Glossary
Short definitions for the terms that show up in Jev requests and answers.
Glossary: Abstention
Abstention is a first-class outcome: low confidence, other, or a Noul band near 0.5 — your code refuses to auto-act.
Glossary: Action space
Action space is the closed set of acts your code may take after Jev answers — including abstain. Not a generated plan.
Glossary: Calibration
Calibration means higher confidence should mean higher accuracy. TypeSafe claims RLCD trains for this; you still measure it.
Glossary: Choice
Choice picks one option from a map of up to 255 criteria and returns a distribution plus confidence.
Glossary: Confidence
Confidence is a 0–1 summary of how peaked a Choice or Score distribution is. Absent on Noul.
Glossary: Confidence threshold
A confidence threshold is your act/review/abstain floor on Choice or Score confidence — illustrations in docs are not defaults.
Glossary: Decision contract
A decision contract is the closed questions, criteria, and code thresholds you ship — not a TypeSafe legal term.
Glossary: Decision trace
A decision trace is the logged state hash, questions, answers, model id, and policy branch — not a generated chain of thought.
Glossary: Guardrail
In jev.pro usage, a guardrail is a typed Jev question plus your threshold — not a certified security product.
Glossary: Intent
Intent is a closed label you ask Jev to assign so code can route to a handler — not a generated plan.
Glossary: jev-latest
jev-latest is the SDK-default alias for the current official Jev release. It can move.
Glossary: Noul
Noul is Jev's yes/no primitive: a probability in [0, 1] with no separate confidence field.
Glossary: Ranked route
A ranked route is an ordered list of handlers from Jev probabilities — code still applies floors before it follows rank 1.
Glossary: RLCD
RLCD is TypeSafe's name for Reinforcement Learning for Calibrated Decisions.
Glossary: Score
Score places a state on 2–10 ordered levels and returns a possibly fractional expected position.
Glossary: State
State is the text or JSON payload every question in a request evaluates.
Glossary: System One
System One is TypeSafe's class of models for fast structured decisions. Jev is the first.
Jev glossary: Audit trail | TypeSafe Jev System One
Define audit trail in the Jev decision model — Jev audit trail definition. Independent unofficial notes; confirm against docs.typesafe.ai.
Jev glossary: Evidence bundle | TypeSafe Jev System One
Define evidence bundle in the Jev decision model — Jev evidence bundle definition. Independent unofficial notes; confirm against docs.typesafe.ai.
Jev glossary: Fallback | TypeSafe Jev System One
Define fallback in the Jev decision model — Jev fallback definition. Independent unofficial notes; confirm against docs.typesafe.ai.
Jev glossary: Human handoff | TypeSafe Jev System One
Define human handoff in the Jev decision model — Jev human handoff definition. Independent unofficial notes; confirm against docs.typesafe.ai.
Jev glossary: Policy check | TypeSafe Jev System One
Define policy check in the Jev decision model — Jev policy check definition. Independent unofficial notes; confirm against docs.typesafe.ai.
Jev glossary: Retrieval grounding | TypeSafe Jev System One
Define retrieval grounding in the Jev decision model — Jev retrieval grounding definition. Independent unofficial notes; confirm against docs.typesafe.ai.
Jev glossary: Risk band | TypeSafe Jev System One
Define risk band in the Jev decision model — Jev risk band definition. Independent unofficial notes; confirm against docs.typesafe.ai.
Jev glossary: Schema validation | TypeSafe Jev System One
Define schema validation in the Jev decision model — Jev schema validation definition. Independent unofficial notes; confirm against docs.typesafe.ai.
Jev glossary: Signal | TypeSafe Jev System One
Define signal in the Jev decision model — Jev signal definition. Independent unofficial notes; confirm against docs.typesafe.ai.
Jev glossary: Threshold | TypeSafe Jev System One
Define threshold in the Jev decision model — Jev threshold definition. Independent unofficial notes; confirm against docs.typesafe.ai.
Jev glossary: Verdict | TypeSafe Jev System One
Define verdict in the Jev decision model — Jev verdict definition. Independent unofficial notes; confirm against docs.typesafe.ai.