snapshots/rates/ratios
- Null safety:
noUncheckedIndexedAccessis on -- null-coalesce everything:dims?.field ?? "" - Empty filter: Always
return [...metrics].filter(m => m.values.length > 0) - Exhaustive switch: Both dispatch methods use
const _exhaustive: never = query-- TS errors if case missing
Reading Order
| Task | Files |
|------|-------|
| Add a metric (full workflow) | workflow.md |
| Copy/paste code templates | patterns.md |
| Avoid known pitfalls | gotchas.md |
In This Reference
| File | Purpose |
|------|---------|
| workflow.md | Step-by-step checklist per metric category |
| patterns.md | Code templates for queries, handlers, and MetricDefinitions |
| gotchas.md | Pitfalls from real PRs and code reviews |
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How to use it
Take cloudflare/adding-metrics from the repository into ~/.claude/skills for personal
use, or into .claude/skills inside a project.
The agent identifies a skill by the name field in its header. Two skills with the
same name cannot sit side by side — one of them will be ignored.