Descriptions:
Brian Casel, a developer who covers AI-assisted software building at Builder Methods, gives Google Antigravity its first real stress test after setting aside dedicated time to move beyond demo videos. Antigravity is Google’s new agentic IDE — a fork of VS Code — distinguished primarily by its Agent Manager view, which allows developers to manage multiple projects with parallel agents from a single centralized window and use an automated Chrome-based review process to verify agent output.
Casel walks through the full setup experience, including importing Cursor key bindings and settings (possible because both are VS Code forks), and then attempts to use the Agent Manager for green-field development. What follows is an honest account of a product that shows real conceptual ambition but ships with significant bugs: sessions failing silently, terminal access gated behind an active agent conversation, confusing workspace naming behavior, and noticeably slower Gemini 3 inference inside Antigravity compared to running the same model in Cursor.
The video is useful for developers evaluating whether to adopt Antigravity now or wait. Casel’s framing is measured — he credits the multi-workspace agent paradigm as a genuine step forward for agentic IDEs and suggests Cursor could learn from it — but concludes that the current build is too rough for professional use. Anyone tracking the competitive landscape between Google, Anthropic’s Claude Code, and Cursor will find this a grounded, firsthand data point from a practitioner who uses these tools daily.
📺 Source: Brian Casel · Published December 08, 2025
🏷️ Format: Review
