thkt/optimizing-performance
skills/optimizing-performance/SKILL.md
Frontend performance optimization. Use when: performance, Web Vitals, LCP, FID, CLS, パフォーマンス最適化, 速度改善, bundle size.
$ install --global
skillsauthnpx skillsauth add thkt/dotclaude optimizing-performanceInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
3
Scanners Passed
9
Scanners in report
Clean
TrivyContainer and dependency vulnerability scanner
95%
Clean
SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
Skipped
Socket.devSupply chain security analysis
50%
Skipped
VirusTotalMulti-engine malware detection
50%
Skipped
CrowdStrikeAdvanced threat intelligence
50%
Skipped
OSV-ScannerOpen Source Vulnerability database check
50%
Skipped
OWASP Dep-Check
50%
Last scanned: Apr 20, 2026, 9:28 AM7.2s6 files scanned
SKILL.md
- name:
- optimizing-performance
- description:
- >
- Frontend performance optimization. Use when:
- performance, Web Vitals, LCP,
- allowed-tools:
- [Read, Grep, Glob, Task, Bash(agent-browser:*), mcp__mdn__*]
- agent:
- performance-reviewer
- context:
- fork
- user-invocable:
- false
Performance Optimization
Core Web Vitals
| Metric | Target | Measure | | ------ | ------ | ------------------------ | | LCP | <2.5s | Largest Contentful Paint | | FID | <100ms | First Input Delay | | CLS | <0.1 | Cumulative Layout Shift |
Workflow
- Measure (Lighthouse/DevTools)
- Identify bottleneck
- One change at a time
- Re-measure
References
| Topic | File |
| ------ | ------------------------------------------------------- |
| Vitals | ${CLAUDE_SKILL_DIR}/references/web-vitals.md |
| React | ${CLAUDE_SKILL_DIR}/references/react-optimization.md |
| Bundle | ${CLAUDE_SKILL_DIR}/references/bundle-optimization.md |
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