It’s been years since I’ve seen a CD-ROM drive in the wild

Is there some janky AI coding assistant offering free tokens right now? I’ve seen some garbage PRs recently that are clearly not from a recent Claude or Codex

Elixir v1.20 released! Now officially a gradually typed language: Elixir type checks every single line of code, finding bugs and dead code, without developer overhead (no typing signatures) and extremely low false positives rate. Plus a faster compiler! Links and reports below.

I've got an agent in a loop optimizing a renderer with the goal to minimize frame times (and tests to measure). It got times down from 88ms to 2ms and allocations down from ~150K to 500. Sounds good, right? Wrong. This is exactly why agent psychosis is a big fucking problem. As an experiment, I rewrote the Ghostty core render state in Go, with access to identically laid out data structures as Ghostty and the exact same validation tests. I made a purposely naive renderer (simple, correct, but slow). 88ms per frame with 150,000 allocations (horrendous, lol)! I then kickstarted a Ralph loop to bring the frame times down. I told it it can't modify input data structures or the public API or tests (they're correct), but it can do anything else it wants. It got to work. It has worked for about 4 hours. I've spent around $350 on this experiment so far. The results? 88ms => 1.5ms 150K allocs => ~500 allocs Incredible right? Nope. My hand-written renderer I ported has frame times (same benchmark) of ~20us (0.020ms) and 0 allocations in the update path. This is the problem with psychosis and lacking systems understanding. If you don't understand the system, you're going to accept that this is an incredible result. If you understand the system, you'll see better solutions immediately and can do roughly 75x better on throughput. The people who blindly trust agent output are in the former camp. They're sheeple, overdrinking from a fountain of mediocrity. Standard disclaimer: I use AI all the time. I like AI. The point I'm making is to not blindly accept results. Think. Analyze. Learn.

Codiff: A beautiful, extremely fast local diff viewer I review SO MUCH code locally these days. I asked Codex to build it using diffs.com and trees.software. Thanks @amadeus and @fat. Amazing software. It took 16 minutes to build this. It's amazing. github.com/nkzw-tech/codiff

my bike rides stopped syncing, so i decompiled the firmware. found a hidden dev mode. sent 3 bytes over BLE. my cycling computer now says “WELCOME TO HELL DEVELOPER” and i now have debug capabilities.

At this point, this is just irresponsible. Yes, coding agents are leading to an increase of software production, but we are not seeing a similar push or increase in software quality. If Anthropic focuses on safety and it believes software engineering is going away, then it needs to be doing much more to improve how we design, build, test, and maintain software (aka software engineering). Increasing the production of unreliable, poorly designed, and unverified software directly undermines safety. Claude Code is claimed to be "fully written by AI". In the last two months, it took three separate postmortem-worthy failures and user complaints to surface what their own testing missed. Yesterday users were being over billed by hundreds of dollars. Software engineering isn't ready to go away and there is not enough progress to argue that case. I am certain Anthropic would argue that AI progress in other domains is strongly dependent on having proper safeguards in place. I can't wrap my head around the cognitive dissonance when it comes to software. PS: Mythos (may) improve software security, but that is only a subset of safety.

Good. This should be low status. You have to be a masochist to do it. And then all the stupid people who do it for status can leave.

fuck this administration it does not matter your feelings on immigration at all, this is not how our legal system is intended to work

Hey. Sentry supports @EffectTS_ now. 😎 github.com/getsentry/sentry-…

I've used Gmail for 20 years. Almost 2M emails, 150K attachments. Rather than let Google hold my data hostage, I built msgvault: local-first email archive with a terminal UI and MCP server, powered by DuckDB. Open source, single Go binary. wesmckinney.com/blog/announc…

Yesterday, I livestreamed one of my Zwift Races. Today, I received a Copyright Infringement Notice from ASO via YouTube, which resulted in my livestream being taken down globally. 🚫 ASO has absolutely no connection to anything in my video. 🤷‍♂️ Fix your system, @TeamYouTube.

If you’ve been programming for 20 years without using recursion you are doing it without realizing it, you’re working with some weird environment where explicit recursion is just not a technique that makes sense to use, or you have done the same two years of programming ten times

Monads are definitely NOT burritos.

Well @etrepum nerdsniped me and I wanted to see if Claude can make simplejson work with free threading and subinterpreters. Now I'm trying to figure out how to install Python 2.7. I did not think I would use Python 2.7 again!

Is there anyone out there champing at the bit to do this kind of Python C API work? simplejson could use a similar refactor and I don’t have the motivation to do it myself (while still supporting old Python versions)

The uv release pipeline broke because our release notes included the term "Bearer Token", causing GitHub to redact and malform a JSON payload in GitHub Actions. Ironically, the entry in the release notes was about redacting Bearer Tokens in various output contexts.

If you are thinking of starting a startup: do it now. If you are thinking of having kids: do it now. Marry that girl. Start that project. Do it *today*. Take it from someone who was often over cautious – my only regret is not starting earlier.

A picture John Hughes took of me giving my keynote talk Functional Programming for Hardware Design at #icfpsplash25. A few key quotes/messages: * I love programming languages not for what they do, I love programming languages for what they are. * I am a functional programmer not because of the company I work for, but because of the company I keep. * Abstractions can be powerful, but we must know their limits. * "But this is total madness": SystemVerilog semantics. * It is because I have spent so much of my time doing low level coding and optimization that I appreciate the value of functional programming, and the power of the abstractions that it provides me to help me to tackle low level programming tasks. * You might think Jane Street is just a t-shirt company, but they also make a functional hardware description language. * A PL education gives you a solid grounding in technical problem solving skills, presentation skills etc. that will be invaluable for your career in a wide range disciplines. There should be a video released soon of the talk. Until then here is a link to the slides I used, with presenter notes for each slide: docs.google.com/presentation… @icfp_conference

In over 15 years of open source, I can't remember ever saying "your example doesn't compile" (I probably did, but it's so rare I can't remember). Now, I literally say this everyday. Please, can people using AI be less fucking stupid about it.

Been at GitHub for nearly 13 years and I'm pretty sure this request is more than 10 years old... 🆕Comment on unchanged lines in any file inside a Pull Request is now available Gotta keep the core of GitHub getting better every day. 🫡