claude-code-japanese-guard: Claude Code の応答が英語に切り替わったら、日本語で書き直させる Stop hook

by minorun365 · AI Tool · ★ 56

Last updated: · Indexed by AgentSkillsHub · Auto-synced every 8h

Security audit verdict: SAFE · quality 58/100

None of the 42 rules matched — no credential harvesting, no data exfiltration, no curl-pipe-shell installer. Scanned against 42 published rules built on the SlowMist agent-security taxonomy, refreshed every 8 hours. Full audit →

The quality score combines nine heuristic checks of the repo and its README: completeness, clarity, specificity, examples, structure, agent readiness, step-by-step content, instruction quality and security notes. It rates how well the project explains itself to an agent, not the code.

Quick Facts

Stars56
Forks1
LanguagePython
CategoryAI Tool
LicenseApache-2.0
Quality Score58/100
Last Updated2026-09-30
Created2026-09-25
Platformsclaude-code, python
Est. Tokens~2k

About claude-code-japanese-guard

claude-code-japanese-guard Claude Code の応答が、いつの間にか英語に切り替わるのを止める Stop hook です。 日本語で指示していても、ツールを何度も呼ぶ長い作業のあとや、英語のツール出力を読んだ直後に、途中報告や最終報告が英語で返ってくることがあります。CLAUDE.md に「日本語で応答する」と書いても、この切り替わりは止まりませんでした。そこで、ターンの終わりに本文を機械で検査し、英語だったら日本語で書き直させる hook を作りました。 動き Claude がターンを終えようとすると、Stop hook が最後の応答の本文(hook の入力 )と会話の記録(transcript)を読みます そのターンの最終回答(最後のツール呼び出しより後に Claude が書いた本文)を取り出し、英字と日本語の文字数を数えます...

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How this security grade is produced

Grades come from a rule-based scan built on the SlowMist agent-security taxonomy: 42 published rules, covering credential harvesting, data exfiltration, curl | sh installers and more. It is a first-layer scan, not a manual audit — we say so rather than overstate it.

The scale of the problem is documented independently: Liu et al. (2026), in a study of 31,132 agent skills, report that 26.1% contain security vulnerabilities. Our own full-catalog census is published as a citable open dataset.

Sources & who's responsible:

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