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jev-arena

neurogabo/jev-arena · Homepage

Play Pokémon battles against Jev, TypeSafe's decision model, locally.

Game & Simulation0.97Runner-up: Agent Decisions
Automated README summary

Automatically summarized from the README on 1 Nov 2026; not a run by jevbooks. Run instructions and author-reported outcomes still need verification.

What it is

A local Pokémon Champions battle arena where you play against Jev, TypeSafe's decision model, using a pinned Pokémon Showdown engine, team selection, random teams, battle animations, and private decision reviews.

How it uses Jev

Each turn Showdown lists legal moves and switches; Jev receives its side's visible information, a short battle memory, and reference rules. Jev picks a shortlist of promising actions, the simulator summarizes possible opponent replies, and Jev chooses its action from those summaries.

Primitives:choice

Technique worth stealing

Two-stage decision: Jev shortlists candidate actions, then re-ranks them using simulator summaries of possible opponent replies.

Try it

npm ci, npm run setup, npm run start:offline, then open http://127.0.0.1:8160.

View on GitHub

Start using Jev: API key and your first request →

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-1.14.0
Project signals
jev-1.14.0
Category
jev-1.14.0
Pattern tags
jev-1.14.0

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 projectFound in material0.84
  • Shows a System One patternnot found in the excerpt0.14
  • Describes handling uncertaintynot found in the excerpt0.03
  • Reports measured numbersnot found in the excerpt0.03
  • Is a runnable toolFound in material0.91
  • Top-10 learning shortlist signalnot found in the excerpt0.20
  • Is a replica of the modelnot found in the excerpt0.39
  • Solves a common problem (0–2)score on a 0–2 scale0.02 / 2
  • About JevFound in material0.99
Signals
Jev is core to the project0.84Shows a System One pattern0.14Describes handling uncertainty0.03Reports measured numbers0.03Is a runnable tool0.91Top-10 learning shortlist signal0.20Is a replica of the model0.3900.51Solves a common problem (0–2)0.02 / 2012

no-judgment band (0.40–0.60)

Design patterns
Funnel0.6400.51

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 1 Nov 2026.