Performance optimization skill. Core Web Vitals via Lighthouse, bundle size analysis, metrics tracking over time. Use when: (1) optimizing frontend performance, (2) analyzing bundle size, (3) tracking metrics regression. Triggers: /perf, 'performance audit', 'core web vitals', 'bundle size'.
Scanned 9/3/2026
Install to Claude Code
npx -y skills add alfredolopez80/multi-agent-ralph-loop --skill perf --agent claude-codeInstalls into .claude/skills of the current project.
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---
# VERSION: 3.0.0
name: perf
description: "Performance optimization skill. Core Web Vitals via Lighthouse, bundle size analysis, metrics tracking over time. Use when: (1) optimizing frontend performance, (2) analyzing bundle size, (3) tracking metrics regression. Triggers: /perf, 'performance audit', 'core web vitals', 'bundle size'."
argument-hint: "<url or path>"
user-invocable: true
---
# Perf — Performance Optimization v3.0
Measure, analyze, and optimize performance.
## Actions
### `/perf audit <url>`
Run Lighthouse via `/browser-test` and extract performance metrics:
- LCP (Largest Contentful Paint) — target < 2.5s
- FID (First Input Delay) — target < 100ms
- CLS (Cumulative Layout Shift) — target < 0.1
- TTFB (Time to First Byte) — target < 800ms
### `/perf bundle <path>`
Analyze JavaScript bundle size:
- Total bundle size
- Per-chunk breakdown
- Tree-shaking opportunities
- Duplicate dependencies
### `/perf track`
Compare current metrics against previous run:
- Store results in `.claude/quality-results/perf/`
- Show delta (improved/regressed)
- Flag regressions as ADVISORY
## Integration
- `/browser-test` provides raw Lighthouse data
- `/gates` Stage 5 (BROWSER) includes perf checks
- `/ship` checklist includes perf audit
## Reference Checklist
See: `docs/reference/performance-checklist.md` (created with this skill)
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