Fran Sans – font inspired by San Francisco light rail displays

The article is about Fran Sans, a display font inspired by San Francisco's light rail vehicle destination displays. The font's creator, Emily Sneddon, aimed to capture the unique charm and utility of the original displays.

Native Secure Enclave backed SSH keys on macOS

Show HN: I wrote a minimal memory allocator in C

https://opengraph.githubassets.com/c011fb1d63c4033608b6acf8a0d5eefd47ef5c58acd551b9ff59831d9edcedce/t9nzin/memory
This project implements a memory allocator using sbrk and mmap with optimizations like block splitting and coalescing, but it's not thread-safe. It's designed for POSIX-compliant systems like Linux and macOS.

µcad: New open source programming language that can generate 2D sketches and 3D

https://microcad.xyz/wp-content/uploads/2025/11/release-2.webp
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New magnetic component discovered in the Faraday effect after nearly 2 centuries

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Calculus for Mathematicians, Computer Scientists, and Physicists [pdf]

Calculus is a branch of mathematics that has been refined over centuries to solve various problems in physics and other fields. It has a theoretical foundation that allows us to speak of the infinitely large and infinitely small, and is guided by aesthetics and logical consistency.

A desktop app for isolated, parallel agentic development

https://raw.githubusercontent.com/coder/mux/main/docs/img/logo.webp
Mux is a powerful AI tool with features like Plan/Exec mode and vim inputs, but it's still in a Preview state with bugs and performance issues. It's free software under the GNU Affero General Public License, suitable for complex issues and development.

Shaders: How to draw high fidelity graphics with just x and y coordinates

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Racket v9.0

Racket 9.0 introduces Parallel Threads, a major addition to the language, and supports parallel threads with features like thread-wait and black-box wrapper. The release also includes AArch64 package distribution and improved syntax tracking.

Particle Life – Sandbox Science

https://sandbox-science.com/og-image.png
Discover Particle Life, an interactive and educational particle simulator to understand physical phenomena and particle system dynamics.

Show HN: Gitlogue – A terminal tool that replays your Git commits with animation

https://repository-images.githubusercontent.com/1092562478/b7704a1e-6920-40e7-b88a-fa8199773b33
gitlogue is a terminal tool that animates Git history with typing animations and syntax highlighting. It supports various themes, languages, and customization options.

Liva AI (YC S25) Is Hiring

https://bookface-images.s3.amazonaws.com/small_logos/6d577992606b8392c9619b8dffacec074b48668d.png
Liva AI is hiring a community growth intern to manage online communities like Discord servers or subreddits. The ideal candidate has experience growing and managing large online communities with fast response times and flexible schedules.

Sunsetting Supermaven

We recommend existing VS Code users migrate to Cursor Tab for improved autocomplete. Existing Neovim and JetBrains customers will continue to get free autocomplete inference.

Iowa City made its buses free. traffic cleared, and so did the air

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Mount Proton Drive on Linux using rclone and systemd

https://opengraph.githubassets.com/26e2c613cff4b788dfe07bdefbb76acfd56ab710bc150ce7a3b3ee8b07216280/dadtronics/protondrive-linux
This guide automates the process of mounting Proton Drive on a Linux system using rclone and systemd. curl -O https://downloads.rclone.org/rclone-current-linux-amd64.zip unzip rclone-current-linux-amd64.zip cd rclone-*-linux-amd64 sudo cp rclone /usr/local/bin/ sudo chmod +x /usr/local/bin/rclone If the script added you to the fuse group, you must log out and back in for the change to take effect.

A time-travelling door bug in Half Life 2

https://cdn.masto.host/mastodongamedevplace/media_attachments/files/115/589/872/869/803/006/small/811512981f638d11.png
A developer at Valve discovered a long-standing bug in Half Life 2 where a door wouldn't open due to a collision with a guard's toe, which was caused by differences in floating point precision between the original 8087 math and the newer SSE instruction set. The bug was present in the original game and was only fixed when the developers moved the guard back a millimeter, highlighting the ...

After my dad died, we found the love letters

https://bear-images.sfo2.cdn.digitaloceanspaces.com/herman-1683556668-0.png
The writer's father was a traditional Chinese man who hid his true self and lived a miserable life, but he had a secret three-year relationship with a man named Edward, who he planned to leave his wife for. The writer discovers this after their father's death and meets Edward, who shares their story and photos of a happy life together.

