hn30
Daily dispatch · 22 Sep 2026
1. Xiaomi MiMo v2.6 (mimo.xiaomi.com)
2. Spymarks, Not Watermarks (brand.io)
A new kind of hidden watermark, dubbed a "spymark," can secretly track users through images, audio, and text without consent. The article explains how this technology works and why it's a serious privacy threat.
3. Transformers Explained Visually (poloclub.github.io)
Transformers are neural networks that power models like GPT by predicting the next token using self-attention, and this article breaks down their key components—embedding, transformer blocks, and output probabilities—using GPT-2 as an example.
4. What Sun Got Wrong (bcantrill.dtrace.org)
The Oxide team is gathering in Emersonville for OxCon, sporting retro computer company homage t-shirts, including one that stirred Sun nostalgia. The team reflects on Sun's legacy—both its achievements and failures, particularly a 2005 incident where Sun failed to convert open-source success into sales while Dell seized the opportunity.
5. Attention is all you have (alicegg.tech)
The Tetris effect shows that what we focus on shapes our thoughts. Today's recommendation algorithms hijack that same power, curating our attention through doomscrolling and ad-driven content. But you can take back control by choosing intentional browsing—reading blogs, using RSS feeds, and engaging with content deliberately rather than passively consuming whatever the algorithm serves.
6. I don't want to read what you didn't write (blog.colinbreck.com)
AI is making us all write more, but the result is often unreadable, context-free drivel — while the few who use it well treat it as a thinking tool, not a replacement for human voice and lived experience.
7. PDF Forgeries Are Surprisingly Rare (2022) (gwern.net)
Fraudulent edits to existing PDFs are surprisingly rare despite being technically easy, as most people treat PDFs as "write-only" formats and attackers prefer simpler targets like images or Word documents for deception. The article explores why authentic PDFs remain trusted online while other file types are routinely manipulated.
8. The NASA/ESA Mars Sample Return mission has been canceled (science.org)
9. AI coding has made CI a bottleneck, so we reworked ours to keep up (linear.app)
Linear cut CI wait times and runner costs by upgrading infrastructure, optimizing critical-path jobs, reducing repeated setup, and making test execution more efficient. Despite a quadrupled test suite, PR wait time dropped from over 6 minutes to just over 5, while runner time per test roughly halved.
10. Claude Status – Elevated errors for multiple models (status.claude.com)
A service issue from 5:50pm-7:10pm PT on September 22 affecting Claude models and related services has been resolved, with success rates returning to normal and ongoing monitoring in place.
11. Looking forward to Git 2.56 – and 3.0 (lwn.net)
Git 2.56 is out with modest improvements, but the bigger news is the likely upcoming Git 3.0, which would switch to SHA-256, reftables, and require Rust.
12. Divide by Depth for Instant 3D (gabrieloc.com)
An exploration of how simple depth division math forms the foundation of 3D camera projections, evolving into the full perspective projection matrix pipeline used in modern graphics. The article demystifies the transformations from world coordinates to screen pixels through clear examples and practical breakdowns.
13. Where Rust actually is in Windows 11 (hunterworks.software)
A census of Windows 11 25H2 finds Rust in two unpublicized servicing DLLs and measures DWriteCore at 57.9% Rust, while the kernel driver’s Rust region gate sits in the C++ host. The piece details the evidence and methods behind each count.
14. Socrates vs. the Written Word (2011) (wondermark.com)
A look at ancient and modern gripes about new technology—from Socrates on writing to 1890s worries about the telephone—suggests the curmudgeonly impulse is timeless.
15. The Advisory Group on Mathematics and Artificial Intelligence (terrytao.wordpress.com)
Mathematicians from leading institutions have formed an independent advisory group at the Institute for Advanced Study to guide AI companies on responsible interactions with the mathematical community and the release of AI-generated mathematical results.
16. First Shader from Zero in Godot 4 (gdquest.com)
Learn to code your first 2D shader in Godot 4 by building an animated portal step by step, covering shapes, smoothstep, masks, noise, and textures. No shader experience needed, just basic GDScript and Godot editor knowledge.
