Live Jev — vinilana

Both cars meet the same cones, barriers, cars and pedestrians at the same absolute road positions from a seed-generated spawn schedule, with the same state shape and a Decision-interval slider for equal cadence. A live table compares distance, latency, tokens and cost per decision.

Lane action, speed action, hazard score and pedestrian yield go in one call with speculative fan-out. Low-confidence lane changes are ignored, strong yield overrides speed, severe hazard forces slowdown, and distant stops soften to slowdown scaled by answer interval.

Because the API rejects browser origins and the key must not reach the client. server.js hosts the static files and proxies /api/decide to TypeSafe with the official SDK, plus /api/llm-decide for the OpenRouter comparison track, while TYPESAFE_API_KEY and the optional OPENROUTER_API_KEY stay in .env on the server. Copy .env.example to .env, then npm install and npm start on port 3000. With no key at all the sim still runs on a clearly labelled rule-based fallback brain.

Pick slalom, chicane, parked cars, gauntlet, single-lane squeeze, random obstacles or empty road from presets.js, click the road to add cones, barriers, cars, trucks or pedestrians, and run headless.js in Node for keyless or BRAIN=jev runs.

lane_action and speed_action are choices, hazard is a score from 0 to 3, and pedestrian_yield is a noul giving the probability that the car must stop for a pedestrian. All four go in a single call every 200 ms as speculative fan-out.

It tracks distance, average speed, decisions, latency, input and output tokens, cost so far, cost per decision, cost per km and projected cost per hour. Jev is priced at $0.042 per million input tokens with free output and the LLM price comes from OpenRouter, and both can be overridden in .env.

Constants live in public/js/config.js, question wording in public/js/brain.js and the state schema in public/js/sensors.js. Enter a seed to replay the same scenario, and run scripts/headless.js with BRAIN=jev or BRAIN=llm for live or keyless runs, plus TRACE=1 to dump states.