Ghostmoon.app – The Swiss Army Knife for your macOS menu bar

Ghostmoon is a pre-release app that provides system control and utility features for macOS, including display management and network tools. It requires Gatekeeper approval or Terminal command to run, with optional donation for additional features.

The curious case of retro demo scene graphics

https://www.datagubbe.se/aipixels/g/lazur_l.jpg
The demo scene initially tolerated copying due to technical limitations, but as it evolved, artists began to value originality and craft over plagiarism. Today, many sceners reject AI-generated art and plagiarism, valuing the creative process and technical limitations that define the scene.

Mathematical methods and human thought in the age of AI

https://arxiv.org/static/browse/0.3.4/images/arxiv-logo-fb.png
AI is a natural evolution of human tools, facilitating idea creation and dissemination. Its development should remain human-centered to enhance quality of life and expand human thought.

I use excalidraw to manage my diagrams for my blog

https://blog.lysk.tech/assets/images/export.dark.exp-252e0eacdb94f7d74ecc629f7c4ea4da.svg#gh-dark-mode-only
User created an Excalidraw extension to generate SVGs for light and dark mode, but it caused frustration due to dependency on text changes. They then created a new extension that automatically exports frames as SVGs in both modes, allowing for local review and reference.

ChatGPT won't let you type until Cloudflare reads your React state

Cloudflare's Turnstile program collects 55 properties from a user's browser, including font measurements, storage, and React application data, to verify the user is running a real browser with a fully rendered ChatGPT application. The program uses a custom VM with a server-generated XOR key to collect and encrypt the fingerprint data, which is then sent as the OpenAI-Sentinel-Turnstile-Token ...

Hamilton-Jacobi-Bellman Equation: Reinforcement Learning and Diffusion Models

https://dani2442.github.io/posts/continuous-rl/continuous_rl.drawio.svg
A seminal 1952 paper lays the foundation for optimal control and reinforcement learning. bellman extended his work to continuous-time systems, turning the optimal condition into the pde. he estimates $v_kapprox valpha_j$ by monte carlo rollouts of the closed-loop sde and fits $v_theta$ via regression. $$ learned value function matches the exact power-law $

VHDL's Crown Jewel

https://www.sigasi.com/img/logo-circle-semicolon.svg
VHDL's delta cycle algorithm preserves determinism in a concurrent language by separating signal value updates and process evaluations into distinct phases. In contrast, Verilog's nonblocking assignments do not solve the problem of non-determinism in general, although they can provide determinism in synchronous designs.

Voyager 1 runs on 69 KB of memory and an 8-track tape recorder

https://techfixated.com/wp-content/uploads/2025/04/0913-VOYAGER-1-sized-860x573.jpg
Voyager 1, a 48-year-old spacecraft, is still functioning and transmitting data from interstellar space despite having only 69 kilobytes of memory and an 8-track tape recorder. It has made numerous discoveries and is now the most distant human-made object in the universe, carrying a golden record with sounds of Earth for potential extraterrestrial life.

Comprehensive C++ Hashmap Benchmarks (2022)

https://martin.ankerl.com/img/2022/wanderfalke_edit.jpg
It’s been over 3 years since I’ve spent considerable time finding the best C++ hashmap. After several requests I finally gave in and redid the benchmark with state of C++ hashmaps as of August 2022. This took much more work than I initially anticipated, mostly due to the fact that benchmarks take a looong time, and writing everything up and creating a representation that is actually useful ...

Copilot edited an ad into my PR

https://notes.zachmanson.com/media/copilot-hell.png
A team member used Copilot to edit a PR description, adding ads for itself and Raycast. This is seen as an abuse of the platform's features for self-promotion.

15 Years of Forking

https://www.waterfox.com/images/logos/2011-14.png
The creator of Waterfox, a 64-bit Firefox build, shares its 15-year history, from 50,000 downloads to 1M monthly active users. Despite financial struggles, the browser remains independent and committed to user privacy.

Ninja is a small build system with a focus on speed

https://opengraph.githubassets.com/c2c61fd09dc5fb3e9eb1cc4980ddcc25a2ab42c0821ad972daf99a77aea1c6ba/ninja-build/ninja
Ninja binaries are available on GitHub for Linux, Mac, and Windows. To use Ninja, run ./ninja -h for help or copy misc/ files for features like Bash completion.

C++26 is done: ISO C++ standards meeting Trip Report

https://herbsutter.com/wp-content/uploads/2026/03/wg21-2026-std.png
The ISO C++ committee completed technical work on C++26 in London, resolving international comments and producing a final document for approval. C++26 features include reflection, improved memory safety, and language contracts.

How A Spartan Revolutionized Baseball

https://msu-p-001.sitecorecontenthub.cloud/api/public/content/d2c2d286fd3d4d6b804a3f62ab7c06a4?v=90ae729a
Danny Litwhiler, a former Michigan State University Baseball Coach, developed over 100 inventions and innovations, including the pitch speed radar gun. His creative mindset began as a player and continued through his coaching career, shaping the game of baseball.

Douglas Lenat's Automated Mathematician Source Code

https://opengraph.githubassets.com/814226ecc2e81d4ea31c63b5471086e5ace0b856242775d29099ceb1ebf3e7ac/white-flame/am
Files extracted from SAILDART archive include LT, TA, TB, TOP6, and CON6, with documentation and logs to be committed. The software is in the public domain, funded by the USA government through ARPA.

