ask-antigravity-mcp

ask-antigravity-mcp (EXPERIMENTAL)

MCP server for Google's Antigravity CLI (agy). Lets Claude get a subscription-backed second opinion / code review from Antigravity.

Experimental. Validated against agy 1.0.6, which prints the response to stdout (gemini-cli #27466 is fixed there); older versions fall back to reading agy's internal transcript files (sensitive to agy's on-disk layout). No JSON output or session id, so it stays single-turn (no multi-turn). Defaults to the Gemini 3.1 Pro (High) model, falling back to Gemini 3.5 Flash (High) on a rate limit.

Prerequisites

• agy installed and on PATH, and logged in once (run agy interactively).

Config

• ASK_ANTIGRAVITY_TIMEOUT_MS — process timeout (default 300000 = 5m).
• ASK_ANTIGRAVITY_SANDBOX — set 0 to drop --sandbox if it blocks context reads.
• ASK_ANTIGRAVITY_MODEL — agy model via --model (default Gemini 3.1 Pro (High), with Gemini 3.5 Flash (High) as the rate-limit fallback; run agy models for options).