What's Google Antigravity 2.0 ? Here's What the Agent Harness Actually Changes for Developers. (opens in new tab)

Google spent years telling developers that the IDE was the right place to put AI assistance. At I/O 2026, it changed that answer. The IDE is now just one surface. The agent harness is the product. The Problem It's Solving The original Antigravity - released alongside Gemini 3 in November 2025 - was essentially an AI-native IDE. Useful, but still IDE-shaped: reactive, session-based, closed when you closed your laptop. It made the model smarter inside the editor without rethinking what a develo...