Local Wikipedia: Wikipedia, but only for things a half hour walk from you

https://edjefferson.com/localwiki/logo.png
If there are fewer than 25 things close to you, it takes the closest 25 things within about 6 miles. If there are more than 500 things only the closest 500 will be included.

The same AI request emits 8.5 times more CO2 in Texas than in Sweden

https://berget.ai/images/blog/per-request-co2-press-release/cover.png
Berget AI releases an open-source method to calculate carbon emissions of every individual AI request, allowing customers to track and compare their own emissions. The method is free for anyone to use, aiming to increase transparency in the industry and encourage buyers to choose lower-carbon options.

Docker is weird

The author learned about Docker's inner workings, discovering it's not just a single feature but rather 5 Linux kernel features combined. They also found the challenges of writing their own container runtime due to Go's design choices and Linux API requirements.

LLMs are making formal software verification feasible at a much larger scale

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Researchers have developed a method using large language models to prove the security of software at scale, enabling new development workflows with proven security guarantees. This approach can detect and fix bugs in widely used open-source libraries.

How does Fable 5.1 hide messages in images?

https://res.cloudinary.com/lesswrong-2-0/image/upload/v1792123168/lexical_client_uploads/rhbbcsivk5fap1xrfl2y.png
Fable 5.1, a language model, can generate artistic images using SVG and hide messages within them. The model encodes the message by altering attributes such as height of objects in the image to represent letters of the alphabet. A separate instance of Fable can recover these hidden messages from rendered images without knowing the encoding method used.

The foolishness of "natural language programming" (1978)

The author argues that using natural languages to program computers would not simplify human life, as it would increase the machine's burden and require significant changes in how we communicate. Formal symbolism is a more effective tool for ruling out nonsense, allowing humans to learn complex concepts earlier.

The HTML-in-Canvas API origin trial

https://developer.chrome.com/static/blog/html-in-canvas-origin-trial/image/thumbnail.png
The HTML-in-Canvas API allows developers to draw DOM content directly into a 2D canvas or WebGL/WebGPU texture while keeping the UI interactable and accessible. This new experimental API lets you combine HTML with low-level graphics processing, creating experiences that were previously impossible.

This I Believe (1952)

https://www.awakin.org/pics/rand/smile-balls.jpg
User shares thoughts on values, believing in goodness and helping others, with examples of personal experiences showing that kindness prevails. They emphasize the importance of starting small and trusting others to create a positive impact.

The alien space of science: Coherent but cognitively unavailable directions

https://arxiv.org/static/browse/0.3.4/images/arxiv-logo-fb.png
Researchers created a method to generate novel scientific ideas by combining existing concepts and methods in new ways, while avoiding directions already explored by the research community. The approach produced more diverse portfolios of ideas than existing language models, with human evaluation showing it matched or exceeded their quality.

OpenShell – A safe, private runtime for fleets of autonomous AI agents

https://opengraph.githubassets.com/89d300dde1a78bee22c33bed76898d74e2dc7a2ded32d04ca14c51621a28129a/NVIDIA/OpenShell
OpenShell 0.1.x introduces a stable release cadence, new isolation primitives, and expanded APIs for secure autonomous AI agent execution. It enforces policies on file access, system calls, and network connections using kernel-level enforcement and formal verification.

Every AI model has the same "controversial" take on humans

https://www.modelcompare.ai/blog/ai-models-controversial-take-on-humans/drawn-gpt-6.1-sol.webp
AI models from 10 labs in 3 countries agree that humans prioritize belonging over truth, with most saying people conform to group norms and create justifications for their actions.

Show HN: OnKey – I'm a bad singer, so I built an app to show where I'm off-key

https://camo.githubusercontent.com/e76e6ba9648be3d0b5f61a0469a06ef25621dc69f3d0f91fd9581b77a06307ed/68747470733a2f2f6d656469612e73696e676f6e6b65792e6170702f6f6e6b65792d6c616e652d322e676966
OnKey is a free, open-source singing trainer for Mac that learns songs from user input and provides real-time feedback. It uses various models to separate vocals from music and track pitch, with no account or analytics required.

Run full iOS 16.5 firmware on Android Devices

HackiOS boots iOS 16.5 on Android phone hardware using an open-source XNU kernel and custom drivers, allowing users to run unmodified iOS apps without modifying the original code. The project is a research bench, not a ROM, and requires specific hardware and software configurations.

Jank – The native Clojure dialect with seamless C++ interop

https://jank-lang.org/img/logo-transparent.png
jank's native build system can find your installed native dependencies or build them from source. Adding a new dependency is a one line change. jank brings functional, immutable data and REPL-driven development to your game development workflow. With jank, you can reach into C++ whenever you want the extra performance. No bridges, no function/type registration, no marshalling, no callbacks.

A lost Schrödinger manuscript reveals a twist in quantum physics

https://www.sciencealert.com/images/2026/10/schrodinger-642x361.png
A 1940s manuscript by Erwin Schrödinger reveals his early belief in indeterminism, contradicting the common perception of him as a determinist. The document proposes a hidden-variable model that could predict quantum behavior without randomness.

