Automated README summary
Automatically summarized from the README on 20 Sept 2026; not a run by jevbooks. Run instructions and author-reported outcomes still need verification.
What it is
A latency demo comparing Jev, a typed-decision model, against chat LLMs on Vercel AI Gateway. Each model plays the right paddle in Pong; one decision moves the ball one segment. Built by Ably's co-founder.
How it uses Jev
The agent asks Jev for a move once per ball step, sending a ~125-byte JSON state of court, ball, paddle and interceptY. Jev returns a typed choice (up, down, stay) via experimental_evaluate, and the agent applies it to the paddle.
Primitives:choice
Technique worth stealing
Same serve, rules, question and Gateway key across lanes, so a lane's speed is purely that model's decision latency.
Try it
Play at jev-pong.ably.dev with arrow keys or W/S, or drag on a phone.
Model judgments from README excerpts
Project signals use repository metadata, an existing summary and the first 700 README characters, not the full project. “Not found” means not detected in that material; it does not establish absence. These are the original judgments with recorded models and dates, not source audits or run results.
Models & evaluation dates
- Inclusion gate
jev-1.13.0- Project signals
jev-1.13.0- Category
jev-1.13.0- Pattern tags
jev-1.13.0
Evidence
These signals use repository metadata, an existing summary and at most 700 cleaned README characters. ≥ 0.60 means reported in that excerpt; ≤ 0.40 means not found there. The middle band is inconclusive. None is a source-code audit or a test result. The runnable-tool question excludes research experiments; the recommendation question asks for a learning shortlist, not a quality verdict.
- Jev is core to the projectnot found in the excerpt0.33
- Shows a System One patternFound in material0.84
- Describes handling uncertaintynot found in the excerpt0.04
- Reports measured numbersnot found in the excerpt0.14
- Is a runnable toolnot found in the excerpt0.20
- Top-10 learning shortlist signalnot found in the excerpt0.28
- Is a replica of the modelnot found in the excerpt0.04
- Solves a common problem (0–2)score on a 0–2 scale0.01 / 2
- About JevFound in material0.98
no-judgment band (0.40–0.60)
no-judgment band (0.40–0.60)
The Jev model and date for each judgment stage are listed above. Card written by DeepSeek V4.1 Flash from the README on 20 Sept 2026.