OpenAI just open-sourced Codex Security

https://opengraph.githubassets.com/53fe26d3793368555a54cec752476bc7c80eda728e4ca8c05391d501dde71fdf/openai/codex-security
Codex Security is an open-source CLI and TypeScript SDK for finding, validating, and reviewing security issues in code. It supports macOS, Linux, and Windows, and requires Node.js 22 or later.

Half-Life ported to Mac OS 9

https://mac-classic.com/images/uploads/news-articles/preview-images/half-life-ported-to-mac-os-9/icon.gif
Half-Life, a story-driven first-person shooter, has been ported to PowerPC Macintosh computers 28 years after its original release. The game, developed by doctashay using Xash3D FWGS, is playable from start to finish with multiplayer support and additional downloads.

Substack writers, you need a website

https://elizabethtai.com/wp-content/uploads/2026/06/pexels-photo-16622632.jpeg?w=1024
Writers should not make Substack their digital home, as it's short-sighted and can derail long-term visibility on the internet. Instead, they should treat their website as the definitive source of truth and use platforms like Substack as distribution pipes.

Underwater Oxygen Loss Threatens Earth's Stability, Researchers Warn

https://scripps.ucsd.edu/sites/default/files/styles/400px_wide/public/2026-07/aquatic-deoxygenation-705.jpg?itok=F9Fz5ZDj
A Drupal error occurred at line 552 due to a module handler issue. The error is related to entity view alteration.

Anthropic publishes a practical key-recovery attack on HAWK-256

https://opengraph.githubassets.com/4da497be94a26ac57b0a1b81dbb642e1e8c087b080a5c93bacbdfe9f7dec9ea5/anthropics/cryptography-research-demo
Contribute to anthropics/cryptography-research-demo development by creating an account on GitHub.
https://private-user-images.githubusercontent.com/17400377/628109227-e5d46dba-d099-416c-a10a-0177c403ff56.png?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.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.D5zcBbSxTsNceAmK41QO6_2bsC5xjAGCBU8uKwGkCwk
HNewhere detects Hacker News stories, loads comments into a sidebar, and lets you browse discussions without leaving the page.

Steel Bank Common Lisp version 2.6.7

SBCL has released new versions with various bug fixes, optimizations, and minor incompatible changes. The updates include improvements to the compiler, documentation, and platform support, as well as fixes for issues related to type checking, memory management, and foreign function calls.

Kimi K3 Architecture Overview and Notes

https://sebastianraschka.com/images/blog/2026/kimi-k3-architecture-notes/kimi-k3-architecture.webp
Kimi K3 is a scaled-up version of Kimi Linear with a new LatentMoE component and attention residuals. It improves inference efficiency and validation loss, but adds 4% training and 2% inference cost.

The iPhone Upgrade Program is being replaced by Apple Upgrade

https://store.storeimages.cdn-apple.com/1/as-images.apple.com/is/iphone-upgrade-sunset-specialist-202607?wid=980&hei=1140&fmt=png-alpha&.v=MDd3NDZSbDIxYVo2clJ0RGZVRE5iMndtUkFZWUUrYVpuRTNxSWUwVjNwZkFxRnR0ZGxhOWFRYm1OaWtMcGgyd3FodDhCQkpVa3lvNFZKU1U0b0laUGVNME5rOTNmWjVGcVZUUzZVeUJxVis1RElWTFhOV0pxbzkvVGd4N1ZTdHg
There’s more than one way to get your next iPhone. You can lease with our new program, Apple Upgrade; shop the latest carrier deals; finance with Apple, or buy with a one-time payment. Have questions about what’s best for you? Chat with a Specialist (Opens in a new window) online or in a store.

Delayed Gratification – Proud to Be 'Last to Breaking News'

https://www.slow-journalism.com/wp-content/uploads/2026/07/slow-journalism-magazine-banner-62.jpg
A beautiful quarterly publication which revisits the events of the last three months to offer in-depth, independent journalism in an increasingly frantic world. Read more about DG. Subscribe Slow Journalism in your inbox, plus infographics, offers and more: sign up for the DG newsletter Sign up

Running Kimi K3 on a M1 Max

https://opengraph.githubassets.com/4419400a42486565d8b5f84e905219d617de2ff106ccb46a6717d711898608a5/gavamedia/deltafin
Deltafin is a research project that runs a Mixture-of-Experts model on a 64 GB laptop, taking 16 seconds per token, but is exact and reproducible. It can be made faster with newer chips and more RAM.

MCP 2026-07-28 Specification: transport going stateless

https://blog.modelcontextprotocol.io/og-image.png
The MCP protocol has released a new version with a stateless protocol core, improving scalability and reliability for agentic workflows. This release includes breaking changes, new extensions, and security hardening, making MCP a more mature and production-ready protocol for enterprise AI applications.

Zig's Incremental Compilation Internals

https://mlugg.co.uk/posts/incremental-compilation-internals/dep_graph_0.png
The Zig compiler's incremental compilation feature allows for fast rebuilds by detecting changed code and recompiling only that, patching the resulting bytes into the output binary. The feature involves caching source files' generated ZIR, tracking dependencies between analysis units, and using a linked file abstraction to handle incremental linking.

Show HN: How far do I have to go to run into 100k people?

