JEV USE CASE
Real-Time Game Decisions.
Select movement, targets or tactical modes from live game state without waiting for a generative response.
THE DECISION CONTRACT
STATE
Player health 18%, enemy distance 3 tiles, healing item available, exit 5 tiles north.
QUESTION
Which tactical mode should the character enter?
CHOICES
fight heal flee loot explore
TYPESCRIPT EXAMPLE
Ask for one bounded answer
This Vercel AI SDK-shaped example is illustrative. Check the current provider documentation before shipping.
import { experimental_evaluate as evaluate } from 'ai';
const result = await evaluate({
model: 'typesafe-ai/jev',
state: "Player health 18%, enemy distance 3 tiles, healing item available, exit 5 tiles north.",
questions: {
decision: {
type: 'choice',
instructions: "Which tactical mode should the character enter?",
options: ["fight","heal","flee","loot","explore"]
}
}
});
// Validate permissions and thresholds before acting.
console.log(result.answers.decision);SAFE IMPLEMENTATION
Keep the boundary clear
Guardrail
Keep physics, collision, inventory validity and safety-critical reflexes in the game engine.
- Log the input, answer distribution, chosen threshold and resulting route.
- Test on labelled examples from your own production distribution.
- Send low-confidence, high-impact or out-of-distribution cases to a safer fallback.
- Re-evaluate thresholds when the model or workflow changes.
PRIMARY SOURCES