Jev Snake Arena

One request per turn carries every snake's question. Cost is input tokens × $42 per billion; output is free. Forced moves (one legal option) skip Jev.

A persona is one sentence of instructions. Same code, same facts, different play. heuristic is a rule-based baseline that never calls Jev.

Select custom on a snake to use this text as its instructions.

Battlesnake rules on an 11×11 board: simultaneous moves, walls and bodies kill, head-to-head goes to the longer snake, health drops 1 per turn and food resets it to 100 and grows you. Each turn the code lists every snake's legal moves and computes facts for each one (reachable space, distance to food, which enemy heads can reach that square). Those facts become the options of a Choice question. Jev returns a probability per option and a confidence; the snake takes the argmax. Nothing in the loop reasons or plans. The persona is the only text that changes.