How far must a 5° slice go in each direction before it hits N people?

The Fabled Flatbreads of Uzbekistan (2015)

Pacing the frontier

https://www.pacingthefrontier.com/pacing-the-frontier-preview.jpeg?v=4
AI is progressing rapidly, posing unprecedented social and safety risks, and the world needs to develop AI responsibly and thoughtfully. To achieve this, international coordination and governance tools are necessary to pace AI progress and mitigate risks.

Discovering Cryptographic Weaknesses with Claude

https://www-cdn.anthropic.com/images/4zrzovbb/website/802260d34a0653f23fd4944fae43064df367aa44-1000x1000.svg
Researchers at Anthropic used Claude Mythos Preview to discover improved attacks on cryptographic algorithms, including HAWK and AES. These attacks significantly weaken HAWK and improve the speed of AES attacks, but do not currently affect production systems.

Interview with Boris Cherny [video]

New HIV vaccine shows unprecedented success in preclinical study

https://www.lji.org/wp-content/uploads/2024/06/Madeline-profile-scaled-e1742326332573-150x150.jpg
Scientists at La Jolla Institute for Immunology and Scripps Research developed an HIV vaccine that trains immune cells to see past HIV's defenses by prompting the body to make broadly neutralizing antibodies. The vaccine resulted in the best HIV-fighting antibody response ever seen in primates and human trials have now started.

How Do I Profile eBPF Code?

https://naveensrinivasan.com/flamegraph-ebpf-perf.png
To measure the performance impact of eBPF code, a simple C test harness is created to measure file open performance, discarding the first 10% of results as a warmup period. The perf tool is used to profile the eBPF code, resolving symbols to analyze where the issue is and pinpointing where optimizations are required.

Toolcraft

https://toolcraft.sh/_next/image?url=%2Fimages%2Fgallery%2Ftextures.jpg&w=3840&q=75&dpl=dpl_AgVMeficbNwyjQ4Uq3VgjZJXxJrK
Toolcraft gives AI an application architecture, not just components. It includes a working canvas, toolbar, layer system, timeline, and keyframe workflows, plus embedded AI skills, performance instructions, and visual testing rules to improve the quality and consistency of generated creative apps.

Show HN: XY – A Fast, composable, GPU-accelerated interactive plotting library

https://raw.githubusercontent.com/reflex-dev/xy/main/spec/assets/xy-sdf-binned-scatter.png
XY is a fast, interactive, and customizable Python charting library for web, notebooks, and static exports. It supports large datasets and offers features like hover, pan, and zoom.

Kimi Linear: An Expressive, Efficient Attention Architecture (2025)

https://arxiv.org/static/browse/0.3.4/images/arxiv-logo-fb.png
Kimi Linear outperforms full attention in various scenarios with superior performance and efficiency, reducing KV cache usage by up to 75% and achieving up to 6 times decoding throughput. It can be a drop-in replacement for full attention architectures with a pre-trained model and open-source code available.

Una GPS smart watch – Repairable, USB-C charging, developer-friendly

local_rate_limited

Hulios: An eBPF-powered, transparent Tor gateway for Linux

https://opengraph.githubassets.com/a7a8951c43451990428656d219967b0f3a3c218bc61ca055aec355701dbbdf16/ghaziwali/Hulios
Hulios is a Linux-based Tor VPN gateway that secures outbound traffic using eBPF and kernel socket level hooks. It implements robust leak-resistant boundaries and sandbox isolation to prevent IP leaks and data breaches.

Robotics development made dead simple (open source)

Hey everyone, It's a direct replacement for ROS 2. We already have the OpenArm robot (https://openarm.dev) working on the platform, both v1.0 and v2.0, plus Isaac Sim and MuJoCo integration. Our long term vision is to allow anyone (even non-devs) to go from a prompt to real humanoid robot actions, first in simulation, then on the physical robot.

Harmony Explained: Progress Towards a Scientific Theory of Music (2012)

https://arxiv.org/static/browse/0.3.4/images/arxiv-logo-fb.png
A music theory book is rewritten to present harmony as a scientific theory, considering physical and computational phenomena. The book derives three fundamental music phenomena: the Major Scale, the Standard Chord Dictionary, and the difference between Major and Minor Triads.

Anthropeum – Where in the world, and when, does this human artifact belong?

https://anthropeum.com/og-image.jpg
Players guess the origin and time period of 10 Met artifacts daily, with points awarded for proximity in both dimensions. Scores are then ranked on a distribution curve with other players who participated that day.

How to survive boiling water

https://substackcdn.com/image/fetch/$s_!nF_1!,w_1456,c_limit,f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F488c06c9-945f-46f4-b14d-e57146d81479_700x525.jpeg
A college student's abandoned milk carton became a 27-year dorm tradition, sparking a story about the value of discarded items. A scientist investigates a probiotic tea, discovering that its bacteria can survive boiling water due to spore-forming properties.

WOFF 1.0: a milestone on W3C's journey of fonts on the web

W3C's Web Fonts technology, starting with WOFF in 2010, revolutionized web typography by allowing custom fonts without DRM. The technology has evolved with WOFF 2.0 and now Incremental Font Transfer aims to improve font loading efficiency and support for complex scripts.