Philly courts will ban all smart eyeglasses starting next week

https://www.inquirer.com/resizer/v2/ZYTTGRGRHQAYUQC74BRYSUUWLM.jpg?auth=e58a0422a5f8055223ad67bce9ff075ea716c81c4b24db6498dc3945780b7930&width=760&height=507&smart=true
Philadelphia courts ban smart eyewear with recording capabilities due to potential witness and juror intimidation. Those caught attempting to bring smart eyewear into courtrooms may be barred entry or arrested for criminal contempt.

Ask HN: Where have you found the coding limits of current models?

I'd love to hear where you've run into the limits of current coding models, whether it's based on lines of code, systems integration, databases, etc. I found sonnet 4.5 struggled with a two pointer interval merge (two sorted lists of things with start stop timestamps), but opus 4.5 managed. Then it took opus 4.6 to make it a three way or k way merge. So it reminded me of the ...

Hardware Image Compression

https://www.ludicon.com/castano/blog/wp-content/uploads/2026/03/afrc-card-800x420.jpg
Real-time texture compression is exciting because it allows new hardware formats to be adopted without waiting for content to be created targeting them, and it's a lot easier to introduce new hardware formats. Native hardware compression is a compelling alternative to real-time compression, but it's currently limited to modern high-end devices and has varying quality across vendors.

My MacBook keyboard is broken and it's insanely expensive to fix

Laptop keyboard became too sensitive and unusable after cleaning. I remapped arrow keys using Karabiner Elements to avoid expensive repair.

The First Video Game Was Just a Box in the Corner of a Bar

https://s26162.pcdn.co/wp-content/uploads/2026/02/pong.jpg
Pong, a simple video game, was invented in 1972 by Nolan Bushnell and Allan Alcorn, and it became a huge success, launching the video game industry. The game's simplicity and market awareness made it ubiquitous, winning broad social acceptance and paving the way for Atari's success.

Coding agents could make free software matter again

https://www.gjlondon.com/wp-content/uploads/2026/03/absolute_buffoon_meme-7.jpg
The author believes AI coding agents will make free software matter more than ever, giving users the freedom to run, study, modify, and share software, and that this shift will make software freedom more practically relevant for everyone, not just technical enthusiasts. The author thinks new models are needed that combine the customization benefits of free software with the convenience of ...

Pretext: TypeScript library for multiline text measurement and layout

https://opengraph.githubassets.com/4b5b79060fa496a48a0935ad5c608599cf62425e161655d66304682b48dda5eb/chenglou/pretext
Pretext is a JavaScript library for multiline text measurement and layout, supporting various languages and rendering to DOM, Canvas, and SVG. It provides APIs for text analysis, measurement, and layout, allowing for efficient and accurate text rendering with features like shrink wrapping and manual line layouts.

Midnight train from GA: A view of America from the tracks as airports struggle

https://dims.apnews.com/dims4/default/b518e1d/2147483647/strip/true/crop/3000x2000+0+0/resize/599x399!/quality/90/?url=https%3A%2F%2Fassets.apnews.com%2F0c%2Fab%2F6d7fbedda11d85a7f8c6fc8338bb%2Fb6c9dd479b824aeca753f92bf424b1d7
The writer took a 14½-hour train ride from Atlanta to Washington due to a government shutdown that caused airport chaos. Along the way, they reflected on how politics affects daily life and saw the diversity of America's collective experience.

Eclipse GlassFish: This Isn't Your Father's GlassFish

https://foojay.io/wp-content/uploads/2026/03/oracle_glassfish_comparison_infographic-1024x682.png
Eclipse GlassFish has evolved into a robust, enterprise-grade platform with commercial support and frequent updates. It now supports modern Java standards, lightweight deployments, and is suitable for production environments.

15 years, one server, 8GB RAM and 500k users – how Webminal refuses to die

Webminal.org is a free Linux terminal practice site that has survived 15 years with 500k users, despite being built on outdated tech. It's maintained by two developers who met online and have kept it free, relying on personal savings to cover server costs.

The Cognitive Dark Forest

The internet has become a consolidated space where corporations and governments control information, making it a bleak future for innovation and creativity. The rise of AI has made execution cheap, but also allows large corporations to absorb and replicate individual innovations, making it safer to stay silent and not disrupt.

Show HN: The Alphabetical Clock

This clock displays the current time alphabetically. It is inspired by this post on Mastodon. In Three-Hand mode, the hours, minutes, and seconds are each independently sorted by their English spelling, with a hand for each.In Combined mode, every possible time (43,200 of them) is spelled out, sorted alphabetically, and a single needle points to the current one.

The road signs that teach travellers about France

https://ichef.bbci.co.uk/images/ic/480xn/p0n961kw.jpg.webp
France's brown motorway signs have promoted the country's history, culture, and identity for over 50 years, directing drivers to monuments, vineyards, and national sites. The signs, designed by Jean Widmer and others, have become an open-air gallery showcasing France's heritage and local industry.

"Roadrunner": a bipedal, wheeled robot for multi-modal locomotion [video]

Interview: Nobonoko, Master of the Minimal Sequencer

https://fi-le.net/nobo/beepbox.png
The user discusses the music of nobonoko, a contemporary artist who creates music using the simple BeepBox-like software, and contrasts it with the commercial music industry where artists like Bad Bunny are successful due to their topical politics rather than their musical skill. The user interviews nobonoko, who reveals his influences, creative process, and DIY approach to music and art, and ...