Antigravity CLI Agent Wrapper — Headless Zero-Dependency Cognitive Agent

Usage:
  antigravity [options] [prompt]
  antigravity -p "prompt"

Options:
  -p, --prompt    The text prompt to generate content for
  -m, --model     Gemini API model identifier or alias (default: gemini-3.5-flash)
                  Supported aliases:
                    - flash / gemini-flash / 3.5-flash -> gemini-3.5-flash (Frontier default)
                    - pro / gemini-pro / 3.1-pro       -> gemini-3.1-pro-preview (Frontier Pro)
  -o, --json      Output dynamic JSON response payload (choices: stream/json/default)
  --json          Output dynamic JSON response payload
  -h, --help      Show this help information

Examples:
  antigravity "Say hello"
  antigravity -p "Write an essay about AI" -m pro
  antigravity -p "Get system stats" --json
