Frontend performance optimization with data-driven approach. Triggers: パフォーマンス, 遅い, 最適化, レンダリング, バンドルサイズ, Web Vitals, LCP, FID, CLS, 再レンダリング, メモ化, useMemo, useCallback, React.memo, 重い, 高速化, lazy loading, code splitting
/plugin marketplace add thkt/claude-config/plugin install complete-workflow-system@thkt-development-workflowsThis skill is limited to using the following tools:
EVALUATIONS.mdreferences/bundle-optimization.mdreferences/react-optimization.mdreferences/web-vitals.mdscripts/validate.shData-driven frontend optimization. "Measure before optimizing" - Donald Knuth
| Section | File | Focus | Load When |
|---|---|---|---|
| Web Vitals | references/web-vitals.md | LCP, FID, CLS | Loading speed, layout shifts |
| React | references/react-optimization.md | memo, useMemo, useCallback | Re-renders |
| Bundle | references/bundle-optimization.md | Code splitting, tree shaking | Bundle size |
| Metric | Target | What It Measures |
|---|---|---|
| LCP | <2.5s | Largest Contentful Paint |
| FID | <100ms | First Input Delay |
| CLS | <0.1 | Cumulative Layout Shift |
- [ ] 1. 現状測定（Lighthouse/DevTools）
- [ ] 2. ボトルネック特定（Network/Performance tab）
- [ ] 3. 優先順位付け（Impact vs Effort）
- [ ] 4. 改善実施（one change at a time）
- [ ] 5. 再測定・比較
| Reference | Purpose |
|---|---|
| @./references/web-vitals.md | LCP, FID, CLS optimization |
| @./references/react-optimization.md | memo, useMemo, useCallback |
| @./references/bundle-optimization.md | Code splitting, tree shaking |
enhancing-progressively - CSS-first progressive enhancementapplying-code-principles - SOLID, DRY, YAGNI principlesperformance-reviewer - Performance code review agentThis skill should be used when the user asks to "create a slash command", "add a command", "write a custom command", "define command arguments", "use command frontmatter", "organize commands", "create command with file references", "interactive command", "use AskUserQuestion in command", or needs guidance on slash command structure, YAML frontmatter fields, dynamic arguments, bash execution in commands, user interaction patterns, or command development best practices for Claude Code.
This skill should be used when the user asks to "create an agent", "add an agent", "write a subagent", "agent frontmatter", "when to use description", "agent examples", "agent tools", "agent colors", "autonomous agent", or needs guidance on agent structure, system prompts, triggering conditions, or agent development best practices for Claude Code plugins.
This skill should be used when the user asks to "create a hook", "add a PreToolUse/PostToolUse/Stop hook", "validate tool use", "implement prompt-based hooks", "use ${CLAUDE_PLUGIN_ROOT}", "set up event-driven automation", "block dangerous commands", or mentions hook events (PreToolUse, PostToolUse, Stop, SubagentStop, SessionStart, SessionEnd, UserPromptSubmit, PreCompact, Notification). Provides comprehensive guidance for creating and implementing Claude Code plugin hooks with focus on advanced prompt-based hooks API.