I was a #Rails senior developer, #Javascript enthusiast, web technologist. Now I am a "Energized Maker" and a loving father of two.

Hamburg, Germany
Joined March 2007
Does anyone else miss the old Railscasts format? I do — so I'm bringing it back. Short, focused Rails screencasts, no fluff, on things that matter today. Episode 001: model validations — validates, normalizes and a unique index. youtu.be/PI7YSl2Sq4I More coming. What should I cover?
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Modern vacation style: While the web is scrambling over the critical PHP RCE vulnerability, I just let my Hermes Agent handle the server repairs. 🤖🛠️ All PHP installations completely patched in minutes while I was relaxing by the pool. Automation is the ultimate vacation hack! 🏖️🍹
Today we disclose PHP2Shell - remotely exploitable memory corruptions in PHP WordPress pre-auth RCE: ✅ Drupal pre-auth RCE: ✅ Joomla pre-auth RCE: ✅ Remote memory disclosure of any PHP application: ✅ Read more ⬇️🧵
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Mathias Karstädt retweeted
I'm on my quest to destroy the Adobe empire. ✅ Phase 1: Build ImageFlow to compete with Photoshop ✅ Phase 2: Ship Photoshop Beta features like Relight → Phase 3: Build things Photoshop doesn't even have We just entered Phase 3. Relight can now turn a light into a sun + cast patterns through it. Palm leaves. Window blinds. Custom shadows. All dynamically relit onto your photo. And it runs in the browser for free. imageflow.dev
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"Ruby and Rails work so well with AI because decades of decisions, conventions, examples, and best practices have provided strong foundations for the LLMs’ training data. It’s time to build on that foundation instead of abandoning it." rubyai.beehiiv.com/p/ruby-ai…
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Mathias Karstädt retweeted
My god this is such a good speech that every SWE needs to hear. You know what? Every person should hear it Keep the happy memories, eyes on the reality, be excited about the future. That’s the best that anyone can do
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Next video will be about Jev but I had a lot of trouble using it because it was way to unreliable. Too much hype right now.
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RailsWorld shows Rails is still very relevant, so I built elbcasts.dev in Rails to host short Rails screencasts. Episode #002: one form that saves two models using a plain Ruby form object. 5 min, real code, straight from the terminal. elbcasts.dev/episodes/002-on… #RailsWorld #rubyonrails
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Mathias Karstädt retweeted
I've created a demo site for Rails Pulse so you can now try it out before you install it. demo.railspulse.com/ Have a look and let me know what you think! 😁
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Works on built-in monitor speakers too. Mine went from unusable to fine in one minute.
Bad sound is my one complaint with every non-Apple laptop I have owned. A MacBook sounds good because Apple measured its speakers and tuned the DSP; on Linux you get the raw drivers. My @slimbook Executive 14 is a lovely machine, but its speakers are no exception to the rule. This is what one press in @OmarchyLinux does to them. The Speaker Calibrator plugin makes it sound better in one minute. It plays sweeps, listens through a microphone (the built-in ones work, a cheap USB measuring mic is better), fits a protective parametric EQ and installs it as a PipeWire filter chain. Optional deep bass from bankstown, the Asahi Linux bass enhancer. Everything runs from the bar panel. What you hear is the room, recorded through the measuring mic where I sit. The off/on switch is level matched, so nothing gets louder, only the tone changes. @dhh and @SpencerGBull, you tuned the XPS 14 by hand and by ear. Challenge: run this on it and tell me how it compares. plugins.omarchy.org/plugin.h… Source: github.com/thefreshoffice/om…
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Tetris reverses aging in the brain in clinical trial. Playing an hour of Tetris per day for 6 weeks: ‣ Increased brain volume in memory region ‣ Decreased depression ‣ Decreased anxiety ‣ Decreased PTSD symptoms Swap this in for doomscrolling, your brain will thank you.
Gaming may also just make you happier.
