| name | gemini |
| description | This skill should be used when the user asks to "use Gemini", "get a Gemini review", "delegate to Gemini CLI", or "run Gemini headless" for a second opinion. |
Gemini Headless Delegation
Run Gemini CLI in headless mode to perform tasks in this codebase.
Usage
Run with a direct prompt or stdin:
gemini --prompt "task description"
echo "Explain this code" | gemini
If the host tool supports background execution, use it for long-running calls and poll for output.
Output Formats
text (default) for human-readable output.json for structured output with response, stats, and optional error.stream-json for JSONL events: init, message, tool_use, tool_result, error, result.
Flags
--prompt, -p - Headless prompt.--output-format - text, json, stream-json.--model, -m - Specify model (e.g., gemini-2.5-flash).--debug, -d - Enable debug mode.--include-directories - Add directories to context (comma-separated).--yolo, -y - Auto-approve all actions.--approval-mode - Set approval mode (e.g., auto_edit).
When to Use Each Approach
| Task | Approach |
|---|
| Code review | Default headless prompt |
| Broad codebase question | Include paths in prompt or use --include-directories |
| Specific file analysis | Pipe file contents and include the file path in prompt |
| Structured output | --output-format json with jq -r '.response' |
| Live progress | --output-format stream-json and parse .type |
Workflow
- Define a clear, self-contained task prompt and include file paths.
- Choose input method and output format.
- Run Gemini and capture output.
- Parse
response from JSON or monitor stream-json events.
- Report findings back to the user.
Example
gemini --prompt "Review the auth module for security issues" --output-format json | jq -r '.response'
Notes
- Gemini has its own context window; include all relevant context in the prompt.
- Use redirection/pipes for automation:
>, >>, |.
- Stdin piping supported:
cat file.txt | gemini --prompt "Analyze this".