17. Truman World (trumanworld.live)
A system for keeping Truman unaware he’s in a TV show, with decision and camera modules, though key features like telemetry and memory are currently unavailable.
18. Epoll and Kqueue: How Operating Systems Learned to Wait Efficiently (thecodinggopher.substack.com)
Modern servers rely on epoll and kqueue to efficiently manage thousands of connections by switching from CPU-intensive polling to lightweight event notification, making idle waiting nearly free. These APIs let the kernel track readiness so applications only wake when data is ready, not when they repeatedly ask.
19. How do traffic signals work? (2019) (practical.engineering)
Traffic signals are sophisticated systems balancing safety, efficiency, and conflicting demands at urban intersections, using everything from basic timing to adaptive algorithms that coordinate entire city networks.
20. Frontier AI on Your Own Hardware (timdettmers.com)
The author counters student fears about AI job displacement by arguing academia is poised for a renaissance, with research shifting from papers to integrated ecosystems. They're backing this claim with a week of open-source releases designed to make frontier AI tools accessible on modest hardware.
21. More Floating Point Alternatives (wizardzines.com)
Software-based alternatives to standard binary floats exist for exact or error-tracked math, including decimal floating point, fractions, symbolic computation, interval arithmetic, and binary-coded decimal. These options are slower but offer precision for specialized needs like financial transactions or computer algebra.
22. Kev: Tiny Jev-like family of decision models built on top of Qwen3.5 (github.com/jaredpalmer/kev)
Small decision models based on Jev's architecture that you can run locally with training code included. Supports 0.8B, 4B, and 9B parameter sizes with yes/no, multiple-choice, and rating questions processed simultaneously through a TypeSafe-compatible API.
23. Paper Models of Polyhedra (polyhedra.net)
This site offers hundreds of free paper models of polyhedra, from Platonic solids to kaleidocycles, with nets for each. Just click a picture to access the model page and make it yourself.
24. Python Workers are now generally available (blog.cloudflare.com)
Python Workers are now generally available on Cloudflare, making Python a first-class language on the platform. Developers can run FastAPI, Django, Flask, and AI libraries with native access to Cloudflare bindings like R2, D1, and Hyperdrive.
25. Turn off and restrict access to Apple Intelligence features on Mac (support.apple.com)
Learn how to turn off Apple Intelligence features on your Mac, including Siri AI, message and email summaries, and notification summaries. The guide provides step-by-step instructions for disabling each feature individually.
26. Grok 4.7 (x.ai)
Grok 4.7 is xAI's new flagship model, offering improved coding and knowledge-work performance with stronger safeguards at the same price as Grok 4.6. It's available now in Cursor, Grok Build, and via API.
27. This Digital Radio Gets Messages to the World’s Remotest Locations (spectrum.ieee.org)
Shortwave radios can connect remote areas with minimal infrastructure, but their data rates are usually low. A new open-source system called HERMES boosts these rates and adds encryption, helping remote communities send files and even coordinate rescues.
28. Apple Copland D11E4 Booting in the Browser (pagetable.com)
Apple's long-abandoned Copland OS, now runnable in browser emulation via the last build D11E4, finally lets enthusiasts test the legendary unreleased system—try GXSlidemaster or Eric's Solitaire through improved DingusPPC.
29. Why Does an NPM Math Library Need an Encrypted Loader? (safedep.io)
A remote access implant was discovered hidden inside the npm package [email protected], which mimics the popular mathjs library by embedding malicious code that activates when specific matrix data is passed through its solver, using encryption and a blockchain-based command channel for covert communication.
30. TXR: An Original, New Programming Language for Convenient Data Munging (nongnu.org)
TXR is a dual-purpose text scraping and data processing language with a powerful Lisp dialect, now at version 302. The project's site highlights its small footprint, optimizing compiler, and community solutions, while warning against Homebrew builds.