ISPs more likely to throttle netizens who connect through CG-NAT: Cloudflare

https://regmedia.co.uk/2025/09/01/shutterstock_global_networks.jpg
Cloudflare research found that Carrier-Grade NAT (CGNAT) is used more in Africa and Asia, causing biases in internet traffic and user experience. CGNAT's operational fallout can lead to innocent users being throttled or blocked due to a single user's malicious activity.

An Economy of AI Agents

https://arxiv.org/static/browse/0.3.4/images/icons/smileybones-pixel.png
Artificially intelligent agents may be deployed across the economy in the next decade with little human oversight. Economists need to consider how AI agents interact with humans and markets.

MCP Apps: Extending servers with interactive user interfaces

http://blog.modelcontextprotocol.io/posts/images/inline-chat-app.png
The MCP Apps Extension proposes a standardized pattern for interactive user interfaces in the Model Context Protocol, addressing a long-requested feature from the MCP community. This extension aims to improve user experience and prevent ecosystem fragmentation by enabling bidirectional communication between AI models and users.

1M Downloads of Zorin OS 18

https://assets.zorincdn.com/images/releases/upgrader/18-upgrader-testing-banner.jpg
Zorin OS 18 has broken records with 1 million downloads in over a month, mostly from Windows users. The OS is praised for its polish and ease of use, making it a great choice for ex-Windows users.

X's new country-of-origin feature reveals many 'US' accounts to be foreign-run

https://www.hindustantimes.com/ht-img/img/2025/11/23/550x309/X-OUTAGES--0_1763858923898_1763858955787.JPG
Elon Musk's X has introduced a feature showing account country of origin, revealing many US-based accounts are actually foreign-run. This has caused chaos online, with MAGA and Democrat circles accusing each other of being influenced by foreign entities.

Terence Tao: At the Erdos problem website, AI assistance now becoming routine

https://media.mathstodon.xyz/cache/preview_cards/images/029/665/620/original/425c218c0aeecc66.png
A human disproof of Erdos problem #367's second part was initially proposed, then confirmed by Gemini Deepthink using p-adic algebraic number theory. The proof was later formalized in Lean by Boris Alexeev in 2-3 hours.

Editing Code in Emacs

The author discusses efficient text editing practices in Emacs, focusing on minimizing keystrokes and using modal editing to move around the document. Keybindings and commands are explained, including moving by sexps, searching, and using registers to jump between locations.

"Good engineering management" is a fad

https://lethain.com/static/blog/2019/40-year-hero.png
The ideal leadership skills for engineering managers change with the business environment, and current morality tales about leadership are often driven by business realities rather than complex moral changes. To be effective across fads, engineering managers should focus on developing eight foundational skills: execution, team, ownership, alignment, taste, clarity, navigating ambiguity, and ...

Court filings allege Meta downplayed risks to children and misled the public

https://time.com/redesign/_next/image/?url=https%3A%2F%2Fapi.time.com%2Fwp-content%2Fuploads%2F2025%2F11%2FMark-Zuckerberg.jpg%3Fquality%3D85%26w%3D1800&w=3840&q=75
Meta allegedly tolerated sex trafficking on its platforms and had a high threshold for reporting such content. The company also resisted implementing safety features to protect young users, prioritizing growth and profits over their well-being.

'Invisible' microplastics spread in skies as global pollutant

https://p.potaufeu.asahi.com/bc66-p/picture/30225833/be01987aea2206480ab61a72c755b79c.jpg
Airborne microplastics are spreading globally, penetrating human bodies and sparking alarm among researchers. These tiny pollutants, often invisible, could be fueling extreme weather conditions and pose unknown health risks.

Doge 'doesn't exist' with eight months left on its charter

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Several core problems with Rust

The author criticizes Rust for its slow compilation speed, complexity, and lack of practicality. They argue that Rust's focus on memory safety comes at the cost of reliability and developer sanity.

Giving the Jakks Atari Paddle a Spin

https://nicole.express/assets/img/paddle/paddle.jpeg
Some things I like to talk about on this blog are “paddle” games that use a potentiometer to control the player position, and plug-and-play consoles. Oh, and the Atari 2600. Well, it just so happens that Jakks Pacific in 2004 released something that combines both of them: the Atari Paddle. It’s like they had this blog in mind. The Atari 2600 had a few different types of controllers used with ...