jevkit

Rust CLI for Jev that lints typed question sets offline, then sends them and prints probabilities, labels and scores as JSON.

CLIbeta

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Overview

jevkit is a command-line client for TypeSafe's Jev, installed as the jev binary (crate jevkit-cli). You write noul, choice and score questions in terse YAML or JSON, or inline with --noul, pass a passage, and get back JSON with probabilities, labels and score values on stdout.

Its main idea is validation before billing. The README points out that the API happily charges for questions that cannot inform you, such as a choice with one option or a score with one level, and that label descriptions act as the prompt. jev lint runs offline rule checks (about 0.5 ms) and returns a distinct exit code so CI or a pre-commit hook can reject such sets. Other features include a per-call usage ledger, layered config, keyring-stored keys and an agent skill so coding agents can drive the CLI. It is for developers and agents who call Jev from scripts.

What the decision model decides

Type	Question	Answers
Yes / no	Is this risky? (any inline yes/no question)	—
Choice	Which severity label applies to the passage?(inferred)	low · medium · high
Score	How urgent is this passage?(inferred)	—

How it works

Write a question set in YAML/JSON or pass --noul inline
jev lint checks it offline and exits 2 if a question is billed-but-useless
jev ask expands the terse form to the canonical wire payload and calls Jev
Parsed answers print as JSON; optional --log records request, tokens and cost

Strengths

Catches useless or forced questions before any paid call
Machine-friendly JSON output and documented exit codes for CI
Keys kept in the OS keyring, not shell history
Ships an agent skill for coding agents

Caveats

Calls the hosted Jev API (or a configured provider) for answers
README counts of lint rules differ between sources (13 vs 20)
Licence not stated in the list entry

Getting started

cargo install jevkit-cli (installs the jev binary), or curl -fsSL https://raw.githubusercontent.com/ariel-frischer/jevkit/main/install.sh | sh

At a glance

Type: CLI
Status: beta
Language: Rust
Runtime: CLI
Has code: yes
Has tests: yes

Use cases and integrations

Infra / SDKs / Integrations537

How curated lists describe it

Developer tooling: Rust CLI that validates `Choice`/`Score`/`Noul` question sets with 13 offline lint rules before any Jev call, then sends the canonical wire payload and prints parsed, confidence-bearing JSON answers to stdout using exit code 2 to reject a billed-but-useless request.
yibie/awesome-jev
Fast Rust CLI for TypeSafe Jev: typed decisions, offline linting before you pay.
hellogumbo/awesome-jev

Frequently asked questions

What does jev lint check?

It flags question sets that would be billed but uninformative, such as single-option choices or criteria that just restate labels.

Is it faster than curl?

Not for the API call itself; the README says the saving is in what you write and in offline linting.

Does it need a TypeSafe key?

Yes for jev ask; jev lint works entirely offline.

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