Add-ons · HookEveryday codingTesting & SecurityReviewed

security/dangerous-command-blocker

Blocks catastrophic shell commands such as rm -rf / and mkfs, and protects the .claude, .git and node_modules paths.

Kind: Hook
Works with: Claude Code
Languages: TypeScript / JavaScript, Shell
Source: Claude Code Templates @ 72e5f237f64d
Path: cli-tool/components/hooks/security/dangerous-command-blocker.json
License: MIT
Jobs: Guardrails

InstallInstall it by hand, following the source.

{
  "description": "Advanced protection against dangerous shell commands with multi-level security. Blocks catastrophic operations (rm -rf /, dd, mkfs), protects critical paths (.claude/, .git/, node_modules/), and warns about suspicious patterns. Features: catastrophic command blocking, critical path protection, smart pattern detection, and detailed safety messages.",
  "supportingFiles": [
    {
      "source": "dangerous-command-blocker.py",
      "destination": ".claude/hooks/dangerous-command-blocker.py",
      "executable": true
    }
  ],
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "Bash",
        "hooks": [
          {
            "type": "command",
            "command": "python3 .claude/hooks/dangerous-command-blocker.py"
          }
        ]
      }
    ]
  }
}