"Tests are no longer even remotely optional" (c) Simon Willison
If anything, AI-assisted development made me more strict about testing, not less.
AI can generate 200 lines in seconds. Without tests, you have no idea if any of it actually works — and neither does the AI.
No excuses. Write the tests.
I'm not vibe coding. I review every line.
But even then, a simple "let's reflect" at the end of the session surfaced better rules, docs, and agent configs I'd have missed.
The reflection habit matters regardless of how much you trust the AI.
Do you do this? 👇
I wish I could acquire skills as quickly as Claude can :)
youtu.be/CEvIs9y1uog?...
"harness engineering" - It is the idea that anytime you find an agent makes a mistake, you take the time to engineer a solution such that the agent never makes that mistake again. (c)
Interesting AI Adoption Journey by Mitchell Hashimoto
mitchellh.com/writing/my-a...
Whether coding is solved or not, I am not sure, but this video definitely changed the way I develop
#ai
youtu.be/We7BZVKbCVw?...
🆕 Build AI-powered apps with Kotlin and Spring AI.
Follow a hands-on tutorial series covering text and image generation, text-to-speech, embeddings, and RAG – all on a pure JVM stack.
Get started 👇 https://kotlinlang.org/lp/kotlin-spring-ai-tutorial/
Programming a programming language sounds odd, we’re used to programming with one, not building it. But after watching this, I must say working on @kotlinlang.org must be pretty cool. In the end, you’re building a product exclusively for devs… and now for AI agents 🙂.
youtu.be/ZggUn2mNqMU?...
I wrote a piece for the trivago Tech Blog about how mob programming can turn a team into… well, an actual team.
If you're into collaboration, dev culture, or just curious:
Meta Quest Store saw 12% faster loads & 2.5× faster interactions with #React Compiler. ESLint and React violations looks solid too
I'm skeptical, but definitely going to try it out. Auto-memoization without manual useMemo/useCallback sounds promising.
react.dev/blog/2025/10...
What’s new in #JUnit 6: Key Changes and Improvements
In big codebases, duplicate logic hides everywhere, especially when you are new to a project. AI can now help us spot and prevent those clones before they grow into tech debt.
In the age of #AI and AI-powered IDEs, we should get used to asking questions like:
👉 “Is there a function that already does this?”
👉 “Which part of the code handles that?”
👉 “Did I just duplicate something?”
I was excited to discover #Redis numbered databases… only to learn the same day they are widely considered a mistake. I wonder if anyone is actually using them in production
Munich it is then! ;)
Out of curiosity, I ran some offline LLMs on my Raspberry Pi 4. Building from source was fun, and watching it struggle to squeeze out a word per second, even with the smallest models, was oddly satisfying. It met my low expectations perfectly 😄
#raspberrypi #llm
Just watched @gergely.pragmaticengineer.com’s “Software engineering with LLMs in 2025: reality check.” Clear, grounded look at how AI-coding tools are used day-to-day. Loved the four wrap-up questions!
youtu.be/EO3_qN_Ynsk #llm #ai
For some reason the gif is just an image :( @bsky.app
GIF recorded in IntelliJ Kotlin Notebook. A kaomoji face slides left-to-right and back, driven by a Kotlin ANIMATE(0.2.toDuration()) block that updates the output every 200 ms
🌀 Tried Kotlin Notebook’s `ANIMATE {}` today and got totally sucked in.
First plan: shiny data plots.
Actual result: a roaming kaomoji ( ͡~ ‿ ͡~)
Bottom line: with a bit of code, #kotlin notebooks move more than just data.
3 years in a row, I attended @kotlinconf.com, always inspired by the quality and the community. This year, I had the privilege of speaking there myself.
🎥 www.youtube.com/watch?v=434W...
Also happy that I got to bring deltaration.com to the spotlight 😊
#ai #boardgames #kotlin
Wrote short article about use of Koog for developing Kotlin based AI agents (combined with a number of MCP servers).
The example included is based on use of #BuildWithGemini LLM (really had to use that with #GoogleIOConnect fast approaching 😀) johnoreilly.dev/posts/kotlin...
It does not seem this way when adding bools, but when an extra value has to be added to boolean, I want to go back in time
A quick reminder. We all know not to click links on emails from unknown sources. Spam is an unknown source. The "unsubscribe" link is a link from an unknown source. Even a "known" sender can be spoofed. Just send it to Spam (or at least thoroughly vet the URL before clicking). Just sayin'.
Had an inspiring two-day exchange with the #trivago tech crew in the Netherlands! 🚀
Huge thanks for letting me join the lineup.
Special thanks to everyone who packed the room for “Mob Programming: Smells Like Team Spirit.” 🙌🔥 Your questions and hallway chats were the best part.
And if you by chance have the same problem, test out my fix, hope it saves you some time: askubuntu.com/a/1549957/22... 8/8
Tiny story, big win: Embrace the inconvenience, let it challenge you! And don’t forget to take those vacations (or workations) whenever you can. 7/8
I ran the final steps on the work laptop, boom, camera alive on the first try 📸✅. Today, everyone can see me and… how unlucky I am with the weather 🙄☁️. 6/8
So last night I dove into three-and-a-half hours of Googling, installing, purging, rebooting 🧑💻, chatting with GPT, rinse, repeat. Just when I was about to give up, I opened Google Meet and saw my bleary face staring back. Victory! 🎉 5/8
Then I headed off on a workation 🌴💻. I forgot to pack an external cam, figured I’d survive… until I saw my calendar packed with meetings and an interview. 4/8
