Antigravity (agy)
Google's agent CLI as an engine, using your Google sign-in.
In short
Antigravity is Google's agent CLI. It uses your Google sign-in and plan, so it needs no API key. Thesivor detects it, lists its models, and re-checks the installed version before every call.
1Install and sign in
Install Antigravity and run it once to sign in.
2Re-scan in Settings
Settings → AI engines lists its models. Pick one for a tier.
For technical users
Invocation: agy -p "<prompt>" --output-format stream-json --json-schema <schema> --model <m> --effort low --sandbox --add-dir <runDir> --print-timeout <timeout − 15>s; the answer is result.structured_output from the final {"event":"result"} line. The CLI can update itself between sessions, so before every real call Thesivor re-reads --version and, if it changed, re-reads --help and runs one smallest-possible probe; a vanished required flag stops the call with an inline notice. In headless mode agy cannot read an image file, so it cannot do Vault Vision extraction.