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Everything in C is undefined behavior
If he had been a programmer, Cardinal Richelieu would have said “Give me six lines written by the hand of the most expert C programmer in the world, and I wi...
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The latest blog posts to take off on Hacker News. 21,815 posts.
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PHP's Oddities
flow2 | Blog post: 'PHP's Oddities' in Tech
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Using HTTP/2 Cleartext for a server in Go 1.24
I'll give a brief outline of how to enable HTTP/2 cleartext (h2c) in a Go API server when you are using Go 1.24 or newer. This is useful in Cloud Run environments, which handles TLS termination but can take advantage of HTTP/2 features.
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Mini Shai-Hulud Strikes Again: 314 npm Packages Compromised
A compromised npm maintainer account published 637 malicious versions across 317 packages including size-sensor, echarts-for-react, timeago.js, and hundreds…
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New features in GCC 16: Improved error messages and SARIF output
Explore new GCC 16 features for C++ developers. Learn about improved hierarchical error messages, updated SARIF output, and experimental HTML diagnostic tools.
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No more JetBrains products for me
The personal website of Matthew Kosarek
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Cursor Introduces Composer 2.5
A substantial improvement in intelligence and behavior over Composer 2, particularly on long-horizon agentic tasks.
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The occasional ECONNRESET
Two services running on the same machine. One of them opens a listening TCP socket bound to localhost, the other one connects to that. They exchange data. Every now and then , the service that initiated the connection gets an ECONNRESET while reading data from the socket -- but no other errors show up in the logs, no…
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Intro to TLA+ for the LLM Era: Prompt Your Way to Victory
You can go far without writing TLA+ syntax now, but you still need to understand temporal logic.
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Native all the way, until you need text
Why building a rich, selectable, streaming Markdown chat UI on macOS still pushes you toward WebKit or Electron.
792
Hosting a website on an 8-bit microcontroller
My victim is the AVR64DD32 which is quite similar to the Atmega328 of Arduino fame. Compared to the older Atmega, these AVR DD lines are cheaper for the same memory, use a single programming pin and have nicer peripherals:
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The Fil-C Optimized Calling Convention
Fil-C achieves memory safety even for programs that behave adversarially. That includes casting function pointers to the wrong signature and then calling them, exporting a function with one signature in one module and then importing it with a different signature in another, or even exporting a symbol as a function in…
794
HTML Lists
This second installment in the "You don't know HTML" series is going to be all about the ways that we put collections of things together
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DeepSeek-V4-Flash means LLM steering is interesting again
Ever since Golden Gate Claude I’ve been fascinated with “steering”: the idea that you can guide LLM outputs by directly manipulating the activations of the…
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My Favorite Bugs: Invalid Surrogate Pairs
In which I revisit one of my favorite bugs, the invalid surrogate pair.
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'No way to prevent this,' says only package manager where this regularly happens
Kevin Patel - Application Security Engineer @ NISC
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Erlang/OTP 29.0
The official home of the Erlang Programming Language
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Jank now has its own custom IR
The jank compiler has a new super power. With that, we push jank to the limits to see who has the fastest fibonacci in the west.
801
Additive Blending on the Nintendo 64
Did you ever wonder why explosions and other effects looked so much cooler on the original PlayStation than they did on the Nintendo 64?
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Prolog Basics Explained with Pokémon
Demonstrating the basics of logic programming with data from the Pokémon games.
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O(x)Caml in Space
On 23 April, Borealis booted in orbit on DPhi Space's ClusterGate-2: a pure-OCaml CCSDS protocol stack with end-to-end-encrypted command and control and post-quantum key rotation. OxCaml is what comes next.
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C++26 Shipped a SIMD Library Nobody Asked For
std::simd Can't Express 90% of Real SIMD Code
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How Claude Code works in large codebases
The most successful Claude Code deployments share a set of recognizable patterns across configurations, tooling, and org structure. This article is part of Claude Code at scale, a new series covering best practices for engineering organizations building with Claude Code at enterprise scale.
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Codex is now in the ChatGPT mobile app
Use Codex anywhere with the ChatGPT mobile app. Monitor, steer, and approve coding tasks in real time across devices and remote environments.
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What's in a GGUF, besides the weights – and what's still missing?
What extra stuff is needed to properly run a language model? Besides the weights of a language model, what is the gguf metadata that we need to parse and use?
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Building ML framework with Rust and Category Theory
A modular, compile-checked tutorial for learning category-theory ideas through a tiny Rust ML pipeline.
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The Third Hard Problem
It’s not off-by-one errors.