What it is
A community Rails gem that adds Rails configuration, persisted usage and cost telemetry, and opt-in confidence policies for TypeSafe's System One API, built on the typesafe-sdk Ruby gem.
How it uses Jev
Jev makes decisions through Choice, Score, and Noul questions sent in one System One call. Results expose choices, scores, nouls, usage, and response. Confidence policies gate Choice/Score side effects via act!, while Noul probabilities are thresholded directly.
Primitives:choicescorenoul
Technique worth stealing
Batch independent questions sharing state into one System One call, then gate side effects with persisted confidence policies.
Try it
bundle add typesafe-ai-rails; bin/rails generate typesafe:rails:install; bin/rails db:migrate
Evidence
Each line is one question put to Jev about the README. ≥ 0.60 reads as yes, ≤ 0.40 as no; in between Jev is not making a call.
- Jev-centricno0.16
- Shows a System One patternunclear0.48
- Handles uncertaintyno0.06
- Measuredno0.04
- Runnableyes0.98
- Worth recommendingno0.04
- Model replicano0.03
- Problem scopescore on a 0–2 scale1.01
- About Jevyes0.94
Signals by Jev jev-1.13.0, card written by DeepSeek V4.1 Flash from the README on 20 Sept 2026.