Come join us for the second edition of the Effect Berlin Meetup, on Thursday, Jan 29 at 6pm. Effect is the missing standard library for Typescript, and makes writing functional and production-grade code easier. Come learn more or share your experience! luma.com/xdpn0t7a @effect-ts.bsky.social

www.effect.institute is the coolest course I ever took. Big props to the @effect-ts.bsky.social team for that level of creativity!

It’s weird that water became THE issue for why many people (publicly) dislike AI. Of all the concerns about AI use, even just limiting it to environmental concerns, water use is generally one of the least important. But when I speak with people, especially younger ones, water usually comes up first

Happy New Year! 🎉 As we step into 2026, here’s a look back at what shaped Effect in 2025: We gathered in person at Effect Days in 🇮🇹 Italy & the community hosted meetups across: 🇫🇷 Paris & Nice 🇩🇪 Hamburg, Munich & Berlin 🇺🇸 NYC & SF 🇮🇹 Milan, Sardinia & Sondrio 🇦🇹 Vienna 1/

Is your transit agency "succeeding"? It depends on the definition of success, and not everyone agrees on that. Here's my timeless article on this, just now updated a bit. humantransit.org/2018/02/basi...

Please repost to get the word out! @nkgarg.bsky.social and I are excited to present a personalized feed for academics! It shows posts about papers from accounts you’re following bsky.app/profile/pape...

Finally came around to reading @samwho.dev's article about prompt caching which - turns out - is only around 10% about prompt caching because in order to understand it you need a good idea on how LLMs work 😆 As per usual Sam nailed it 👏🏻👏🏻 Thanks for the great insights! ngrok.com/blog/prompt-...

don't worry guys I'm sure everything will be fine

The kids are alright.

i wonder if "poisoning the ai" has ever worked at all or if it's one of those folk wisdom things like use this ointment to scare the copyright infringement demons

For You nearing 20k likes is so well deserved, you love to see it

I built a new Python CLI tool called claude-code-transcripts that can create nice readable HTML versions of your Claude Code sessions, both local and pulled from Claude Code for web, and makes it easy to publish them online too simonwillison.net/2025/Dec/25/...

Fwiw I think this is actually backwards. My experience with LLMs has been that they are actually*incredibly* good at precisely this thing, and that this may in fact be one of their most beneficial aspects.

If you want to know more about why California resisted building housing (spoiler: racism) and why it's finally starting to, you should read this piece by @jetjocko.bsky.social www.motherjones.com/politics/202...

Every time I see the mac System Information icon all my brain thinks is: Onigiri

The fun thing about the AI as dotcom crash metaphor is that it's bullish for AI. While companies like Webvan, Kozmo & Pets. com failed - today we have Amazon, DoorDash & Chewy. We also have Netflix, TikTok, Uber and lots of other companies we couldn’t have imagined in 2001. AI will be similar.

I wrote about how I've been having a ton of fun cooking with LLMs recently - including having Claude take a photo of two recipe cards and vibe-code me up a custom timer application to help me prepare two meals at once simonwillison.net/2025/Dec/23/...

Remember the dotcom bubble and what happened to the internet after that? The AI bubble may well pop in 2026 but if you expect that it will bring the end of AI you’re gonna be sorely disappointed.

To be sure there’s real debate about whether GenAI is worth the cost (in the academic lit see Humlum and Vestergaard 2025), but it’s quite sad that more people don’t have the same doubts regarding cattle “farming.”

endlessly interesting to me that people think this first claim is true. why? I tend to think it’s mostly because RLHF’ed outputs with weak prompting are generic

According to NASA, leopard print is evidence there could once have been life in New Jersey.

Garlic NaN