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I ported Mac OS X to the Nintendo Wii
Mac OS X 10.0 (Cheetah) running natively on the Nintendo Wii
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Pi 1.0
Today we are shipping Pi 1.0, a hardened, minimal, extensible agent harness, alongside Pi Durable, a new experimental substrate for long-running agentic applications.
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WTF Ubuntu?
In case you missed it: CVE-2026-98432 is a critical (CVSS 9.8) bug in the Linux kernel's TCP code. It's been there since 2016, so virtually every Linux server on the planet has it, and it can be hit remotely. Anthropic says it built a working exploit that gets root on a server. A total takeover.
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Creepy Crawlies
You've probably heard me complain about the "AI crawlers" before, but now I actually have some hard numbers I can put up to show their im...
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The Waymo World Model
We are excited to introduce the Waymo World Model, a frontier generative model that sets a new bar for large-scale, hyper-realistic autonomous driving simulation.
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I am building a cloud
Today is fundraising announcement day . As is the nature of writing for a larger audience, it is a formal, safe announcement. As it should be. Writing must necessarily become impersonal at scale. But I would like to write something personal about why I am doing this. What is the goal of building exe.dev ? I am already…
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Running Tesla Model 3's computer on my desk using parts from crashed cars
David Schütz's bug bounty writeups
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An update on recent Claude Code quality reports
We traced recent reports of Claude Code quality issues to three separate changes. Here's what happened, what we fixed, and what we're changing.
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PGSimCity - How PostgreSQL Works
An independent, non-commercial educational visualization of PostgreSQL internals. Not affiliated with Electronic Arts.
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Saving 100 terabytes of memory by optimizing 1.1.1.1's DNS cache
Five Rust-level memory optimizations to the DNS cache layout of Big Pineapple cut per-entry memory by 56%, freeing approximately 100 TB of memory across Cloudflare's fleet.
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The 49MB web page
A look at modern news websites. How programmatic ad-tech, huge payloads and hostile architecture destroyed the reading experience.
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I fixed Windows native development
Imagine you’re maintaining a native project. You use Visual Studio for building on Windows, so you do the responsible thing and list it as a dependency
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The session you cannot take with you
Inference APIs are filling sessions with encrypted reasoning, hidden search results, opaque compaction, and encrypted subagent messages. A growing form of lock-in.
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TCP Use-After-Free: CVE-2026-98432 / CVSS 9.8
CVE-2026-98432 is a CVSS 9.8 remote use-after-free in Linux's IPv4 TCP handshake, fixed upstream Oct 15. RHEL has fixes; Ubuntu's are still in testing.
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A 10 year old Xeon is all you need
Or running Gemma 4 on a 2016 Xeon with no GPU, 25 flags, 128 GB of DDR3, and a 25B-parameter MoE.
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Libghostty 1.0
libghostty-vt 1.0 is here. libghostty is a portable, high-performance C library for terminal emulation, extracted directly from the core of Ghostty. The 1.0 release means both the library itself and the C ABI are now stable.
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Everyone should know SIMD
SIMD has a reputation for being complex. I've met many very good software engineers who dismiss it as something too complex to learn or a niche optimization meant for only the highest-performance software, not useful in everyday programming.
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There's no reason for software to be slow anymore
The other day, I saw a viral tweet saying that people talking about how LLMs are causing slow, bloated, code are going to eat crow once they re-write everything in super-optimized assembly. We're not quite at the point where we want to write everything in assembly , but some variant of what Nolan Lawson said about…
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Why does SSH send 100 packets per keystroke?
I made my next game twice as fast by forking go's crypto library
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Asahi Linux Progress Linux 7.0
Porting Linux to Apple Silicon
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The August 17 outage
An update on the August 17 outage and the steps we're taking to improve reliability.
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Finding and fixing Ghostty's largest memory leak
A few months ago, users started reporting that Ghostty was consuming absurd amounts of memory, with one user reporting 37 GB after 10 days of uptime. Today, I'm happy to say the fix has been found and merged . This post is an overview of what caused the leak, a look at some of Ghostty's internals, and some brief…
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Ubuntu still has not released patch for Linux 0day RCE in almost 3 weeks
No patched kernels are available yet for 22.04, 24.04, or 26.04 despite a CVSS 9.8 rating.
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Linux support is coming to Snapdragon X2 series
Explore the agentic AI PCs, Googlebook laptops, Linux support and partner devices powered by Snapdragon unveiled at Snapdragon Summit 2026.
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The gold standard of optimization: A look under the hood of RollerCoaster Tycoon
Due to some lucky circumstances, I recently had the chance to appear in one of the biggest German gaming podcasts, Stay Forever, to talk about the technology of RollerCoaster Tycoon (1999). It was …
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What Is a Harness?
An agent harness is a piece of software that provides an environment for an AI model to operate within.
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Asahi Linux 7.1 Progress Report
Porting Linux to Apple Silicon
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Asahi Linux on M3
Porting Linux to Apple Silicon
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Executable Is a SQLite Database
I have been probably obsessed with two things in the last few years: Nix as a tool to explore innovative ideas that require the capability to rebuild the world and replacing ELF with SQLite as an executable format. You might have noticed that these two ideas are well suited to each other.