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A bounded Jev risk check for Claude Code: eight risk axes, one request, one optional reinspection.
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- Last pushed
- Updated Sep 2026
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Jev directory
CommunityJev Agents & MCP
Jev Preflight
A Claude Code plugin that baselines your working state at turn start, then sends a selected, redacted turn diff at Stop to Jev, which evaluates eight risk axes in one request; in assist mode high risk earns at most one more investigation.
- Stars
- 3
- Language
- Go
- License
- MIT
- Reading time
- 2 min
- Published by
- Community
- Author
- muse0509
- Last verified
- Oct 2026
Highlights
- Hooks UserPromptSubmit to create a private Git baseline and Stop to send the redacted turn diff to Jev, which scores eight risk axes in one request.
- The axes: behavior regression, authorization, input validation, data integrity, error handling, compatibility, lifecycle and regression tests.
- In assist mode a score at or above the threshold earns one additional investigation before Claude finishes; the default 0.85 threshold is uncalibrated.
- Ships defaultEnabled: false; key precedence is CLAUDE_PLUGIN_OPTION_TYPESAFE_API_KEY then TYPESAFE_API_KEY, and a no-key hook fails open.
- Not an autofix or merge blocker: the README says the signals do not replace tests, linters, SAST or secret scanning.
Quickstart
bash
claude plugin marketplace add muse0509/jev-preflight
claude plugin install jev-preflight@jev-preflight
claude plugin enable jev-preflight@jev-preflightWatch out
Grounded on the truncated README and GitHub metadata reviewed 2026-10-15; the configuration JSON is cut off mid-file. Status is v0.1.0 public beta verified with synthetic code only, CI was pending at finalization, and the marketplace commands need the matching release archive published.
Questions about this entry
Short answers drawn from the linked project or page.
It catches risky code changes before Claude Code finishes a turn: it creates a private Git baseline when you submit a prompt, then sends the selected, redacted diff at Stop to Jev for an eight-axis risk evaluation in one request.
Behavior regression, authorization, input validation, data integrity, error handling, compatibility, lifecycle, and regression tests. Each axis directs Claude's attention; they are signals, not proof of defects.
In assist mode Claude gets at most one additional investigation before finishing and should change code only when it finds evidence. Background tasks or scheduled wakeups defer evaluation and keep the baseline.
Yes for evaluation. The key comes from the sensitive typesafe_api_key plugin option or the TYPESAFE_API_KEY environment fallback; without a key the hook fails open, and the README warns never to paste keys into files.
Neither. The README describes it as a preflight signal that does not replace tests, linters, SAST or secret scanning, and the default 0.85 threshold is explicitly uncalibrated.
v0.1.0 public beta. User-run checks verified the live API contract, fail-open behavior and a key-enabled round-trip with exactly one continuation on Claude Code 2.1.267 using synthetic code; CI was pending at finalization.
Claude Code 2.1.257+, Git and Bash; Windows needs Git for Windows with Git Bash on PATH, not WSL. Binaries cover macOS, Linux and Windows on amd64 and arm64; Go is only needed for source development.
Reactions & coverage
Posts, threads, and videos about this entry from around the web.
Hacker News: Thread on Selmar's Jev code-review calibration notes and ordering.py comparisons.
Lectem2 pointsCalibrating Jev as a Code ReviewerRead the thread on Hacker NewsHacker News: Jev classifies agent PR hunks as P0, P1, or P2 so reviewers see P0 first.
namanbhulawat47 pointsJev Based Code ReviewRead the thread on Hacker NewsX: Magic Jev Ball for code review
X: jev-review: a local-first score loop for coding agents
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