Automated README summary
Automatically summarized from the README on 26 Sept 2026; not a run by jevbooks. Run instructions and author-reported outcomes still need verification.
What it is
A proof-of-concept showcasing Jev, TypeSafe's System One model that returns typed, calibrated decisions instead of prose. It provides twenty demos across seven shapes, with a cost-and-agreement assessment against a chat-model baseline, for developers exploring decision models.
How it uses Jev
Jev takes a state and a map of named questions (Choice, Score, Noul) and returns typed answers with calibrated probabilities. In each demo, the state is the input (e.g., a ticket, a diff, a document), questions are defined in the demo manifest, and the returned answers feed into plain TypeScript policy code that makes decisions.
Primitives:choicescorenoul
Technique worth stealing
Policy lives in code, not in the model: thresholds and branching are plain TypeScript, unit-testable and retunable without re-running inference.
Try it
pnpm install && pnpm dev (works without a key using fixtures)
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 material0.93
- Shows a System One patternFound in material0.64
- Describes handling uncertaintynot found in the excerpt0.07
- Reports measured numbersnot found in the excerpt0.16
- Is a runnable toolnot found in the excerpt0.22
- Top-10 learning shortlist signalFound in material0.64
- Is a replica of the modelnot found in the excerpt0.08
- Solves a common problem (0–2)score on a 0–2 scale0.28 / 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 26 Sept 2026.