| name | performance |
| description | Performance patterns and anti-patterns for ethereum.org covering TTFB, LCP, INP, CLS, bundle size, build memory, and RSC payload. Use when diagnosing a perf regression or reviewing proposed code changes for perf landmines. |
| user-invocable | false |
Performance Knowledge
Knowledge base. No runtime actions; authoring conventions for maintainers below. Read the relevant references/*.md files directly via the Read tool.
Two entry points
- Diagnosing an existing regression →
references/diagnose-table.md (symptom → bucket).
- Reviewing a proposed change before merge →
references/review-checklist.md (diff pattern → rules to load).
Both flows always also load references/anti-patterns.md.
File map
| Topic | File |
|---|
| Symptom → bucket routing | references/diagnose-table.md |
| Diff pattern → rules routing | references/review-checklist.md |
| TTFB, edge caching, CDN | references/edge-caching.md |
| Bundle size, code splitting | references/bundle.md |
| Build OOM, ENOSPC, file tracing | references/build.md |
| RSC payload, HTML size | references/rsc.md |
| INP, main-thread work | references/inp.md |
| LCP, images | references/images.md |
| Cross-cutting anti-patterns | references/anti-patterns.md |
For data-fetching patterns (Trigger.dev tasks, Netlify Blobs, src/lib/data caching, internal /api/* routes, fetcher retries), use the data-layer skill instead.
Conventions for adding rules
- One topic per file; no content duplication across files.
- Cite a PR (
PR #N) when a rule comes from a specific shipped change. Add a SHA only when no PR exists.
- Forward-looking ("do this, avoid that"). Keep entries prescriptive — no postmortems or incident narratives.
- New review check? Add a row to
review-checklist.md AND the matching bucket file. Don't restate the rule inline.
