Contribute knowledge — not just files.

How contribution works

Five plain sentences.

1. Bring a source or knowledge. A book, an open article, your own notes, a correction, a topic map.
2. We first check whether it is already known. On your device, before anything is sent.
3. We determine what the rights allow. Per source, per licence — recorded as a rights profile.
4. Useful knowledge can still be contributed even if the file cannot be shared. Metadata, mapping, reviews, original explanations.
5. Accepted community material stays linked to its source and rights status. Always.

Central principle

Contribution ≠ file upload.

Most valuable contributions are not files at all. All of these count, each with its own review and its own credit:

If a copyrighted book cannot enter the Community Library, the answer is never just "rejected". It is: "We cannot add this file to the Community Library, but your knowledge contribution can still help." — add metadata · review · classify · map topics · create original learning material.

When a file itself can be hosted

Accepted file bases (future).

A normal purchased, copyrighted book is not automatically eligible for file hosting. Its metadata and a legal link are still a real contribution. What you may keep for yourself in a future My Study Space is a separate, rights- and jurisdiction-dependent question.

Contribution lifecycle · scripted demo

Pick an example and step through it.

Four prepared examples. Nothing is uploaded — every step is scripted to show how the real lifecycle would decide. Submitted ≠ public: a file never becomes Community Library content just because someone selected it.

1. 1Discovered—
2. 2Local duplicate pre-check (fingerprint in the browser)—
3. 3Submitted — not public—
4. 4Quarantined — held, invisible to the library—
5. 5Duplicate check (3 levels)—
6. 6Rights check → rights profile—
7. 7Quality check (human review)—
8. 8Accepted / not accepted → credit only if accepted—

Duplicate check

Three different questions, not one.

SHA-256 does not settle the question of two different scans of the same book. That is Level 3 work — future, server-side, and reviewed by people.

Optional · real, local, tiny

Try the local pre-check yourself.

The product principle: the first exact-duplicate fingerprint is calculated in your browser, before any submission. This tool does exactly that — it reads the file on your device, computes a SHA-256 fingerprint in a Web Worker so the page stays responsive, and compares it with a synthetic two-entry demo catalog. The file never leaves your device; this page has no upload at all.

Doctors and experts

Professional contribution is first-class.

A doctor, specialist or researcher can — in the future — contribute:

A professional credential and the correctness of a piece of material are two different things. Expert contributions go through the same review as everyone else's — credentials add a signal, not a shortcut. Credential verification is not implemented in this prototype.

XP and Trust

Trust is not a single score.

XP grows with learning and activity. Trust is a category, not a number: the future reputation model is multi-signal, and no signal is shown as one public figure like "Trust 87".

In this prototype: no real scores, no profiles, no leaderboard.

Playful, not addictive

Reward learning and verified contribution — not file volume.

A contribution reward exists only after a useful, confirmed result. Raw submission earns nothing.

Badges (concept)

What this game will not do

Two legally different things

Accepted ≠ trainable.