DemoBot.dev
Real screenshots of every PR, right in the comments
What it does
DemoBot produces a visual demo of code changes in pull request comments. Verify changes without ever having to checkout branches locally or click around preview deployments.
. --> Free trial First month of Hobby free — no card Screenshot your Pull Requests DemoBot produces a visual demo of code changes in pull request comments. Verify changes without ever having to checkout branches locally or click around preview deployments. To actually see a visual change today, you check out the branch and run it, or dig through a preview deploy to find what moved. Most reviewers don't — so UI changes get approved sight-unseen. DemoBot runs the branch for you and posts screenshots of exactly what changed, right in the PR. Add the GitHub App and choose the repositories you want covered. DemoBot detects your framework. DemoBot spins up your app from the branch, reads the…from demobot.dev
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Launched alongside, August 2026
the whole month →- TL
Life & fun · 10d ago · louisabraham.github.io
- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io
I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 16d ago · simedw.com