Today I Learned

I just stumbled upon some open lectures from Stanford. It’s so crazy good that education like this is publicly available nowadays. One of them was about LLM training and the technology behind it. Transformers are the thing powering basically every modern AI model. You give them text, they break it into chunks, and then figure out how every word relates to every other word all at once. That context-awareness is the whole trick. It's why the model "gets" what you mean, not just what you typed. Stack enough of those layers on top of each other, train on enough text, and you get something that can predict the next word surprisingly well. That's it. That's the magic. At least to some degree.

I just stumbled on Codepen 2.0, which is currently in beta and it's finally a very modern way to build short little prototypes. I just love this way of working and I already picked it up around university time to build front-end focused experiences or little component snippets and make them easily shareable. Still looking for a good way how to combine that with an agentic workflow, but for now Codepen 2.0 feels pretty epic.

I started playing tennis last year in September. I'm playing somewhat regularly right now and had my first ranked match yesterday. I lost it very closely in the champions tiebreak. I'm quite happy with my performance, but when you watch Roland Garros in the evening, this felt like a completely different sport. I love tennis, but I also learned that it takes a long time and a lot of discipline just to be somewhat average. Keep on grinding!

During my vacation in Japan this month, I learned how deeply the Edo (1603–1867) and Meiji (1868–1912) eras still define the nation. This contrast really becomes incredibly present as you travel through different regions. Moving from the preserved samurai districts and quiet temples of Kyoto or Kanazawa (the isolated, traditional Edo era) to the westernized red-brick architecture and bustling port vibes of Yokohama or Kobe (the rapid modernization of the Meiji era) shows how beautifully Japan blends its secluded past with its industrial leap forward.

I cannot write prompts when I’m tired; the output is poor. For my side projects, I have found a different workflow that better suits my needs. I plan throughout the week, refine the plan from Monday to Friday, and then implement it with intent. This approach provides me with greater clarity and, more importantly, time to consider whether the project is truly worth building. Much of this thinking time does not occur at my desk!

I just stumbled over the fact that Command + Shift + 1 is actually a Macintosh shortcut to eject floppy disks. Well, I guess in 2026, nobody's using floppy disks anymore. That's why it's pretty safe to reassign that shortcut. I set it to capture text on my screen with CleanShot because this is one of my most favorite use cases. And hell yeah, this workflow feels good.

I love the convenience of applications like Conductor and the user interface on top of agent orchestration. However, I've recently found myself returning to the files, tweaking CSS, and adjusting pixels with small increments through many iterations. This workflow often disrupts my context in agent windows. I appreciate the new agent window from Cursor, and the transition to the editor window has become a workflow I truly enjoy. I start and plan with the agent, then iterate in the editor. It's the best of both worlds.

Copernicus is a space program from ESA and is focused on Earth explorations. The cool thing is that there is a newsletter that shares an image from Copernicus with you every day and it always has a nice connection to current happenings in the world. And it's a really nice newsletter that I love to enjoy every morning. Copernicus image of the day

I recently heard somebody sharing a very interesting prompt: Let's step back and think really hard: how can we make this simpler and dumber while still achieving our goals? This is such a good addition to my workflow and I'm using it 20 times a day.

In one of the recent "How I AI" podcasts, I came across a slide that intrigued me and sparked my thoughts. Now, I constantly wonder if this is truly worth my attention and whether I will improve tenfold if it genuinely delivers ten times the impact.

I always thought, based on the name, that it was a Japanese creation. However, it was actually developed by an American architect in 1979 and called "Number Place." Japan simply rebranded it and made it popular. Playing it regular recently and it’s such a fun little thing to do!

Figma keeps track of the last typography style you interacted with, which might seem simple but is quite useful. This means that by clicking on an existing text field that uses the desired style, I can speed up my workflow significantly. I just hit T and start writing, rather than writing first and then switching the style afterward. Little things like this add up.

I’m a sucker for keyboard shortcuts. One of my favorite new ones is the hyper key (✦), which basically combines ⌃⌥⌘⇧. Yep, that’s impossible to press. I combined it with Raycast, mapped it to my Caps Lock key, and assigned it to a bunch of commands to open apps. ✦F = Figma, ✦S = Slack, etc. Timesaver and endless possibilities!

I just stumbled over life-os by Gabriel Vadivia. It’s a super interesting, markdown based knowledge base, journal and diary and looks very interesting to me. I struggled a lot with creating something like this because I really overthought the folder structure. Just letting Claude run and maintain that in the background sounds so good.

I'm currently building this TIL section within Notion because it's just the easiest and most convenient for me. But every new entry requires a redeploy. I now set up a custom script with a redeploy hook on Vercel so I can redeploy my website just with a Raycast command. Big time saver.

I’ve been quite enthusiastic about keyboard shortcuts lately. I looked for a way to reactivate the mini player in the Dia browser while watching a video with another tab active. It turns out that pressing "I" on your keyboard in YouTube activates their mini player. This also resolved my Dia issue!

I stumbled upon the Chrome DevTools MCP and set it up with Claude Code. It's especially useful for making small updates or running experiments on an existing page. This feels great. Currently, my biggest challenge is making quick iterations on existing pages with AI when I don't have direct access to the code. This remains a significant issue in large companies, where there's a clear separation between designers and developers, or in unconventional agency setups. Overall, this is a pretty cool solution. Now I just have to make it persistent somehow.