Getting ready to operate GNU Taler in Germany

Taler Operations AG is being founded to operate Taler as an online payment system in Germany and the Euro-zone, with plans to apply for a licence from BaFin. The new company will focus on Taler exclusively, enabling payments with Taler first in Germany before expanding across the single market.

Quad9 to exit France

https://quad9.net/news/blog/au-revoir-france/french-announcement-image.png
Quad9 will stop offering its free cyberprotection service to users in France due to a court ruling against it. The decision is a matter of principle for Quad9, which cannot comply with the ruling while remaining faithful to its mission.

WorldTUI: I trained a 360M model to pretend to be a terminal

https://simedw.com/2026/10/21/world-model-terminal/images/worldtui-cowsay.jpg
A 360M-parameter language model was fine-tuned to act as a terminal, predicting screen changes with every keypress. It can create files, run applications and remember user input for a few commands later.

We have traits at home

https://www.axelmagn.com/blog/202610-zig-traits/so_good.png
The author shares insights on abstractions in Zig, specifically using interfaces and comptime duck typing for runtime polymorphism. They propose a new convention for defining compile-time type contracts as Traits, inspired by functional programming and OCaml modules.

Objects, attributes, maps, oh my

The author discusses how dynamically typed programming languages model objects as unordered maps of attributes, which can lead to slow performance due to indirection and hashing. To optimize this, they introduce a "map" data structure that stores attributes in-line on the object, allowing for fast reads and writes.

Tell HN: I unknowingly broke the PHP RCE embargo. I am sorry.

Sorry

Color Names

https://names.color.pizza/og.jpg
Color Names Color Names is an open, community-grown collection of unique, human-authored color names. Free to use under the MIT license, available as an npm package or through the API. Adopt a color to support my work. Pick your favourite, open it and hit Adopt this color: from $5, with your name on it for good. Each color can be adopted only once.

Why my Asus laptop kept rebooting after sleep and how to fix it

https://cdn.idiallo.com/apple-icon.png
The author of an Asus Zenbook Pro 17 laptop experienced frequent restarts due to a faulty Wi-Fi adapter, specifically the MediaTek MT7922. The issue was resolved by updating the driver and disabling its power-saving sleep mode, preventing system crashes and abnormal battery drain.

Rule 30: one black cell

https://www.wolframcollatzmahler.com/share/rule30.png
Rule 30 is a simple program that generates random-like behavior, and Stephen Wolfram has offered $30,000 in prizes for answers to three questions about its centre column. The column's properties are still unknown.

Show HN: Making a smart TV dumb and then smart

https://opengraph.githubassets.com/ef2828e7f833259357f6b22ad638bd2efd1b04ebe0e269c99da96eafa47c3383/anubhavmalhotra/r2d2-tv
A project enabling a local home screen, private browser, and voice assistant on webOS TVs via custom firmware patches. It requires root access, specific hardware, and is unsupported, with risks of bricking the device.

Xbox wants you to pay 24 to 40 cents per hour to stream games you bought

https://cdn.arstechnica.net/wp-content/uploads/2026/10/xcloud3-640x360.jpg
Microsoft has rolled out a new service allowing non-subscribers to purchase cloud playtime hours for games they own, priced at 24 cents per hour. This model is similar to old arcades but differs from Xbox Game Pass subscriptions and Google's Stadia streaming experiment.

eMudhra to exit global SSL/TLS certificate business

https://emudhra.com/images/press-release/thumbs/emudhra-to-exit-global-ssl-tls-certificate-business.jpg
eMudhra Limited, a global digital trust company, has decided to withdraw from the SSL/TLS certificate business due to increasing data sovereignty and compliance requirements. The decision is made after careful consideration of the impact on its shareholders and focus on core enterprise solutions.

Hedra is a 3D open world game I wrote from scratch while in highschool

https://camo.githubusercontent.com/ae72be1dd477d1f5acbae14f1f03f7d856b2a995b811a10aeba8392780b5e3cc/68747470733a2f2f63646e2e616b616d61692e737465616d7374617469632e636f6d2f737465616d2f617070732f313030393936302f73735f346431313030376631356364306231623566643130653563333436343238316230323064353861642e6a70673f743d31363735373737383939
Project Hedra is an open-world, low-poly RPG with procedural generation and custom game engine features. It started as a high school project to learn OpenGL and has evolved into a full-fledged 3D game with over 100k lines of code.

Ask HN: If the models are so good, why doesn't OpenAI just start 100 companies?

Sorry

Postgres recovery_prefetch can cause outages

https://ardentperf.com/wp-content/uploads/2026/10/image-4.png?w=1024
A recovery_prefetch issue was discovered in PostgreSQL, causing production outages due to IOPS amplification on replicas. The problem is exacerbated by synchronous replication and the standby server's state machine, which can lead to significant lag and downtime.