Jakob Skjerning
@jakobs.bsky.social
Aka @mentalizer from Twitter.
Rails OG, web application developer, consultancy owner, sailor, and dad joke appreciator.
Building substancelab.dk, frontlobby.dk, skrift.eu, writes at mentalized.net
Rails OG, web application developer, consultancy owner, sailor, and dad joke appreciator.
Building substancelab.dk, frontlobby.dk, skrift.eu, writes at mentalized.net
“if the web is going to survive the next wave of complexity, automation, and expectation – we need to remember how to build it properly”
Why semantic HTML still matters
www.jonoalderson.com/conjecture/w...
Why semantic HTML still matters
www.jonoalderson.com/conjecture/w...
Why semantic HTML still matters
If you want to build for performance, accessibility, discoverability, or resilience, you must start with HTML that means something.
www.jonoalderson.com
November 12, 2025 at 6:45 AM
“if the web is going to survive the next wave of complexity, automation, and expectation – we need to remember how to build it properly”
Why semantic HTML still matters
www.jonoalderson.com/conjecture/w...
Why semantic HTML still matters
www.jonoalderson.com/conjecture/w...
Reposted by Jakob Skjerning
PURE CINEMA
watch this robot reveal video with sound on for maximum effect
watch this robot reveal video with sound on for maximum effect
Joke of the day from Moscow: Russia tried to unveil its first humanoid AI robot, Aidol. Key word: tried. The robot collapsed during its debut, forcing organizers to cut the presentation short. Their rushed attempt to lift the prop only made things worse.
November 11, 2025 at 7:20 PM
PURE CINEMA
watch this robot reveal video with sound on for maximum effect
watch this robot reveal video with sound on for maximum effect
Reposted by Jakob Skjerning
Go home, Copilot, you're drunk
October 31, 2025 at 12:58 PM
Go home, Copilot, you're drunk
Reposted by Jakob Skjerning
Friendly reminder: If the engineers at your company don't have access to the right keys / logs / observation tools, you can't blame them when the app is slow or down, when it takes a long time to get back to normal operation.
October 26, 2025 at 3:11 AM
Friendly reminder: If the engineers at your company don't have access to the right keys / logs / observation tools, you can't blame them when the app is slow or down, when it takes a long time to get back to normal operation.
Someone pointed me at the eductation version of PICO-8 oh god someone stop me please #idonthavetimeforthis #game #gamedev #pico8
October 24, 2025 at 8:50 AM
Someone pointed me at the eductation version of PICO-8 oh god someone stop me please #idonthavetimeforthis #game #gamedev #pico8
Reposted by Jakob Skjerning
Over the past week, the president said the DOJ should pay him a quarter billion dollars, bulldozed half the White House to build himself a gaudy ballroom, bragged about murdering civilians in international waters, pardoned some more criminals, directed federal prosecutors to indict his opponents ...
October 23, 2025 at 9:42 PM
Over the past week, the president said the DOJ should pay him a quarter billion dollars, bulldozed half the White House to build himself a gaudy ballroom, bragged about murdering civilians in international waters, pardoned some more criminals, directed federal prosecutors to indict his opponents ...
Love the "Marketing mode" toggle on sentry.io/welcome/ 😆
Application Performance Monitoring & Error Tracking Software
Application performance monitoring for developers & software teams to see errors clearer, solve issues faster & continue learning continuously. Get started at sentry.io.
sentry.io
October 23, 2025 at 6:38 AM
Love the "Marketing mode" toggle on sentry.io/welcome/ 😆
One of these days I'll learn to spell enqueued.
October 21, 2025 at 1:12 PM
One of these days I'll learn to spell enqueued.
You know you're day is going downhill the moment you have to bundle open actionpack to help debug an issue 😭
October 17, 2025 at 10:18 AM
You know you're day is going downhill the moment you have to bundle open actionpack to help debug an issue 😭
Every so often you have a small script that needs to be run on your staging or production server, but committing and ...
One-off scripts on Heroku with Rails
Running one-off maintenance scripts in your Rails application hosted on Heroku is easy, Jakob guides you here.
mentalized.net
October 16, 2025 at 3:10 PM
Every so often you have a small script that needs to be run on your staging or production server, but committing and ...
Reposted by Jakob Skjerning
Germany's justice ministry held firm and killed EU chat control (for now):
"Chat control without cause must be taboo in a state governed by the rule of law. Private communication must never be under general suspicion."
Admirably concise and direct. German in the best possible way.
"Chat control without cause must be taboo in a state governed by the rule of law. Private communication must never be under general suspicion."
Admirably concise and direct. German in the best possible way.
October 8, 2025 at 7:21 PM
Germany's justice ministry held firm and killed EU chat control (for now):
"Chat control without cause must be taboo in a state governed by the rule of law. Private communication must never be under general suspicion."
Admirably concise and direct. German in the best possible way.
"Chat control without cause must be taboo in a state governed by the rule of law. Private communication must never be under general suspicion."
Admirably concise and direct. German in the best possible way.
Reposted by Jakob Skjerning
For your professional goals, make a habit of just steadily putting points on the board, consistently doing a little bit steadily, even if you’re bad at it sometimes. You’ll be amazed at how quickly successes start to compound. Don’t let your job get in the way of your career.
Those who are 35+, what advice do you have for people just entering their 30s?
