Matt Shumer shares Manager Loop that got GPT-6 Astra to build Manhattan in Unreal over a week
SEO · x · 2026-09-04
- Matt Shumer showed GPT-6 Astra building a Manhattan world in Unreal Engine street by street over a week, and explained the orchestration that made it possible.
- The Manager Loop:
- Launch a "manager" agent, discuss the goal with it, have it build a massive checklist and break it into phases;
- The manager spawns a second Codex agent (the "implementer") in a separate thread, and the two coordinate;
- It layers a few new ideas on tricks used with far weaker models years ago — combined, Astra's ability on very hard long-horizon tasks jumps dramatically.
- His takeaway: Astra alone struggles at this difficulty by default; external orchestration structure, not raw model capability, carries the run.
Related event: Matt Shumer Reveals "Manager Loop" for Long-Horizon AI Tasks(3 posts)→
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