Automated README summary
Automatically summarized from the README on 25 Sept 2026; not a run by jevbooks. Run instructions and author-reported outcomes still need verification.
What it is
A harness, web UI and experiments where TypeSafe's jev plays Craftax (JAX Crafter), optionally guided by an OpenAI-compatible LLM planner. For researchers comparing System One and System Two agents.
How it uses Jev
Each step, code lists feasible macro options or raw actions with facts. Jev picks one Choice among them, optionally guided by an LLM-written objective and standing rules. The chosen option is executed in the game.
Primitives:choice
Technique worth stealing
Give jev facts, never advice; let it choose among typed options.
Try it
uv sync; cp .env.example .env; craftax_agent/run_server.sh; open http://localhost:8765
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 projectFound in material0.94
- Shows a System One patternFound in material0.82
- Describes handling uncertaintynot found in the excerpt0.07
- Reports measured numbersnot found in the excerpt0.12
- Is a runnable toolnot found in the excerpt0.19
- Top-10 learning shortlist signalunclear0.59
- Is a replica of the modelnot found in the excerpt0.10
- Solves a common problem (0–2)score on a 0–2 scale0.03 / 2
- About JevFound in material0.99
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 25 Sept 2026.