thkt/skills/root-cause-analysis
skills/root-cause-analysis/SKILL.md
--- name: root-cause-analysis description: 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. allowed-tools: [Read, Grep, Glob, Task] context: fork user-invocable: false --- # Root Cause Analysis - 5 Whys ## Principle Fix the root cause, not the symptom. Symptom fixes add complexity; root-cause fixes prevent recurrence. ## 5 Whys Process Ask "why" five times, descending through abstraction levels. | Step | Level | | ----
$ install --global
skillsauthnpx skillsauth add thkt/claude-config skills/root-cause-analysisInstall 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 22, 2026, 7:21 AM177.6s3 files scanned
SKILL.md
- name:
- root-cause-analysis
- description:
- 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.
- allowed-tools:
- [Read, Grep, Glob, Task]
- context:
- fork
- user-invocable:
- false
Root Cause Analysis - 5 Whys
Principle
Fix the root cause, not the symptom. Symptom fixes add complexity; root-cause fixes prevent recurrence.
5 Whys Process
Ask "why" five times, descending through abstraction levels.
| Step | Level | | ---- | ------------------------ | | 1 | Observable fact | | 2 | Implementation detail | | 3 | Design decision | | 4 | Architectural constraint | | 5 | Root cause |
Tips
| Tip | Description | | ---------------- | -------------------------------- | | Stay factual | Evidence, not assumptions | | Don't stop early | First "why" is rarely root cause | | Don't go deep | Stop when actionable | | Validate | "Because [5], therefore [4]..." | | Verify fix | "Will this prevent the problem?" |
References
| Topic | File |
| -------------------- | ---------------------------------------------------- |
| Worked examples | ${CLAUDE_SKILL_DIR}/references/five-whys.md |
| Symptom → Root Cause | ${CLAUDE_SKILL_DIR}/references/symptom-patterns.md |
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