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Been trying it for the last hour. Genuinely good. Might replace Supacode and Cmux for me.
i don’t code with anything else anymore
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Mathias Karstädt retweeted
Jacob is correct here—we really do earnestly believe AI could kill all humans! I personally think it is >10% within the next decade. I believe Anthropic is trying its best, but we do not yet have a plan to solve alignment for superintelligence and are not clearly on track to.
Replying to @hilbertspaess
The people building AI earnestly believe that it could kill us all by the end of the decade. This is not a marketing stunt. If anything, many executives and senior researchers will couch their phrasing in the press to sound sensible - but I hear the same people express fear privately. No other human activity poses this level of danger.
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This here! I myself switched to macOS because of @dhh and Ruby on Rails 18 years ago...
天天看到各种人断定 DHH 肯定不能把 Linux 桌面体验做到像 macOS 那样好,我忍不住想说一下,可能他们不知道,macOS 如今能成为主流程序员开发环境其实正是 20 多年前 DHH 发布 rails 之后开始的:TextMate 成为 RoR 开发的标配,railscast 等视频教程给你演示 macOS 下开发 rails 有多方便,以至于很长一段时间 macOS 上最主流的脚本语言就是 ruby ,比如 homebrew。 我自己就是那时候从 Linux 桌面转向 macOS 的,在此之前本来我觉得自己在 Linux 下开发体验已经不错了,但看了几个 rails 开发教学视频之后就惊了,然后开始不停地在 Gnome/KDE 之间切换,为 CompizFussion 在 NVidia 下有各种小 bug 而后悔买错显卡,从 RedHat9 一路折腾到 OpenSolaris,研究 gedit 的 snippets 插件,甚至在 intype 还不稳定的时候就设为默认开发环境,只是为了模拟出 rails 社区在 macOS 上展示出的开发体验。直到我买了 macbook 。 而过去一段时间我在做相反的事情:我把自己在个人笔记本上在 omarchy 体验到的爽点想法设法移植到公司的 macOS 上,只是因为公司的办公电脑不允许自己重装系统。 不了解 20 多年前 macOS 怎么在开发者社区流行起来的人可能会以为这是又一个 Linux 爱好者的自嗨。而我看到的是,当年号召大家去 macOS 下写代码的推手现在转换到对面阵营了。 如果你不相信 DHH 能把这事做成,我觉得你至少可以现在就装上 omarchy 玩一玩,看看 DHH 到底发现了什么。
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Every time my kids asked "is the Minecraft server up?" I'd SSH into the box to check. So I built my first Omarchy plugin: Minecraft Server Status. Player list, scheduled restarts, in-game broadcasts and world saves — all from the desktop. omarchyplugins.com/plugin.ht…
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Mathias Karstädt retweeted
I got TouchID working on @OmarchyLinux. 👀 T1 chip, 2016-17 TouchBar era. My understanding is that TouchID hasn't been cracked on any Linux distro yet, so an Omarchy first? I don't have a T2 model, and M-series is not supported by Omarchy (yet) so not sure what's next.
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Mathias Karstädt retweeted
Try Omarchy runs Omarchy on your Apple Silicon MacBook. No setup, just a standard app install. Super easy to give Omarchy a try before you install it. Link in the first reply. Here's a demo of the full setup (~3min)
I built a version of Omarchy that runs on your MacBook. I wanted to try out Omarchy before doing a full install, but I only have an M series MacBook so I would have to find a laptop etc. So I decided to create something that allows people to test and run Omarchy on their devices so they can understand how it feels. Now you can run Omarchy Quattro as a native, hardware-accelerated app on your Apple Silicon Mac! 🤯 I tried many things, and this approach achieved the best results. The native keyboard experience with Super shortcuts works very well, along with all the rest. If you're curious, download it here: github.com/themartiano/try-o…
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Tried rolling my own Arch config a while back (pre-Claude Code). Two weeks later it broke and I couldn't fix it. Omarchy takes the pain, leaves the fun. 🙏
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