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jev-toolkit

TimurHaryo/jev-toolkit

Jev decisions in Claude Code hooks plus a benchmark harness.

Agent Decisions0.41Runner-up: Evaluation & BenchmarkingFlight recorderCheck-up
Automated README summary

Automatically summarized from the README on 27 Sept 2026; not a run by jevbooks. Run instructions and author-reported outcomes still need verification.

What it is

A zero-dependency Node toolkit that puts Jev (TypeSafe AI) decisions into Claude Code hooks and provides a benchmark harness comparing Jev against native path-scoped rules on the WebSocket Inspector target repo.

How it uses Jev

Hooks call decide(area, state) via src/client, which guards, times out, retries, records/replays, and logs. Per-area modules in src/questions build typed questions and thresholds. Comment-policy and dynamic-context hooks use the returned decision to allow or deny edits; the hand-back check uses PreToolUse/PostToolUse on the Agent tool.

Primitives:choicescorenoul

Technique worth stealing

Treat Jev as a fast, calibrated classifier for hooks, not a cost saver; prefer native path-scoped rules for cost.

Try it

node bin/jev-smoke.mjs; node --test; node bin/jev-install.mjs --target "<path>" --arm all-jev

View on GitHub

Start using Jev: API key and your first request →

Model judgments from README excerpts

Project signals use repository metadata, an existing summary and the first 700 README characters, not the full project. “Not found” means not detected in that material; it does not establish absence. These are the original judgments with recorded models and dates, not source audits or run results.

Models & evaluation dates

Inclusion gate
jev-1.13.0
Project signals
jev-1.13.0
Category
jev-1.13.0
Pattern tags
jev-1.13.0

Evidence

These signals use repository metadata, an existing summary and at most 700 cleaned README characters. ≥ 0.60 means reported in that excerpt; ≤ 0.40 means not found there. The middle band is inconclusive. None is a source-code audit or a test result. The runnable-tool question excludes research experiments; the recommendation question asks for a learning shortlist, not a quality verdict.

  • Jev is core to the projectFound in material0.92
  • Shows a System One patternunclear0.46
  • Describes handling uncertaintynot found in the excerpt0.07
  • Reports measured numbersnot found in the excerpt0.11
  • Is a runnable toolFound in material0.89
  • Top-10 learning shortlist signalunclear0.58
  • Is a replica of the modelnot found in the excerpt0.06
  • Solves a common problem (0–2)score on a 0–2 scale1.17 / 2
  • About JevFound in material0.98
Signals
Jev is core to the project0.92Shows a System One pattern0.46Describes handling uncertainty0.07Reports measured numbers0.11Is a runnable tool0.89Top-10 learning shortlist signal0.58Is a replica of the model0.0600.51Solves a common problem (0–2)1.17 / 2012

no-judgment band (0.40–0.60)

Design patterns
Check-up0.79Flight recorder0.72Funnel0.46Ghostwriter0.2200.51

no-judgment band (0.40–0.60)

The Jev model and date for each judgment stage are listed above. Card written by DeepSeek V4.1 Flash from the README on 27 Sept 2026.