gemini-sub-agent

Launch the Gemini CLI as a headless sub-agent in a tmux pane, monitor its stream-json JSONL output, and poll for completion. Use this when delegating a well-defined task to a Gemini agent subprocess with live observability. Triggers include "run gemini agent", "delegate to gemini", "gemini sub-agent", or any request to run Gemini headlessly and monitor it.