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Interactive explorer and Jev question workspace for Jev Board datasets.
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CommunityJev Demos & Experiments
Jev Board Lab
Browser-first workbench that turns selected CSV rows into Jev judgments: up to 20 Noul, Choice and Score questions per row, with the file parsed in memory and requests proxied through a Cloudflare Worker.
- Stars
- 0
- Language
- JavaScript
- Published by
- Community
- Author
- WebGrga
- Last verified
- Oct 2026
About this project
A browser-first interface for turning CSV rows into structured Jev judgments. No CSV or generated dataset is committed with the project. A selected CSV is parsed into memory inside the browser. The file is not uploaded, saved, or persisted by the frontend. Each explicitly selected row becomes one JSON state when the user clicks Run Jev. Only that state and the user-defined questions are sent through the Cloudflare Worker to TypeSafe.
Quoted from the project's README. Read the full README.
Works forJev for Classification
Used inJev for Software & DevTools
- Languages
- JavaScript
Highlights
- Up to 20 independent questions run against each selected row, with the frontend capping a run at 25 rows and 3 concurrent row requests.
- The CSV is parsed into memory in the browser and never uploaded or persisted by the frontend; only the row state and questions reach the Worker.
- The Worker keeps TYPESAFE_API_KEY server-side and validates and forwards requests without storing or logging their bodies.
- CSV import and question editing work from any static file server opening index.html; only live inference needs the Worker.
Watch out
This is two pieces of hosted infrastructure plus a gate to configure, not a static page you can drop anywhere: Netlify publishes the frontend, a Cloudflare Worker holds the key and forwards inference, and an RG Lab hub proxies /jev-board/ to the site and /jev-board/api/* to the Worker. The site is password-protected rather than open, with a PROTECTED_PAGE_PASSWORD set in Netlify under the Functions scope and the same value plus the Jev key stored as encrypted Worker secrets; refreshing the page clears the loaded file and results, so there is no session to come back to. Limits are frontend caps rather than API guarantees: 25 rows per run, 3 requests in flight, 20 questions, and Score restricted to 2 through 10 ordered descriptive levels. The optional node scripts/transform.mjs converter is explicitly for local debugging and its data/ output is gitignored and must not be deployed. The README does not document a batch API, cost per row, CSV size or encoding limits, or how Choice answers map into an exported label column. Copy reviewed against the repository README on 2026-10-04, not from running it.
Questions about this entry
Short answers drawn from the linked project or page.
Not as far as the frontend is concerned, and the README is specific. A selected CSV is parsed into memory, and the file is not uploaded, saved or persisted by the frontend. Each explicitly selected row becomes one JSON state only when you click Run Jev, and only that state plus your questions go through the Worker to TypeSafe; the Worker validates and forwards requests without storing or logging their bodies. What reaches TypeSafe is therefore your row content, so treat the questions you write as disclosure.
Serve the directory with any static file server and open index.html. CSV import and question editing work with no backend at all; only live Jev inference requires the Worker. For local debugging there is an optional converter, node scripts/transform.mjs, which turns a CSV into JSON, and its data/ output is gitignored and explicitly must not be deployed.
The site fails closed behind a Netlify Edge Function password gate. You set a long, unique PROTECTED_PAGE_PASSWORD in Netlify with the Functions scope and redeploy, then set that same value and TYPESAFE_API_KEY as encrypted Worker secrets rather than in source control. Login creates a signed, secure, HTTP-only cookie that expires after 24 hours, the edge gate blocks the entire frontend when the password is missing, and the Worker independently rejects unauthenticated inference requests.
The frontend limits a run to 25 rows with at most three row requests in flight, and you can define up to 20 independent questions that run together against each selected row. Score questions take 2 to 10 ordered descriptive levels, Choice takes an option map with probabilities and confidence, and Noul returns the probability of yes. Export of the resulting labels is not documented in the README, and neither is cost per row.
GitHub stores the frontend, Worker and configuration together; Netlify publishes the static frontend; the Cloudflare Worker keeps TYPESAFE_API_KEY server-side and forwards inference; and the RG Lab hub proxies /jev-board/ to the Netlify site and /jev-board/api/* to the Worker.
No. Refreshing clears the loaded file and results, so there is no session to return to; the frontend never persists the CSV, which is parsed into memory and becomes one JSON state only when you click Run Jev on a row.
Treat main as production: make future changes on branches and merge them after review. That is the repository's own deployment note, and the frontend, Worker and configuration are all stored together in GitHub.
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