93 subagents, 12 hours, under $1,000: Antigravity builds an OS kernel that runs Doom
AI Engineer · youtube · 2026-09-28
Kevin Hou, engineering lead for Google DeepMind's Antigravity, demonstrated building an operating system kernel from scratch that runs Doom using 93 subagents, 12 hours, 2 billion tokens and under $1,000. The guiding principle: "Give Messi the ball and get out of the way" — products should get better every time the model does.
Key points:
- Evolution: autocomplete (2022) → agents (2024) → agent managers (2025) → agent teams (2026)
- Lessons from hard calls: removing chat from Windsurf, splitting the agent manager from the IDE
- Antigravity 2.0's three building blocks:
- Dynamic subagents: Gemini 3.5 Flash leads teams via /teamwork
- Sidecars: a new plugin protocol letting agents listen for webhooks, cron jobs and messages
- Generative UI: status views rendered on the fly
- DeepMind researchers automated 90% of eval analysis with 100 parallel hypothesis agents
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