Ex-Meta Engineer Tests LLM Building Piston Door in Minecraft

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.

2026-10-18 ~ 2026-10-18 · 3 related posts

• 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