Gemini CLI

Support: detection and feedback.

Install

Run OpenFiles: Install Agent Hooks… and pick Gemini CLI. OpenFiles adds this to .gemini/settings.json:

{
  "hooks": {
    "AfterTool": [
      {
        "matcher": "write_file|replace",
        "hooks": [
          {
            "type": "command",
            "name": "OpenFiles",
            "command": "node \"/Users/you/.openfiles/hook.js\" --agent gemini --tag openfiles-hook",
            "timeout": 15000
          }
        ]
      }
    ]
  }
}

Gemini CLI timeouts are in milliseconds. Gemini expects a hook’s stdout to be pure JSON, and OpenFiles prints either one JSON object or nothing.

What Gemini sees

hookSpecificOutput.additionalContext is appended to the tool result.

Reference: Gemini CLI hooks.