October 6, 2025 at 5:02 AM
For your professional goals, make a habit of just steadily putting points on the board, consistently doing a little bit steadily, even if you’re bad at it sometimes. You’ll be amazed at how quickly successes start to compound. Don’t let your job get in the way of your career.
Reposted by Jakob Skjerning
Fuck apps - build websites.
New from 404 Media: Google removed an ICE-spotting app too. Called Red Dot, an immigration support group on the ground in Chicago told me it was using it. Google now removed, just like Apple did with ICEBlock after DOJ pressure. Google calls ICE vulnerable group
www.404media.co/google-calls...
www.404media.co/google-calls...
Google Calls ICE Agents a Vulnerable Group, Removes ICE-Spotting App ‘Red Dot’
The move comes as Apple removed ICEBlock after direct pressure from U.S. Department of Justice officials and signals a broader crackdown on ICE-spotting apps.
www.404media.co
October 3, 2025 at 4:52 PM
Fuck apps - build websites.
Dear recruiter, if a quick phone call is enough to figure out if things make sense, it is possible to include a short description of the gig in the initial email...
October 3, 2025 at 9:55 AM
Dear recruiter, if a quick phone call is enough to figure out if things make sense, it is possible to include a short description of the gig in the initial email...
Reposted by Jakob Skjerning
People who use excel needs things be accurate. I just don't understand who thought this was a good idea.
"Microsoft says its Agent Mode in Excel has an accuracy rate of 57.2%" 😶
I often wonder how these corps would have turned the world upside down if genAI was actually accurate and useful. they've lost their minds over shoddy and mediocre tools
www.theverge.com/news/787076/...
I often wonder how these corps would have turned the world upside down if genAI was actually accurate and useful. they've lost their minds over shoddy and mediocre tools
www.theverge.com/news/787076/...
Microsoft launches ‘vibe working’ in Excel and Word
Vibe working is all about Office’s new Agent Mode.
www.theverge.com
October 1, 2025 at 9:32 PM
People who use excel needs things be accurate. I just don't understand who thought this was a good idea.
👌
Someone also recommended this repository for other small files if needed:
github.com/mathiasbynen...
github.com/mathiasbynen...
GitHub - mathiasbynens/small: Smallest possible syntactically valid files of different types
Smallest possible syntactically valid files of different types - mathiasbynens/small
github.com
September 29, 2025 at 10:37 AM
👌
September 26, 2025 at 2:23 PM
Reposted by Jakob Skjerning
Does a sample Rails application exist that could be used for education or demos or similar? Something that demonstrates most Rails features, but isn't too complex to follow? Preferably with sample data?
September 22, 2025 at 11:35 AM
Does a sample Rails application exist that could be used for education or demos or similar? Something that demonstrates most Rails features, but isn't too complex to follow? Preferably with sample data?
Reposted by Jakob Skjerning
Pause your doomscrolling and listen to this story.
September 20, 2025 at 1:31 PM
Pause your doomscrolling and listen to this story.
Is there any way to debug what classnames Tailwind finds in what source files, in particular to find out why it hasn't found some specific classnames 🤨 Feel like I've tried every combination of path in my @source now
tailwindcss.com/docs/detecti...
tailwindcss.com/docs/detecti...
Detecting classes in source files - Core concepts
Understanding and customizing how Tailwind scans your source files.
tailwindcss.com
September 20, 2025 at 10:41 AM
Is there any way to debug what classnames Tailwind finds in what source files, in particular to find out why it hasn't found some specific classnames 🤨 Feel like I've tried every combination of path in my @source now
tailwindcss.com/docs/detecti...
tailwindcss.com/docs/detecti...
Reposted by Jakob Skjerning
Hi folks, I am the president of the Ruby Central board. I don’t have time to reply to posts individually, but I do want to make clear that recent changes to permissions in our open source projects were done in collaboration with the organization’s leadership and not by one person unilaterally 🧵
September 19, 2025 at 2:30 PM
Hi folks, I am the president of the Ruby Central board. I don’t have time to reply to posts individually, but I do want to make clear that recent changes to permissions in our open source projects were done in collaboration with the organization’s leadership and not by one person unilaterally 🧵
Reposted by Jakob Skjerning
Hey, #ruby folks! I've been one of the #RubyGems maintainers for the last decade.
Ruby Central has forcefully taken control of the RubyGems organization on GitHub, the `rubygems-update` and `bundler` gems on rubygems[.]org, and more.
You can read the details here: pup-e.com/goodbye-ruby...
Ruby Central has forcefully taken control of the RubyGems organization on GitHub, the `rubygems-update` and `bundler` gems on rubygems[.]org, and more.
You can read the details here: pup-e.com/goodbye-ruby...
RubyGems.org | your community gem host
rubygems.org
September 19, 2025 at 7:51 AM
Hey, #ruby folks! I've been one of the #RubyGems maintainers for the last decade.
Ruby Central has forcefully taken control of the RubyGems organization on GitHub, the `rubygems-update` and `bundler` gems on rubygems[.]org, and more.
You can read the details here: pup-e.com/goodbye-ruby...
Ruby Central has forcefully taken control of the RubyGems organization on GitHub, the `rubygems-update` and `bundler` gems on rubygems[.]org, and more.
You can read the details here: pup-e.com/goodbye-ruby...