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Concerning behavior from a popular open-weight AI model
Discover how untrusted open-weight AI models can potentially leak data, even when self-hosted. Learn the security risks and how to protect your enterprise.
Most cited
Posts that commenters keep linking to, ranked by how many different people have cited them in Hacker News comments. 464 posts.
212
A digestion of the Jacobian conjecture counterexample
The notorious Jacobian conjecture can be formulated concretely over the complex numbers as follows. Conjecture 1 (Jacobian Conjecture) Let $latex {F:{\bf C}^n \rightarrow {\bf C}^n}&fg=000000$ …
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Police Have Used License Plate Readers at Least 14x to Stalk Romantic Interests
This article was updated on September 3, 2026. For a more comprehensive and up-to-date tally of ALPR abuse, check out IJ’s database of ALPR abuse. […]
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Patch the Planet: global response coordination as agents uncover vulnerabilities
Patch the Planet connects security researchers, maintainers, and incident responders to help address critical vulnerabilities across open source.
217
Things Unix can do atomically (2010)
This is a catalog of things UNIX-like/POSIX-compliant operating systems can do atomically, making them useful as building blocks for thread-safe and multi-process-safe programs without mutexes or read/write locks. The list is by no means exhaustive and I expect it to be updated frequently for the foreseeable future.
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Apple Silicon and Virtual Machines: Beating the 2 VM Limit (2023)
macOS Internals Deep Dive Building a Development Kernel Collection Configuring our Mac to boot the Development Kernel Collection Putting our machine to work! When did Apple grace us with this feature? Undoing our work for OS updates Closing Thoughts
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Better Models: Worse Tools
About an aggravating tool-calling regression in newer Claude models.
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The relay market powering token resellers and fraud
A look inside the gray-market reseller economy that gives mainland China cheap, structured, B2B-grade access to OpenAI, Anthropic, Google, and beyond
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An agent used DNS to reach an external chatbot
Research on aligning AI with human values and intent, and reports documenting model failures.
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Rsync and outrage
I gave up blogging a long time ago (apart from an occasional thing about ArduPilot), I tend to just write code and hope people find it…
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Permacomputing
By Devine Lu Linvega
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Zig 0.16.0 Release Notes
Zig is a general-purpose programming language and toolchain for maintaining robust , optimal , and reusable software.
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You need to rewrite your CLI for AI agents
Human DX optimizes for discoverability. Agent DX optimizes for predictability. What I learned building a CLI for agents first.
226
How AI text watermarking works
A gentle visual guide to how a statistical mark hides inside generated text, and what erases it.
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The case against geometric algebra (2024)
Every once in a while the internet gets talking about Geometric Algebra (henceforth GA) and how it’s a new theory of math that fixes everything that’s wrong with linear algebra and multivariable calculus. When I come across this stance I am compelled to respond with something like: “wait wait, it’s not true! GA is…
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Agent Psychosis: Are We Going Insane?
What’s going on with the AI builder community right now?
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Rathbun's Operator
First, I’m a human typing this post. I’m not going to tell you who I am. Sure, many will say that is cowardly and fair, but I actually don’t think it would bring much value. What matters more is that I describe why, and what I did and didn’t do during the last two weeks or so with the OpenClaw agent I set up, known as…
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Kraków, Poland in top 5 worst air quality worldwide
Compare live air quality rankings for major cities worldwide. See real-time AQI levels and pollution conditions by location.
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Which programming languages are most token-efficient?
Comparing token efficiency across 19 popular programming languages using RosettaCode data - from Clojure to C, there's a 2.6x difference.
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Async Rust vs RTOS showdown (2022)
It's time for another technical blog post about async Rust on embedded. This time we're going to pitch Embassy/Rust against FreeRTOS/C on an STM32F446 microcontroller.
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The struggle of resizing windows on macOS Tahoe
A lot has already been said about the absurdly large corner radius of windows on macOS Tahoe. People are calling the way it looks comical, like a child’s toy, or downright insane.
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.name Termination
Nearly twenty-five years ago I registered neil.fraser.name to provide a stable presence on the Internet. It has been the home of this website, my email address, and a server for APIs. It predates YouTube, Facebook, and smart phones. Minutes after my daughter was born, I also registered beverly.fraser.name .
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Claude Opus 4.8
Claude Opus 4.8 brings stronger performance across coding, agentic tasks, and professional work, and the consistency to handle long-running work.
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Gemini 4 Argon
Announcing Gemini 4 Argon, our frontier model for real-world coding, enterprise knowledge work, and cyber defense, rolling out soon.
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GPT-5.5
This post introduced GPT-5.5, a model built for complex tasks like coding, research, and data analysis across tools.
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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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Midjourney Medical
A New Era of Midjourney, announcing Midjourney Medical: full-body Ultrasonic CT and the Midjourney Spa.
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The dead economy theory
We can laugh at them but we have to take this seriously