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jev-system-one-model-primitives

bobbylite/jev-system-one-model-primitives

Three demos of Jev primitives: Noul, Score, Choice.

Automated README summary

Automatically summarized from the README on 9 Oct 2026; not a run by jevbooks. Run instructions and author-reported outcomes still need verification.

What it is

A TypeScript sample app demonstrating TypeSafe's Jev System One model primitives: Noul (is it a sandwich?), Score (how much of a cult is it?), and Choice (route the chaos). It includes a web UI and a Cloudflare Worker backend with authentication and spend controls.

How it uses Jev

Jev is called via POST /api/classify, /api/cult/score, and /api/chaos/route. Each endpoint sends a state and typed questions (Noul, Score, or Choice) to Jev, which returns calibrated probabilities. Plain code in src/worker/policy/ applies weights and policy to turn Jev's answers into a verdict.

Primitives:choicescorenoul

Technique worth stealing

Separate Jev's probabilistic judgments from the deterministic policy that turns them into decisions.

Try it

Visit the live demo at https://jev-primitives.bobbylite.workers.dev and sign in.

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-1.13.0
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 material0.95
  • Shows a System One patternFound in material0.75
  • Describes handling uncertaintynot found in the excerpt0.07
  • Reports measured numbersnot found in the excerpt0.05
  • Is a runnable toolFound in material0.85
  • Top-10 learning shortlist signalunclear0.49
  • Is a replica of the modelnot found in the excerpt0.05
  • Solves a common problem (0–2)score on a 0–2 scale0.03 / 2
  • About JevFound in material0.98
Signals
Jev is core to the project0.95Shows a System One pattern0.75Describes handling uncertainty0.07Reports measured numbers0.05Is a runnable tool0.85Top-10 learning shortlist signal0.49Is a replica of the model0.0500.51Solves a common problem (0–2)0.03 / 2012

no-judgment band (0.40–0.60)

Design patterns
Questionnaire0.97Scorecard0.96Funnel0.93Prefetch0.57Traffic light0.45Question bank0.38Inspection0.24Fail open, fail closed0.2000.51

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 9 Oct 2026.