casper

Defined in hooks/hooks.json

{
  "PreToolUse": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "LC_ALL=C ${CLAUDE_PLUGIN_ROOT}/scripts/validate-bash.sh",
          "timeout": 5
        }
      ],
      "matcher": "Bash"
    }
  ],
  "SessionStart": [
    {
      "hooks": [
        {
          "type": "command",
          "command": "LC_ALL=C ${CLAUDE_PLUGIN_ROOT}/scripts/load-env.sh"
        }
      ],
      "matcher": "startup"
    }
  ]
}

"Runs bootstrap.sh on SessionStart for initialization and guardrails.sh on PreToolUse for Bash tools to enforce safety. Executes bash commands, no file writes."