Josh Pullen

If you can solve a previously unsolved problem, you’re going to have a much easier time getting users than if you build an incrementally better version of something that already exists. www.joshuapullen.com/blog/make-so...

This post is so useful and wise that I've been referencing it for over 20 years. slashdot.org/comments.pl?...

(generating certs for my root CA) ok now let's do a silly one

Oh my god Nathan fielder is a genius

This official @developers.google.com page is linking directly to @npmx.dev. So nice!! 💯

Playing around with an idea: responsive code. The build script creates up to 5 versions of each code sample using Prettier, and a container query displays the right one. Brotli means the filesize overhead is very small. Live demo: jakearchibald.com/2026/css-cus...

CSS reacts, JS just listens. @nerdy.dev’s prop-for-that library exposes runtime state to CSS through custom properties: pointer position, scroll velocity, battery, viewport, and 16+ more, no event handlers needed. #css #js prop-for-that.netlif...

I GOT THE DOMAIN! I FINALLY GOT IT!!!!!!!!!!1 🥳🎉 Paint​.NET is now at paint.net! Well, it will be just as soon as I push all the buttons to migrate content and set up redirects from getpaint​.net etc. For now it's just a "hey go here" redirect page.

I haven’t gone back and I don’t miss it

API design is so freaking hard. Over the course of adding HLS support, I've redone the new API about 5 or 6 times by now. Sometimes you literally first need to see how Variant A feels before you know Variant B was better all along. And knowing you can't change it after release!

The new @codepen.io compiler seems very good. They've brought so much clarity to a messy ecosystem of tools.

Vertical jobs—where you end-to-end solve a problem—seem more stable right now than horizontal jobs, where you specialize in doing one slice of a process.

Just deleted my ChatGPT account. I'd rather use an LLM from a company that aligns with my values. I don't support mass surveillance or AI weapons without a human in the loop, and OpenAI does. The decision was made easier by just how good the other LLMs are. We are spoiled for choice!

Four months later, AI agents have crossed a threshold. They're a permanent part of my toolbelt now.

Stellar article. I’m still excited about building realtime math collaboration even though I mostly agree with the takeaways.

Those things change often but are also low effort so I don't consider it a waste of time. Aside from that, agents really like using CLIs, so investing in that makes sense, I don't know if you saw what Hono was doing or not: blog.yusu.ke/hono-cli/

I wrote about the most ambitious form of AI-assisted software development I've seen yet - Strong DM's "Software Factory" approach, where two of the guiding principles are "Code must not be written by humans" and "Code must not be reviewed by humans" simonwillison.net/2026/Feb/7/s...

What are the best @standard.site reader apps? I want to subscribe to everyone's blogs!

Been mulling over @bnewbold.net's recent post on community spaces and atproto's next frontiers. I wrote about why building for organizers (not just users) might be the key to making it all work.

@danabra.mov I'm struggling to grasp how a user's ATProto identity can survive changes in domain/hosting/etc without too much centralization on the registry. As far as I understand, it seems like the registry just... is? Centralized? Maybe it's fine. But I'm curious if you have more insight.

I'm in the tunnel 😔 You know you’re entering a dark tunnel when the upcoming section of a project… - Will take a long time - Has no clear benefit or visible progress until it is completely done - Has no obvious checkpoints or progress markers until it’s done www.joshuapullen.com/blog/working...

There is a dichotomy of UI elements. Some elements are a part of your component tree. Cards, form elements, carousels, etc. Some elements don't make much sense as a part of a component tree: toasts, dialogs, alerts. Those are side-effect elements.

LLMs automate typing, not thinking. Mikayla Maki shares her mental model for working with agents, and how she puts it into practice: zed.dev/blog/on-prog...

Working on multiplayer for my math input library, heading down the CRDT rabbit hole I don’t think anyone has solved math multiplayer? Which is crazy because it can’t be that hard… is what I keep telling myself

👎 Coding agents 🤩 Tab autocomplete

I updated to MacOS 26 and absolutely love it. Much more than I thought I would!

I don't think icebreakers build community in a classroom nearly as much as authentic opportunities for collaboration early and often to begin the school year. Students know when it's just a first-week thing, right? Here's what I prioritize instead: thebrokencopier.substack.com/p/building-a...

I just discovered "story tables" from a Knowles fellow and I LOVE them for teaching algebra storytables.substack.com/p/sowhat-is-...

Found a really great project made by a math teacher @pulljosh.com called shufflebuddy.com Its a great way to arrange and randomize your class roster into a seating chart. Lovely feature to add rules for restricting A and B from sitting or tagging certain students to a specific spot. #EduSky

I need to stop making Shuffle Buddy better. Getting the word out is working and it's FUN. www.joshuapullen.com/blog/stop-im...

I got engaged! I love you Jessika ❤️ www.joshuapullen.com/blog/she-sai...