Leonard Koch

If it doesn’t have cringy AI artwork is it even a real Substack?

i think the @react.dev Compiler team could include more of this type of messaging. i'm being a bit inflammatory here (and Haskell may not the best analogy), but the principle of "pure things are safe to move around" is fundamentally simple and has been known for decades. teach it to new generation!

I couldn’t solve a problem in my app, so I asked an ai to write code that asks another ai to solve it for me.

TC39 Proposal: ai-hallucinate-properties-of-null

🌚 youtu.be/kPIdRJlzERo?...

Two days until Sanderson’s Wind and Truth and I’m really excited to spend December reading it. Probably losing some sleep for it too 😄 If you like Sanderson as well, what else would you tell me to read?

Lmk what you think

That wonderful feeling when you start a new project and the codebase doesn't _yet_ have any of those terrible mistakes you're about to make.

I’ve decided that cute dogs aren’t just for instagram. Hugo who’s just woken up from a nap fits in on Bluesky just as well!

react@19.0.0-rc1 is out today with a replacement for sibling pre-rendering. Give it a try and maybe we can ship React 19 soon? github.com/facebook/rea...

The thing that really differentiates Bluesky is that it doesn’t feel like it was designed by a bunch of people who will lose their jobs if I spend a little less time on Bluesky.

Ever since iOS 18 Siri has been gaslighting me. Noise cancellation: *Being very much off* Me: "Hey Siri, turn on noise cancelling" Siri: *Turns noise cancelling on* 😏 Siri: "Noise cancellation is already turned on" 😜 ...

new blog post: React Native, and “the native feel”