I was working on a bug in Chocolate Quake netcode. The issue was an edge case where starting two clients on the same machine resulted in the second one zombifying the first one. When the bug occurred there was no disconnection but the client could no longer move. Instead the screen would show an "indicator" looking…
A retrospective on making the switch from React to StimulusJS at Scholarly
Current recommendations of agentic coding.
Only the engineers who work on a large software system can meaningfully participate in the design process. That’s because you cannot do good software design…
A cozy little corner of the web.
*if you include word2vec.
I got a job!
Visualizing the internal state of a Transformer model
.NET 10 GC tuning shows how stack allocations, DATAS, and region sizing cut allocations, improve latency, and reduce your cloud cost.
In 2025, playing your own music on an iPhone is surprisingly hard, unless you pay Apple or navigate a maze of limitations. So I built my own player from scratch, with full text search, iCloud support, …
8 years have passed since the the left-pad incident happened. It's been good for me to avoid this subject for focusing on actual work. Also, silence is gold. On the other hand, left-pad is seen as a notable event mentioned in books, so I'll share more info and thoughts about what exactly happened.
Why I'm very excited about `go tool` landing in Go 1.24.
Because manually squinting at hex dumps is so last century. Let me show you how AI-assisted debugging is leaving WinDBG's command line in the dust.
I sent my CV for a role at Kagi Search, the description of the role can be found here:
How I built MacThrottle, a menu bar app that tells me when my Mac is thermal throttling, and the journey to find the right macOS APIs.
How I overcame copying and modifying my own diff library from project to project by diving too deep into diff algorithms and coming out at the other end with new diff library in my hand.
A blog post by Ryan Geyer
Updated 2026-07-10 for the agent-teams era. Originally published September 2025. A subagent in Claude Code is a separate agent your session spawns to do a...
Amazing as it may seem after all these years, there are still junior developers in the world. A few weeks ago at work we had a talk where senior developers (including me) were invited to spend around five minutes each talking about our personal software development philosophies....
Perhaps the most often repeated complaint about Rust is its slow feedback loop and long compilation times. I hear about it all the time; in Rust podcasts, blog posts, surveys, conference talks or offline discussions. I also regularly complain about it, being a Rust user myself!
Over the last decade, we’ve seen great advancements in distributed systems, but the way we program them has seen few fundamental improvements. While we can sometimes abstract away distribution (Spark, Redis, etc.), developers still struggle with challenges like concurrency, fault tolerance, and versioning. There are…
A developer's lament about Xcode's opaque errors, unreadable project files, and Apple's culture of pretending everything is fine.
Why does Space Station 14 crash with ANGLE on ARM64? 6 hours later…
I've started working on a new edition of Ruby Under a Microscope that covers Ruby 3.x. I'm working on this in my spare time, so it will take a while. Leave a comment or drop me a line and I'll email you when it's finished.
A blog about computers, functional languages, Lisp, and Scheme.
LLM agents make bad pairs because they code faster than humans think. I'll admit, I've had a lot of fun using GitHub Copilot's agent mode in VS Code this month.…
