Jev directory
CommunityJev Repos & SDKs
@typesafe-ai/sdk
The official JavaScript and TypeScript SDK for the TypeSafe API, at version 0.7.0: typed Choice, Score, Noul, and box questions, experimental image inputs, and zstd request compression on Node.js 22.
- Reading time
- 2 min
- Published by
- Community
- Author
- TypeSafe AI
- Last verified
- Oct 2026
- Languages
- TypeScriptJavaScript
- Platforms
- API
- Capabilities
- Open sourceRequires API key
Highlights
- MIT-licensed, version 0.7.0; ships ESM, CommonJS, and TypeScript declarations for Node.js 22 or newer.
- systemOne() sends one state with named choice, score, and noul questions; answer types are inferred from the questions.
- Image input is experimental and opt-in via the TypeSafe-Danger-Zone-Images header; only PNG and JPEG bytes are accepted.
- box() questions require the jev-preview model and return edges as fractions of height and width, with confidence that may be null.
- Request bodies of 1 KiB or more are zstd-compressed on Node.js 22.15+; compression: false disables it entirely.
Watch out
The README shows no pricing, latency, rate limits, or benchmarks, and image support is flagged experimental behind an opt-in header. Calls need a TypeSafe key and the licence covers the client only; check the TypeSafe docs for current models and limits.
Questions about this entry
Short answers drawn from the linked project or page.
The official JavaScript and TypeScript client for the TypeSafe API. Create a TypeSafeClient with TYPESAFE_API_KEY set, send a state plus named questions, and read typed answers such as response.answers.category.choice.
Run npm install @typesafe-ai/sdk on Node.js 22 or newer. The package ships ESM, CommonJS, and TypeScript declarations, and zstd request compression needs Node.js 22.15 or newer; other runtimes send bodies uncompressed.
choice() picks among named options, score() places the state on an ordered rubric, and noul() returns a probability for a yes/no statement. box() locates a region and requires the jev-preview model.
Opt in with the TypeSafe-Danger-Zone-Images header, then place image() values in the content, in withAssets templates, or in assets keyed by reference. Only PNG and JPEG bytes are accepted; WebP and GIF are rejected with a BadRequestError.
Bodies of 1 KiB or more are compressed with zstd when running on Node.js 22.15 or newer; smaller bodies fit in a single TCP segment and are sent as-is. Pass compression: false to disable compression for every request.
Use the jev-preview model for box() questions. The answer holds top, bottom, left, and right as fractions of the image's height and width, and confidence is null when the API does not report one.
No. The README documents usage and options only; pricing, token limits, and current model names are not stated here. The package links to docs.typesafe.ai and to its own client and types source for API options and defaults.
Reactions & coverage
Posts, threads, and videos about this entry from around the web.
X: A doorbell camera on Jev 1.14
More Jev resources like this
A typed TypeScript client for Jev System One models that sends a state plus Choice, Score or Noul questions to POST /v1/systemone and returns typed answers, with presets for TypeSafe, Zen and custom gateways.
Jev Repos & SDKs#community#github#typescript
Community
sc0d3r/jev-systemoneTypeScript
sc0d3r/jev-systemoneTypeScriptA Python library that turns Jev-style decision models into ordinary function calls: check returns a bool, classify picks one option, label picks every option that applies, and score rates on a scale, with probabilities behind every answer.
Jev Repos & SDKs#community#github#python
Community
jlowin/vibecheckPython
jlowin/vibecheckPythonRuby gem that makes System One measurement a language primitive: psi prepares a state, judge/choose/score return calibrated distributions, and ? collapses them for control flow. Ships TypeSafe, protocol (/v1/systemone) and CUA providers behind one interface with its own spec suite.
Jev Repos & SDKs#community#ruby-gem#sdk
Community
innocentdiaz/s1_rubyRuby
innocentdiaz/s1_rubyRubyProbabilistic control flow for TypeScript: Hunch asks a System One model such as Jev yes/no questions, thresholded booleans, picks and ratings, and returns typed answers you can branch on in ordinary code.
Jev Repos & SDKs#community#catalog-import#cobanov
Community
carldaws/hunch-tsTypeScript
carldaws/hunch-tsTypeScriptTyped semantic decisions for TypeScript: ask Zod 4 or native question batches about your data and get validated answers through async/await or Web Streams, with confidence gates, retries, replay and observability. Jev runs via TypeSafe AI or Vercel evaluation.
Jev Repos & SDKs#community#catalog-import#logicrw
Community
nitoba/questionsTypeScript
nitoba/questionsTypeScriptA TypeScript-first toolkit billed as the standard library for System One models: ready-made classify, extract, pickOne, rank and verify methods, a service-agent runtime that runs conversations turn by turn, and a one-message order parser. A Python port is in preview and the project is in alpha.
Jev Repos & SDKs#community#github#typescript
Community
Engid/question-kitTypeScript
Engid/question-kitTypeScriptFrom the Jev guides
Original write-ups on what this entry is for.
From the Jev AI model community
Posts from builders shipping with Jev right now.