Jev glossary
EcosystemDeny by default
Fail closed
When the model errors, times out, or lacks evidence, the system escalates or blocks instead of allowing the action.
- Category
- Ecosystem
- Also known as
- Deny by default
- Reading time
- 1 min
- Related terms
- 4
- Directory entries
- 2
- Docs
- Not listed
- Added
- 2026-09-28
Definition
jev-guard turns timeouts, 5xx, and 429 responses into manual review, never an automatic pass. Hard rules for sanctions and large amounts run before the model is called. jev-suite fails a check closed when no evidence was retrieved, and a missing model escalates.
Fail closed is a property of the surrounding code. The model does not know the policy. The gate has to be written, tested, and logged, including the cases where Jev never answered.
Tagssafetyrouting
Related terms
Definitions that connect to this one.
Fail openWhen Jev is down or slow, the gate allows the action, including rules that would otherwise block it.EcosystemHuman reviewThe explicit path for uncertain or high-stakes cases: route to a person instead of acting on a low-confidence answer.PatternsConfidence gateA threshold on confidence that decides whether code acts, confirms first, or escalates to a person or a bigger model.Answers & ConfidenceRisk triageJev scores a transfer or a claim. Hard rules and a routing matrix in code decide whether to pass, review, or freeze.Patterns
From the Jev directory
Directory entries that go deeper on this term.
A Java gateway that asks Jev four questions about a deposit or withdrawal, then applies a direction-aware routing matrix in code.
Jev Tools & CLIs#community#java#security
Community
klauswg/jev-guardJava
klauswg/jev-guardJavaFour Java checkers (sponsored video, hiring fit, edit fidelity, and rental listings) that keep thresholds and vetoes in unit-tested code.
Jev Tools & CLIs#community#java#verification
Communityklauswg/jev-suiteJava
klauswg/jev-suiteJavaFrom the Jev AI model community
Posts from builders shipping with Jev right now.