As of: 2026-10-15 23:34 CEST.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/p/2026-10-15-chenglou-handwired/

# Cheng Lou introduces Handwired: turn JavaScript into a neural net

Cheng Lou (@_chenglou), X, 2026-10-15.
Source: https://x.com/_chenglou/status/2110557373651931267

## Why it matters

Launch post of Handwired, an exact, training-free JS-to-neural-net compiler built largely with Claude Code; ~808k views in its first day.

## Summary

Posted Oct 15, 2026 (02:24 UTC): "Introducing Handwired: turn your regular JavaScript code into a neural net! - no training - exact outputs vs the JS program - fully differentiable. All runnable in a browser, without GPU". 807,823 views and 7,990 likes when checked via api.fxtwitter.com on the evening of Oct 15.

## Archived text

> My dear friends, I’d like to show you my latest toy project
> 
> Introducing Handwired: turn your regular JavaScript code into a neural net!
> - no training
> - exact outputs vs the JS program
> - fully differentiable
> 
> All runnable in a browser, without GPU

Archived 2026-10-15 via fxtwitter (unofficial).
Counts: 819,391 views, 8,062 likes, 667 reposts, 337 replies (at fetch time)
Media: https://video.twimg.com/amplify_video/2110557184501440513/vid/avc1/1920x1080/R-bKKcVLQhNm1y26.mp4?tag=29

## Cited in

- 2026-10-15: [Cheng Lou's Handwired turns JavaScript into a neural net](https://postcutoff.com/e/2026-10-15-cheng-lou-handwired-js-to-neural-net/)