Organic Maps

https://organicmaps.app/sponsors/nlnet.svg
Organic Maps is a free, ad-free, offline GPS app for various activities, powered by OpenStreetMap data. It's developed by the open-source community with support from grants and donations.

Phosh 0.56.0

Phosh's new release includes improvements such as hiding apps on immutable distros and faster startup times. It also adds new panels and features like atomic OS updates and re-enabling hidden apps.

Introduction to Compilers and Language Design

This is a free online textbook on compiler construction by Prof. Douglas Thain, suitable for undergraduate students with C programming experience. The book offers a one semester introduction to building a simple compiler for a C-like language.

Cannabis Users Face Substantially Higher Risk of Heart Attack (2025)

https://www.acc.org/-/media/9E7FA8BE7B44449AB9993CC9237EF455.png
Two new studies found that cannabis users are more likely to suffer a heart attack than non-users, with a 50% increased risk among those who use the drug. Researchers recommend clinicians ask about cannabis use to understand patients' cardiovascular risk and warn users of potential risks.

If you're a button, you have one job

https://unsung.aresluna.org/_media/if-youre-a-button-you-have-one-job/ogimage.png
You're concerned that your interactive essay may appear old-fashioned, but its challenges are universal. A predictable and pleasant interface is essential, even for casual users, to avoid situational disability and power user-ness.

Medieval-style fortifications are back in the Sahel

https://www.economist.com/cdn-cgi/image/width=1424,quality=80,format=auto/content-assets/images/20260627_MAP506.jpg
The Benin state in southern Nigeria built massive earthworks, second only to China's Great Wall, showcasing its powerful civilization. The empire eventually collapsed under British invasion, leaving behind only remnants of its once-mighty walls.

Airplane Boneyards List and Map

https://airplaneboneyards.com/images/walnut-ridge/walnut-ridge-aircraft-boneyard-store-post-wwii-sm.jpg
The United States and other countries have airplane boneyards where surplus aircraft are stored, maintained, and scrapped, with facilities in Arizona, California, and New Mexico. These boneyards serve as temporary storage, maintenance, and parts reclamation sites for commercial airliners and military aircraft, with some facilities also offering tours.

Shadcn/UI now defaults to Base UI instead of Radix

https://ui.shadcn.com/_next/image?url=%2Fimages%2Frhea-light.png&w=3840&q=75&dpl=dpl_EEsyiWuonzGkyNCanptY2cnVtzze
Shadcn/ui has rebuilt every component for Base UI, keeping the same abstraction, and letting users choose between Radix and Base UI. New projects default to Base UI, and a migration skill is available to help users migrate their existing projects from Radix to Base UI.

Show HN: KiCad in the Browser

https://demo.pcbjam.com/og/og-demo.png
The list contains various electronic components and modules. It includes amplifiers, converters, CPLDs, CPUs, devices, diodes, displays, drivers, DSPs, fiber optics, filters, FPGAs, GPUs, interfaces, isolators, jumpers, LEDs, logic, MCUs, memory, motors, oscillators, potentiometers, power management, regulators, relays, RF components, sensors, switches, timers, transformers, transistors, and valves.

Trust your compiler: Modern C++

https://categorica.io/_app/immutable/assets/ctg_icon.CcTidov5.svg
Modern C++ compilers and libraries can often optimize code more effectively than hand-written "clever" code, making it easier to write straightforward and efficient code. By using modern C++ features and standard library functions, developers can express their intent directly and let the compiler and library do the optimization work.

Claude Design System Prompt

https://opengraph.githubassets.com/0b72473d0b6cf46520b1e6f7cadfce94c386c63c03122c6b769ddcfaee23ad0a/Trystan-SA/claude-design-system-prompt
This system prompt and skill library turns an LLM into a design collaborator with an explicit design philosophy and procedural skills. It's open source, MIT licensed, and can be used with various LLMs, including Claude, GPT, and Gemini.

Pandoc Lua Filters

Pandoc supports filters written in Lua without external dependencies, allowing for efficient manipulation of the pandoc abstract syntax tree (AST).

Fast Software, the Best Software (2019)

https://craigmod.com/images/about/craigmod-headshot-2025-small-01.jpg
The user values fast software that is both functional and intuitive, citing examples of speedy applications like nvALT, Sublime Text, and Figma, which provide a smooth user experience and allow for efficient workflow. Slow software, on the other hand, can be frustrating and lead to decreased productivity, as seen in examples like Google Maps, iTunes, and older versions of Adobe Photoshop.

Knowledge Should Not Be Gated

https://www.formaly.io/knowledge-should-not-be-gated.png
The author argues that traditional approaches to knowledge management, such as retrieval-augmented generation, have gated knowledge behind infrastructure and made it unreadable.

Spain's cadastre API is SOAP from 2003, so I built a JSON wrapper (+MCP)

Predio es un servicio que proporciona datos catastrales españoles estructurados y predecibles en formato JSON, sin necesidad de SOAP/XML. Puedes autenticarte con una cabecera x-api-key y pagar por informe o por uso, con precios legibles por máquina.

