I Analyzed 3 Months of Google Antigravity IDE Failures - Here's What's Actually Breaking

A personal story, data-backed research, and a product proposal for workflow continuity in agentic AI IDEs. I want to start with what impressed me — because I was genuinely impressed. When I first started using Google Antigravity IDE, I kept stopping mid-session just to watch it work. The agent would read my codebase, build a mental model of the architecture, open the browser, verify UI behavior, and iterate on failures — all without me typing a single line of code. Gemini 3.1 Pro handling a cross-file dependency refactor that would have taken me the better part of an afternoon. In fifteen minutes. Autonomously. The underlying models are legitimately exceptional. The benchmark numbers aren't marketing — the reasoning quality in actual use reflects them. I was hooked. I started using Antigravity for real work. That's when I started hitting walls. The First Wall About 40 minutes into a complex debugging session, mid-agent-execution: Agent terminated due to error. No warning. No checkpoint