jev-codes
Standards gate for agent-written diffs: YAML rules plus parallel Jev questions before merge.
Overview
jev-codes audits git diffs hunk-by-hunk against editable YAML standards. Jev answers typed questions; it never writes code.
Problem: Agent-written diffs need merge gates that stay consistent across repos and agents.
Built for: Teams using Claude Code, Cursor, Codex, opencode, or Antigravity with YAML standards packs.
First indexed on Jev Directory: 2026-09-19
Creator and team
- Name
- Kushal Agarwal
- Handle
- @kushwho11146
“Point Jev at your diff and a YAML standards pack. Your agent gets a merge opinion that is not vibes-only.”
How Jev is used
- Role in the product flow
- Pre-merge audit gate on changed hunks
- Primitives
- ChoiceScoreNoul
- State in
- Per-hunk state {file, language, hunk, context_before, context_after} under 24k token budget per README.
- Decision out
- Thresholded pass or fail per pack question; JSON or TTY report with fail-on levels.
- git diff to hunks, filter ignores
- One parallel Jev call per hunk (eight in flight)
- Apply thresholds and min_confidence from YAML pack
Packs are YAML question definitions including noul items that skip the confidence gate by design. The CLI caches answers by hash of state plus question text so reruns only re-score changed hunks. Agents invoke audit --json and fix only high or medium findings at reported lines per harness adapters.
Sourced performance claims
- Eval runner reports HIGH gate precision 1.000 on six cases at ~$0.0006 for 17 calls.Source: github.com/kushwho/jev-codes README eval section
Features and stack
Features
- npx @kushwho/jev-codes audit with --json for agents
- Bundled core pack plus per-repo .jev-codes/standards.yaml
- Harness plugins for Claude, Cursor, Codex, opencode, Antigravity
- jev-codes-eval labeled diff suite in repo
Stack
- TypeScript CLI
- YAML standards packs
- Git
- TypeSafe System One
Pricing: Live Jev calls require TYPESAFE_API_KEY; README cites fraction-of-a-cent per audit.
Demo
Showcase clip with the same lightbox player as the homepage. Click to play.
jev-codes standards gate
Point Jev at your diff and a YAML standards pack. Your agent gets a merge opinion that is not vibes-only.
Links
FAQ
- Does Jev edit my code?
- No. README states Jev only answers typed questions; agents apply fixes.
Related learn guides
Original Jev guidance that pairs with this product pattern.
- System One model
The model family behind Jev: parallel typed questions, one forward pass, probabilities you can threshold.
- Jev vs LLM classification
When to gate with System One probabilities instead of asking a chat model to label things.
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