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CommunityJev Demos & Experiments
Jev Craft
Minecraft survival bot built on Mineflayer that asks Jev four typed questions every 600ms — threat level, action, whether to eat, flee direction — plus a tactical goal-selection loop, with simulated emotions and persistent memory feeding each request.
- Stars
- 3
- Reading time
- 2 min
- Published by
- Community
- Added
- Oct 2026
Highlights
- Minecraft survival bot built on Mineflayer that uses Jev for typed decisions instead of hardcoded rules.
- Sends four typed questions every 600ms: threat level, action, whether to eat, and flee direction.
- Runs a tactical goal-selection loop every 10 seconds that picks a goal, urgency, and approach.
- Tracks four live emotions (fear, satisfaction, curiosity, urgency) that decay each tick and shape Jev requests.
- Persists memory of shelter, crafting stations, furnaces, death locations, animal areas, and player preferences across restarts.
Questions about this entry
Short answers drawn from the linked project or page.
It requires Node.js 18 or newer and is released under the MIT License, according to its repository badges.
Every 600ms it sends current world state to Jev and receives four typed answers in one parallel API call: threat_level, action, should_eat, and flee_direction.
Every 10 seconds it builds an inventory and memory snapshot, then asks Jev to choose a goal from 13 options, assess urgency, and select an approach in one parallel call.
Requests include current game state such as health, food, hostiles, position, time, and goal, plus emotional state and contextually recalled memories.
It persists shelter, crafting stations, furnaces, death locations, animal areas, and player preferences, and surfaces relevant memories contextually each tick.
It tracks per-step failures and asks Jev whether to retry or abandon the stuck goal entirely.
It is specifically a Minecraft survival bot built on Mineflayer and Jev, not a general-purpose agent, chat model, or text generator.
Reactions & coverage
Posts, threads, and videos about this entry from around the web.
Hacker News: Software Bombe and live Enigma demo where Jev ranks cribs and judges plaintext.
ag_212 pointsShow HN: Jev as the Bletchley Park Analyst: A Software Bombe on EnigmaRead the thread on Hacker NewsHacker News: Show HN for public Minecraft PvP where a diffusion LM picks moves from structured state.
2 pointsShow HN: Minecraft PvP against DiffusionGemma-as-Jev, 24 ms per decisionRead the thread on Hacker NewsHacker News: Show HN: Jev finished a Pokémon Red run, with the Hall of Fame stats on the landing page.
pancomplex272 pointsShow HN: Jev Plays Pokémon RedRead the thread on Hacker NewsHacker News: Show HN: a mouse colony where each next move is Jev or a fixed rule.
1 pointShow HN: Jev-mice – mouse colony simulation using Jev and deterministic engineRead the thread on Hacker NewsMore Jev resources like this
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