What is the S1 Studio sandbox?

An open-source, vendor-neutral web UI sandbox for testing structured decision models that speak the /v1/systemone protocol, with probability diagnostics for Choice, Score and Noul answers, A/B endpoint comparison and SDK export.

Which endpoints does it support?

Built-in templates cover local Ollama at localhost:11434 with clef or clef-flash, Ollama Cloud at ollama.com with clef:cloud, TypeSafe AI at api.typesafe.ai with jev-1.13.0, and any custom endpoint; a built-in simulator needs no connection at all.

What is the built-in sandbox simulator?

A mock endpoint at /api/mock-systemone that lets you experience full probability distributions and the tool's polarization warnings without connecting to any external service, useful for testing the UI or for demos offline.

How does it get around CORS?

Two send modes: Direct sends fetch calls from the browser for local Ollama, while Proxy forwards through a stateless /api/proxy that is a Next.js API route locally and becomes a Cloudflare Edge Worker when deployed to Cloudflare Pages, keeping no payloads or keys.

What can I send as state?

Text or JSON with CodeMirror 6 syntax highlighting and live format checks, sending a JSON object or array rather than an escaped string, plus images via drag and drop or clipboard paste in PNG, JPEG or WebP with base64 prefixes stripped automatically.

What are the input limits?

Images are capped at 4 per request, 4 MiB or 16 megapixels each and 8 MiB total, and the questions builder supports up to 64 questions per request with live validation of question keys.

What does the digest not show?

The captured README cuts off inside the questions-builder section, so the A/B comparison, SDK export, install instructions and license terms are not visible; the repo has 0 stars and was pushed the day before this review.

Jev directory

CommunityJev Tools & CLIs

S1 Studio

An open-source, vendor-neutral web UI sandbox for /v1/systemone structured decision models such as TypeSafe Jev and Ollama clef: visualize Choice, Score and Noul probabilities, compare endpoints A/B, and export SDK calls, with a built-in mock that needs no network.

See highlights Open github.com

Stars: 0
Language: TypeScript
Reading time: 2 min
Published by: Community
Author: doggy8088
Last verified: Oct 2026

doggy8088/s1-studio

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S1 Studio — 開源的 /v1/systemone 結構化決策模型 Web UI 測試沙盒（支援 TypeSafe Jev、Ollama clef / clef-flash 與自建端點的 Choice / Score / Noul 視覺化機率診斷、A/B 端點對比與 SDK 匯出）

Forks: 0
Last pushed: Updated Oct 2026

Repo stats from the GitHub API, cached Oct 2026.Homepage

Tagscommunity github nextjs ollama sandbox

Works forJev for Evaluation Jev for Classification

Used inJev for Software & DevTools

Languages: TypeScript
Platforms: Next.js Cloudflare Browser
Capabilities: Open sourceSelf-hosted

Highlights

Vendor-neutral web UI for any /v1/systemone model: TypeSafe Jev, Ollama clef and clef-flash, or custom endpoints.
Built-in simulator at /api/mock-systemone returns full probability distributions and polarization warnings offline.
Direct and proxy send modes; the proxy becomes a Cloudflare Edge Worker when deployed to Cloudflare Pages.
State supports text or JSON with CodeMirror 6, plus images: 4 per request, 4 MiB each, 8 MiB total.
Questions builder allows up to 64 questions per request; the TypeSafe template targets jev-1.13.0.

Watch out

README (Traditional Chinese) and GitHub metadata reviewed 2026-10-17; the captured excerpt cuts off inside the questions-builder section, so the A/B comparison, SDK export, install steps and license are not visible; the repo has 0 stars.

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S1 Studio

Highlights

Questions about this entry

What is the S1 Studio sandbox?

Which endpoints does it support?

What is the built-in sandbox simulator?

How does it get around CORS?

What can I send as state?

What are the input limits?

What does the digest not show?

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