Jev Studio

Jev Studio</h1>
<br>

One-stop kit for playing with TypeSafe's Jev: MCP tools for Choice/Noul/Score, ready-made prompt libraries, and slash commands for every cookbook.

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## Install

```bash
pip install jev-studio
```

Two commands are installed:

- `jev` — the CLI for TypeSafe's Jev decisions (verify, screen, classify, extract, match, route, ask, find, rerank, compact, batch).
- `jev-studio` — the MCP server that serves the Jev ruleset over stdio.

## The CLI: `jev`

Jev turns natural-language state and a set of typed questions into typed answers (yes/no, choice, or score) with probabilities. The CLI wraps it in one-command judgments over text you pipe in.

### Authenticate

Any one of these is enough (first found wins):

```bash
jev auth login               # store TYPESAFE_API_KEY in the OS keychain (or 0600 file)
export TYPESAFE_API_KEY=...  # from https://console.typesafe.ai/settings/keys
export OPENROUTER_API_KEY=sk-or-...
export CLOUDFLARE_API_TOKEN=... CLOUDFLARE_ACCOUNT_ID=...
```

Inspect what's live: `jev auth status`.

### Commands

Every command speaks JSON (`--json`), Markdown (`--md`), JSONL, CSV, TSV, or a colored text table. Use `--pluck` to lift one field. Use `--fail-on <list>` to make the process exit 2 when