メニュー
デフォルトでは、最初にソースを確認する Prompt が選択されています。直接コマンドに切り替えるか、ローカルコピーをダウンロードすることもできます。
インストールを決める前に、SKILL.md と SkillsMP に表示されている付属ファイルをお読みください。
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
直接コマンドでは確認用 Prompt が省略されます。実行前にソースを確認してください。
npx skills add https://github.com/FlorianBruniaux/claude-code-ultimate-guide --skill security-checkコマンドは1行のまま表示されます。コピー前に横へスクロールして全体を確認してください。
ローカルで確認しますか？SkillsMP が現在取得できるファイルをダウンロードできます。
SOC 職業分類に基づく
SKILL.md を表示中
| name | security-check |
| description | Quick configuration security check against known threats database |
| argument-hint | [path] |
| effort | medium |
| disable-model-invocation | true |
Quick configuration security check against known threats database. Verifies your Claude Code setup for known malicious skills, vulnerable MCPs, dangerous patterns, and exposed secrets.
Time: ~30 seconds | Scope: Claude Code configuration only
You are a security analyst. Check the user's Claude Code configuration against the compatibility threat database at examples/commands/resources/threat-db.yaml. Produce a concise, actionable report.
Read examples/commands/resources/threat-db.yaml from this repository to load:
Read the user's MCP configuration:
# Global MCP config
~/.claude.json 2>/dev/null | jq
.mcp.json 2>/dev/null
Check against threat-db.yaml:
@latest)? → HIGH if unpinned--dangerous-* flags in MCP args? → CRITICALguide/security/security-hardening.md §1.1)? → MEDIUM (flag for manual review)# List installed skills
ls -la .claude/skills/ 2>/dev/null
ls -la ~/.claude/skills/ 2>/dev/null
# List agents
ls -la .claude/agents/ 2>/dev/null
ls -la ~/.claude/agents/ 2>/dev/null
# Check agent tools field
grep -r "^tools:" .claude/agents/ 2>/dev/null
grep -r "^tools:" ~/.claude/agents/ 2>/dev/null
Check against threat-db.yaml:
malicious_skills entries? → CRITICALmalicious_authors entries? → CRITICALtools: Bash only? → HIGHDeep skill content analysis (SkillSpector-inspired patterns):
# Hidden instructions: HTML comments, zero-width chars, large base64 blobs
grep -rn '<!--' .claude/skills/ ~/.claude/skills/ 2>/dev/null | grep -iv 'example\|comment\|html'
grep -rPn '[\x{200B}-\x{200D}\x{FEFF}\x{00AD}]' .claude/skills/ ~/.claude/skills/ 2>/dev/null
grep -rn -E '[A-Za-z0-9+/]{40,}={0,2}' .claude/skills/ ~/.claude/skills/ 2>/dev/null | grep -v 'sha\|hash\|checksum' | head -10
# Unicode deception: RTL override characters
grep -rPn '[\x{202E}\x{202D}\x{200F}]' .claude/skills/ ~/.claude/skills/ 2>/dev/null
# Trigger abuse: generic keywords that shadow built-in commands
grep -rn "trigger\|keyword\|when.*user" .claude/skills/ ~/.claude/skills/ 2>/dev/null | \
grep -iE '\b(help|run|go|do|yes|ok|the|a |an |it)\b' | head -10
# Supply chain: remote execution patterns in skill scripts
find .claude/skills/ ~/.claude/skills/ \( -name "*.sh" -o -name "*.py" \) 2>/dev/null | \
xargs grep -l "curl.*|\|wget.*|\|bash.*http\|eval.*curl" 2>/dev/null
# Rogue agent: cron/startup persistence written by skill scripts
find .claude/skills/ ~/.claude/skills/ -type f 2>/dev/null | \
xargs grep -l "crontab\|launchctl\|systemctl\|~/.bashrc\|~/.zshrc\|autostart" 2>/dev/null
