jev-studio

<div align= "center"> <p align="center"> <img width="180" height="180" src="public/logo.png" alt="Jev Studio logo" style="margin-right:20px;"> </p> <h1>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. <div> <a href="https://pypi.org/project/jev-studio/"><img src="https://img.shields.io/pypi/v/jev-studio.svg?color=brightgreen" alt="PyPI version"></a> <a href="https://pypi.org/project/jev-studio/"><img src="https://img.shields.io/pypi/dm/jev-studio.svg?color=blue" alt="PyPI downloads/month"></a> <a href="https://pepy.tech/project/jev-studio"><img src="https://static.pepy.tech/badge/jev-studio" alt="Total downloads"></a> <img src="https://img.shields.io/pypi/pyversions/jev-studio.svg" alt="Python versions"> <img src="https://img.shields.io/badge/License-MIT-blue.svg" alt="license"> <img src="https://img.shields.io/github/commit-activity/m/utk2103/jev-Studio" alt="commits"> <img src="https://img.shields.io/github/repo-size/utk2103/jev-Studio" alt="repo size"> <img src="https://img.shields.io/badge/code%20style-ruff-000000.svg" alt="code style"> </div> </div> ## Badges [](https://glama.ai/mcp/servers/utk2103/jev-studio) [](https://m8ven.ai/mcp/utk2103/jev-studio) ## 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 a judgment condition trips (great for CI gates). **Judgments** - `jev verify` — check claims against evidence. Verdict + probabilities per claim, with a `supporting_evidence` back-reference when there is more than one evidence item. - `jev screen` — flag prompt injection, empty/boilerplate content, and irrelevance before an agent reads text. Recommends `pass` / `review` / `block` / `skip`. - `jev classify` — one label (single), several (`--multi`), or a hierarchy (`--taxonomy`). Confidence-gated `auto` vs `review`. - `jev extract` — pull typed values out of text. Regex proposes candidates, Jev picks, code normalizes. Builtins: `email`, `phone`, `url`, `amount`, `date`, `percent`, `number`. Custom regexes via `name=/regex/:description`. - `jev match` — decide if record pairs are the `same`, `different`, or `unclear`. Feed pairs, one list, or two lists (cross product). - `jev route` — pick a handler for a request and fill its closed-set arguments in one call. - `jev ask` — raw System One passthrough for any state and any questions (repeated `--noul`, `--choice`, `--score`, or `--questions-json`). **Ranking** - `jev find` — rank up to 250 candidates against a plain-language query. Returns top-K and a document-level `answered` / `partial` / `absent` verdict. - `jev rerank` — score each candidate independently and sort. Several can be relevant, or none. **Pipelines** - `jev compact` — shrink an agent transcript by dropping stale tool calls verbatim; recent turns are always kept. - `jev batch` — run a per-row command (`classify`, `screen`, `verify`) over JSONL or newline-delimited input with a bounded worker pool. Emits JSONL, one line per row. **Account** - `jev models` — list the models available to your account. - `jev auth` — `login`, `logout`, `status`. Keychain-first, file fallback. - `jev config` — `show`, `path`, `keys`, `set`, `unset`. Defaults `< file < env < flags`. - `jev update` — check PyPI for a newer release. ### Examples ```bash # Verify a claim against a file jev verify "Helmets are optional for adults" --evidence @ordinance.txt # Screen scraped HTML for prompt injection before letting an agent see it curl -s https://example.com | jev screen --purpose "extract pricing" --fail-on block,review # Classify a ticket in three labels, JSON output jev classify "The invoice total is wrong" --labels billing,bug,feature --json # Extract an email and a date from an invoice jev extract @invoice.txt --want email --want date --context "an invoice" # Rank documentation files for a question jev find "how do I rotate API keys" --files 'docs/*.md' -k 3 # Batch-classify tickets with concurrency 8 jev batch -i @tickets.txt --concurrency 8 -- classify --labels billing,technical,sales # Route a support request to a handler echo "cancel my subscription" | jev route --handlers "cancel:cancel plan,upgrade,help" # Inspect and edit configuration jev config set verify.autoAccept 0.9 ``` ### Exit codes | Code | Meaning | |------|---------| | 0 | Command completed and no `--fail-on` condition matched. | | 1 | Usage, configuration, input, or transport error. | | 2 | Judgment condition matched (e.g. a contradicted claim, injection blocked). | ### Input references Anywhere the CLI takes a value it accepts `text`, `@path/to/file`, or `-` (stdin). Escape a literal leading `@` as `@@`. ### Global flags ``` -m, --model NAME Jev model, e.g. jev-latest or jev-1.13.0 -P, --provider NAME auto | typesafe | openrouter | cloudflare --timeout MS per-request timeout --dry-run print the request that would be sent; don't call the API --json, --md, --format text|json|jsonl|csv|tsv|md --pluck PATH print one field (e.g. label, results[].verdict) -q, --quiet omit the usage/model footer in text output --no-color disable ANSI colors ``` ### Configuration Config file: `$XDG_CONFIG_HOME/jev/config.json` (or `~/.config/jev/config.json`). Env overrides file, flags override env. See `jev config keys` for every settable path. Environment overrides: ``` JEV_PROVIDER JEV_MODEL JEV_TIMEOUT_MS JEV_FORMAT JEV_CONFIG JEV_CREDENTIALS JEV_CREDENTIAL_STORE JEV_NO_STORED_CREDENTIALS JEV_DEBUG=1 # include stack traces on error ``` ## The MCP server: `jev-studio` ```bash jev-studio # speaks MCP over stdio ``` Point an MCP host at it: ```json { "mcpServers": { "jev": { "command": "jev-studio" } } } ``` Exposes: - **Prompt `jev`** — the Jev ruleset as a user message. Optional `mode`: `lite`, `full`, `ultra`. Omit for `full`. - **Tool `jev_instructions`** — same text plus structured output (`{mode, instructions}`) for hosts that pull context via tools. Read-only. ## Develop ```bash pip install -e ".[dev]" pytest ``` Ship to PyPI: ```bash python -m build twine upload dist/* ``` ### Claude Code ``` /plugin marketplace add utk2103/jev-Studio /plugin install prompt-studio@jev-studio ``` Two separate prompts. Start a new session; the ruleset lands in system context on `SessionStart`. Local clone: ``` /plugin marketplace add /path/to/jev-Studio /plugin install prompt-studio@jev-studio ``` ### Codex ```bash codex plugin marketplace add utk2103/jev-Studio codex plugin add prompt-studio@jev-studio ``` ## Try something fun A curated collection of **726 Jev use cases** plus **50 runnable evals** — every build linked to its project and source post. Search it, copy a brief, hand it to your agent. Browse: [jev-directory.netlify.app](https://jev-directory.netlify.app/#) ## Credits The CLI is a Python port of the TypeScript [`jev-cli`](https://github.com/Nasrallah-AL/jev-cli), rebuilt on the standard library with the same command surface and question shapes. ## Contributing See [CONTRIBUTING.md](CONTRIBUTING.md). ## License MIT License — see [LICENSE](LICENSE).