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LLM Agents Master Minecraft Piston Doors, Nearing World Record
Vjeux tested LLM agents on Minecraft redstone piston doors, from building a 3x3 door in one pass to designing near-record solutions without human examples.
2026-10-18 ~ 2026-10-20 · 2 episodes · 6 posts
Episode 1 · Ex-Meta Engineer Tests LLM Building Piston Door in Minecraft (2026-10-18, 3 posts)
Former Meta engineering director Vjeux demonstrated an LLM autonomously setting up a Minecraft environment and building a 3x3 piston door in one pass. On follow-up, he found the top block was actually slime, making the door non-compliant, and has asked the model to fix it.
- LLM one-shots a Minecraft 3x3 piston door by building its own Linux test infra — Vjeux · 2026-10-18
- Follow-up: the AI-built piston door wasn't strictly 3x3 — a slime block cheat — Vjeux · 2026-10-18
- Vjeux gets AI to build a proper 3x3 in Minecraft, now probing how small it can go — Vjeux · 2026-10-18
Episode 2 · AI Agents Nearly Match Minecraft Redstone Door Records via Trial and Error (2026-10-19, 3 posts)
Vjeux reports that AI agents, given no human examples, built hundreds of Minecraft piston-door variants and independently found a 3x3 design one block off the world record, and solved in 2 days a 7x8x1 door the community had sought for years—albeit using sculk.
- AI Agents Build Hundreds of Minecraft Piston Doors, Land One Row Short of World Record — Vjeux · 2026-10-19
- AI Agents Reinvent Minecraft Piston Doors From Scratch, One Block Off World Record — Vjeux · 2026-10-20
- LLMs find Minecraft's elusive 7x8x1 door in 2 days after years of human searching — Vjeux · 2026-10-20