2D Combat Arena with Boss AI

Shlok Sangamnerkar built a 2D combat arena with Jev to experiment with an autonomous boss AI that fights in real time. He tested self-play with different personality vectors and found that toggling state and prompts changed its strategies.

View on X

Shlok Sangamnerkar@vicmakes_stuff𝕏

Vibe coded a 2D combat arena with Jev. The goal was to experiment with building an autonomous boss AI that actually fights smart and tries to win in real time. It’s not quite unbeatable yet, but watching it self-play with different personality vectors has been fun. Toggling state being sent and prompts was changing the strats quite a lot. Would love to hear any ideas or prompt suggestions to make

Sep 19, 2026X postsView on X

The boss is not yet unbeatable. Sangamnerkar invited ideas and prompt suggestions.

Also filed under Games & real time

Benchmarks Jev on Pokémon Red
The project benchmarks Jev, TypeSafe’s fast decision model, against Jev paired with a GPT-6 Sol planner for playing Pokémon Red.
Plain-English Cellular Ecosystem Simulator
LifePot is a cellular automaton-inspired ecosystem that users describe in plain English. Jev turns those inputs into species, feeding relationships, reproduction strategies, and environmental conditions.
Mapping Children's Behavioral Intent in Games
Mores Research used Jev to map children’s behavioral intent in games and examine how it correlates with real-world behavior. It reports mapping intents across 45+ real sessions involving 20 child users over a long horizon.
StarCraft Agent for Fast Tactical Decisions
Jev_Star is a StarCraft agent experiment that uses Jev for fast tactical decisions.