Root cause analysis with 5 Whys. Use when: root cause, 5 Whys, なぜなぜ分析, 根本原因, 原因分析, symptom fix, 対症療法.
From shipnpx claudepluginhub thkt/dotclaude --plugin toolkitThis skill is limited to using the following tools:
references/five-whys.mdreferences/symptom-patterns.mdProvides UI/UX resources: 50+ styles, color palettes, font pairings, guidelines, charts for web/mobile across React, Next.js, Vue, Svelte, Tailwind, React Native, Flutter. Aids planning, building, reviewing interfaces.
Fetches up-to-date documentation from Context7 for libraries and frameworks like React, Next.js, Prisma. Use for setup questions, API references, and code examples.
Calculates TAM/SAM/SOM using top-down, bottom-up, and value theory methodologies for market sizing, revenue estimation, and startup validation.
| Type | Example | Result |
|---|---|---|
| Symptom Fix | setTimeout to wait for DOM | Breaks later |
| Root Cause | Use React ref properly | Permanent fix |
| Symptom Fix | Add flag for double-submit | Complexity ↑ |
| Root Cause | Disable button on submit | Simple fix |
| Step | Question | Reveals |
|---|---|---|
| 1 | Why does this occur? | Observable fact |
| 2 | Why does that happen? | Implementation detail |
| 3 | Why is that the case? | Design decision |
| 4 | Why does that exist? | Architectural constraint |
| 5 | Why was it designed this way? | Root cause |
| Topic | File |
|---|---|
| 5 Whys | ${CLAUDE_SKILL_DIR}/references/five-whys.md |
| Patterns | ${CLAUDE_SKILL_DIR}/references/symptom-patterns.md |