Demo gallery

Every demo below runs the real Handwired runtime in your browser — no server, no GPU required. Upstream demos link to Cheng Lou's site.

Which demos run on this site?

★ Ranking from clicks

A search formula learns its weights from 1,000 shoppers while its business rules stay exact; a generic net on the same clicks breaks them.

Layout from a designer's drags

Drag cards to the sizes you want; the sizing function learns its constants and nothing overflows.

Physics from a recording

Fit gravity, drag and bounce to a recorded path, then replay it as code.

Accessible colour themes

A theme learns from a designer's picks while WCAG AA contrast stays exact; a generic net on the same picks fails it.

GPU JSON search (by Cheng Lou)

Upstream's 100,000-document search, embedded with credit: GPU timings next to plain JavaScript.

Beginner lesson: the cat is a neural net

A 7-step lesson. A tiny JS rule becomes an exact neural net; try to break it, then watch it learn new constants in its own code, next to a regular net.

Soft switch

The README's a > 4 ? 10 : 12 as two ReLUs and a select. Editable a, branches and live plot.

Exact comparison explorer

Pick a relation, toggle the integer grid, fuzz 5,000 random pairs against plain JS.

Code → network graph

Visualize the operations and layers behind a select, a comparison and an exact clamp.

Unfreeze & train

Start from the exact program, then fit its threshold, slope and branch values by gradient descent.

Toggle switch template

Upstream's template/ app: a spring-animated switch run as one numeric program.