Antigravity CLI v1.1.8 adds `json` and `stream-json` print modes with custom schema validation.

Shipped today, targeting headless runs in CI, eval harnesses and scripts that consume agent output programmatically, plus better compound-command permission handling. This closes the last major gap with Claude Code's -p --output-format stream-json. Every major coding CLI now has a machine-readable headless mode, which is the prerequisite for building pipelines on top of them instead of inside them. (Google)