untrusted file (PDF text / AI チャット履歴 / GitHub issue / 他人 wiki 等) を Claude が Read する前に prompt injection 細工を機械検査する skill + hook。BIDI / Unicode TAG / VS / homoglyph / NFKD inject / base64 / window combo / TR39 confusables を Risk-code (R0/R1/R2) で判定し、R2 file の Read tool 呼び出しを PreToolUse hook (matcher: Read|Edit|NotebookEdit) で block、R1 は attestation (人間による確認証明) 強制。patterns.json manifest は age (X25519) + minisign (Ed25519) で同梱。
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/plugin marketplace add arkatom/claude-plugins
Install plugins
/plugin
Run these commands in Claude Code to add this plugin to your environment. The marketplace must be added before you can install its plugins.
Plugin Source
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GitHub Repository
arkatom/claude-plugins
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arkatom-plugins
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Author
@arkatom
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