What it is
jev-gate is a safety gate for AI coding agents like Claude Code, Codex and Cursor. It answers allow, ask or deny for every tool call, and ships a 300-call injection test showing what the gate catches and what walks past it.
How it uses Jev
After deterministic hard rules and a read-only allowlist, Jev makes one request with two typed questions in parallel to judge a shell command. Its calibrated probabilities feed thresholds that produce allow, ask or deny. Any error or timeout falls back to the harness's normal permission prompt.
Primitives:choicescore
Technique worth stealing
Order the layers deliberately: denials before the allowlist, hard rules before the model, because the model is least reliable where a hard rule is easiest.
Try it
claude plugin marketplace add eugeniughelbur/jev-engineering; claude plugin install jev-engineering@jev-engineering
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-centricyes0.77
- Shows a System One patternyes0.86
- Handles uncertaintyno0.13
- Measuredyes0.70
- Runnableyes0.91
- Worth recommendingunclear0.49
- Model replicano0.05
- Problem scopescore on a 0–2 scale1.95
- About Jevyes0.98
Signals by Jev jev-1.13.0, card written by DeepSeek V4.1 Flash from the README on 21 Sept 2026.