What it is
A Java client for the TypeSafe AI System One API (jev) plus Spring AI integrations, for Java developers building model-as-a-judge, guardrail, RAG post-processing and tool-index features.
How it uses Jev
Jev takes a state and typed questions (Noul, Choice, Score) and returns structured answers. The SDK exposes TypeSafeClient.systemOne; responses give noulValue, choiceValue, scoreValue and choice confidence, used by JevJudge, advisors, document filters/rerankers and JevToolIndex.
Primitives:choicescorenoul
Technique worth stealing
Atomic typed questions answered in parallel against one state, composed in code instead of one broad rubric prompt.
Try it
Add spring-ai-starter-typesafe, export TYPESAFE_API_KEY, then run examples.
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-centricyes0.85
- Shows a System One patternyes0.62
- Handles uncertaintyno0.05
- Measuredno0.04
- Runnableyes0.93
- Worth recommendingunclear0.40
- Model replicano0.03
- Problem scopescore on a 0–2 scale1.35
- About Jevyes0.99
Signals by Jev jev-1.13.0, card written by DeepSeek V4.1 Flash from the README on 23 Sept 2026.