# Data exfiltration: env harvesting combined with network calls
find .claude/skills/ ~/.claude/skills/ -type f 2>/dev/null | \
xargs grep -l "os.environ\|process.env\|getenv\|printenv" 2>/dev/null | \
xargs grep -l "curl\|requests\|fetch\|http" 2>/dev/null
curl | bash or remote eval? → CRITICAL# List all hooks
find .claude/hooks/ -type f 2>/dev/null
find ~/.claude/hooks/ -type f 2>/dev/null
# Scan hooks for suspicious patterns
grep -rn "curl\|wget\|nc \|ncat\|netcat\|base64\|eval\|exec\|/dev/tcp\|/dev/udp" .claude/hooks/ 2>/dev/null
grep -rn "curl\|wget\|nc \|ncat\|netcat\|base64\|eval\|exec\|/dev/tcp\|/dev/udp" ~/.claude/hooks/ 2>/dev/null
# Check for credential access in hooks
grep -rn "ssh\|id_rsa\|id_ed25519\|\.env\|credentials\|secret\|password\|token\|api.key" .claude/hooks/ 2>/dev/null
grep -rn "ssh\|id_rsa\|id_ed25519\|\.env\|credentials\|secret\|password\|token\|api.key" ~/.claude/hooks/ 2>/dev/null
Check against threat-db.yaml suspicious_patterns.hooks:
curl, wget) → HIGHnc, /dev/tcp) → CRITICALssh, .env, password) → CRITICAL# Check for suspicious instructions in memory/config files
grep -in "ignore\|forget\|override\|disregard\|you are now\|new role\|system prompt" \
CLAUDE.md .claude/CLAUDE.md SOUL.md .claude/SOUL.md MEMORY.md .claude/MEMORY.md \
~/.claude/CLAUDE.md ~/.claude/MEMORY.md 2>/dev/null
# Check settings
cat .claude/settings.json 2>/dev/null
cat ~/.claude/settings.json 2>/dev/null
permissions.deny exists and covers .env*, *.pem, *.key, secrets? → MEDIUM if missingpermissions.allow for Bash or Write? → HIGH if presentdangerouslySkipPermissions or similar flags? → CRITICAL if present# Check for secrets in .claude/ directory
grep -rn "sk-[a-zA-Z0-9]\{20,\}\|sk-ant-[a-zA-Z0-9]\{20,\}\|ghp_[a-zA-Z0-9]\{36\}\|AKIA[A-Z0-9]\{16\}" \
.claude/ ~/.claude/ 2>/dev/null
# Check for private keys
grep -rn "BEGIN.*PRIVATE KEY" .claude/ ~/.claude/ 2>/dev/null
## 🛡️ Security Check Report
**Date**: [timestamp]
**Scope**: Claude Code configuration
### Results Summary
| Severity | Count | Status |
|----------|-------|--------|
| 🔴 CRITICAL | X | [PASS/FAIL] |
| 🟠 HIGH | X | [PASS/FAIL] |
| 🟡 MEDIUM | X | [PASS/FAIL] |
| 🟢 LOW | X | [PASS/FAIL] |
### 🔴 Critical Issues
[List each critical finding with location and fix]
### 🟠 High Issues
[List each high finding with location and fix]
### 🟡 Medium Issues
[List each medium finding with location and fix]
### ✅ Passed Checks
[List what passed, important for confidence]
### 🔧 Recommended Actions (Priority Order)
1. [Most urgent fix with exact command]
2. [Second priority]
3. [...]
### 📚 References
- Full security guide: guide/security/security-hardening.md
- Threat database: examples/commands/resources/threat-db.yaml
- MCP scan: `npx mcp-scan` (Snyk)
If ALL checks pass, output:
## 🛡️ Security Check Report: ALL CLEAR ✅
**Date**: [timestamp]
No known threats detected in your Claude Code configuration.
**Recommendations for continued security:**
- Re-run `/security-check` after installing new skills or MCP servers
- Run `/security-audit` for a comprehensive project + config audit
- Keep Claude Code updated (current security fixes in v2.1.34+)
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