Jellyfish can heal wounds in minutes. Scientists want their secrets

https://www.mbl.edu/sites/default/files/styles/medium/public/2026-06/clytiaeditedtoremovenumbersRESIZED.jpg?itok=hmafHZfP
Clytia hemisphaerica jellyfish have transparent bodies allowing researchers to study wound healing in real time. Scientists can observe epithelial cells stitching damaged tissue back together, revealing conserved mechanisms of wound healing across different species.

Megawatts by Microwave

https://computer.rip/static/img/bpa/1.png
The US Army Corps of Engineers and the Bureau of Reclamation built dams on the Columbia River for various reasons, including irrigation, electricity, and national defense. The Bonneville Power Administration (BPA) was formed to distribute power from these dams, creating a regional power grid and pioneering modern electricity pricing and distribution.

Pi square is nearly 10

https://mihai.page/imgs/logo_600.png
The user discusses the number tau, pi, and their approximations. They explore the Basel problem and its relation to the approximation of pi squared being close to 10.

The GNU Emacs Architecture: Unlocking the Core [pdf]

GNU Emacs is a text editor that has been in development since the 1980s and is known for its user-extensible and self-documenting design that ties back to the free software philosophy. A thesis aims to aid future work in modernizing Emacs by providing a foundation of comprehensive and accessible documentation covering the internal architecture of GNU Emacs, focusing on components related to ...

Moby Dick Workout (2022)

You test productivity apps with large texts like "Moby Dick" to ensure they handle user-generated content. If an app passes this test, it may be suitable for your needs, but failing doesn't necessarily mean it's bad.

Command and Conquer Generals natively ported to macOS, iPhone, iPad using Fable

https://private-user-images.githubusercontent.com/159876365/617135099-aeaf6692-36e6-40c8-b9f8-8066d014ec4b.gif?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3ODMxOTUyMDksIm5iZiI6MTc4MzE5NDkwOSwicGF0aCI6Ii8xNTk4NzYzNjUvNjE3MTM1MDk5LWFlYWY2NjkyLTM2ZTYtNDBjOC1iOWY4LTgwNjZkMDE0ZWM0Yi5naWY_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjYwNzA0JTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI2MDcwNFQxOTU1MDlaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT0yNDBjM2ExZDU0YzZmN2Q5M2NhNmFlMTk1ZTg0ZmI0ODY3Y2I4N2Q2MjAxYTgzZjA3ODJiYjc0Nzc1ZWJiZjg3JlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCZyZXNwb25zZS1jb250ZW50LXR5cGU9aW1hZ2UlMkZnaWYifQ.3RG-XHsmRzmhc6nyNFA6DFywAMia98mihfWcI29Dirk
Command & Conquer Generals: Zero Hour runs natively on Apple devices with real 2003 engine, using DXVK/MoltenVK and touch controls. Requires own game assets and Apple Developer team for iOS build.

Artful Cats: Feline-Inspired Art and Artifacts

Request verification Please continue when verification is complete.

Meta's Un-Stable Signature

The user investigated three AI-based invisible watermark algorithms, SynthID, TrustMark, and Stable Signature, and found that they all make the same fundamental mistake of assuming independent and uniformly distributed bits, leading to inflated accuracy rates and high error rates. The user's empirical testing and statistical analysis revealed that these algorithms have error rates of around ...

Functional Programming in hica

https://www.hica.dev/assets/hica-logo2.png
hica is a functional programming language that uses immutable data, expressions, and functions as first-class values. It promotes pure functions, recursion, and algebraic data types to make code easier to test, name, and reuse.

The Log is the Agent

https://arxiv.org/static/browse/0.3.4/images/arxiv-logo-fb.png
ActiveGraph inverts the typical agent framework arrangement, with an append-only event log as the source of truth and a working graph as a deterministic projection. This design provides deterministic replay, cheap forking, and end-to-end lineage, making it well-suited for self-improving agents.

What ORMs have taught me: just learn SQL (2014)

The user has had negative experiences with Object-Relational Mappers (ORMs) and believes they should not replace SQL, but rather augment it. They recommend learning SQL to write efficient queries and manage database interactions, and suggest using templated SQL or stored procedures for complex queries.

Atomic Force Microscope [video]

“Beyond the limit”: Satellites and mirrors in space pose threat to the night sky

https://cdn.eso.org/images/newsfeature/eso2607a.jpg
A new ESO study warns that launching 1.7 million satellites would devastate astronomy, recommending no more than 100,000 faint satellites to safeguard night sky observations.

GPT-5.5 Codex reasoning-token clustering may be leading to degraded performance

https://opengraph.githubassets.com/099e4c84e3b8a7191641778b799c670095fb15e7827f947ecb81b7c509907ec0/openai/codex/issues/30364
GPT-5.5 responses disproportionately cluster at 516 reasoning tokens with related spikes at 1034 and 1552. This pattern suggests a possible reasoning-budget or truncation behavior in GPT-5.5.

About the Digital Art

https://www.tricivenola.com/wp-content/uploads/2019/07/7.jpg
The author discovered digital art on the 128K Macintosh in 1984 and created popular clip art and comics using MacPaint. She learned through trial and error, not manuals, and eventually worked with Disney, Paramount, and other top studios, but still questions where artistic talent comes from.