flow

Defined in hooks/hooks.json

{
  "SessionStart": [
    {
      "hooks": [
        {
          "type": "command",
          "async": false,
          "command": "\"${CLAUDE_PLUGIN_ROOT}/hooks/run-hook.cmd\" session-start"
        }
      ],
      "matcher": "startup|clear|compact"
    }
  ]
}

"Executes Windows batch script run-hook.cmd session-start on SessionStart events matching startup, resume, clear, or compact. Command type hook, no bash or file writes."