Antigravity (Google) — Summary

Status: Tier C — insufficient public material

Antigravity is Google's AI IDE, first hinted at in early 2025 and believed to be a VS Code-based fork (similar to Cursor's relationship to VS Code). The public marketing site antigravity.google/ was unreachable at analysis time (connection refused). The only publicly documented evidence comes from the antigravity-link-extension (a third-party VS Code extension by cafeTechne that acts as a mobile companion for Antigravity sessions), which reveals that Antigravity runs with a Chrome DevTools Protocol (CDP) remote debugging port and has a chat-based session interface.

From the companion extension's documentation: Antigravity is launched with --remote-debugging-port=9000, has a workbench.html target, supports session-level AI generation (with start/stop), accepts file uploads, and has Language Server RPC. Beyond these CDP-observable facts and the companion extension's OpenAPI spec, no architectural documentation, system prompts, or configuration schema are publicly available.

Closest seed: kiro — both are IDE-fork products with proprietary AI primitives. Antigravity appears to share kiro's "closed IDE with proprietary spec format" archetype.