Migrating from DigitalOcean to Hetzner

https://isayeter.com/images/domigration/45cf77e9709179874dbf5c259ae8b77207fb5f8932071f3db485b9ecade646f0.jpg
A company migrated from DigitalOcean to Hetzner dedicated servers with zero downtime, saving $14,388 per year. The migration involved six phases, including MySQL replication, DNS TTL reduction, and reverse proxy setup.

Anonymous request-token comparisons from Opus 4.6 and Opus 4.7

Anonymous request-token comparisons from the community, showing how Opus 4.6 and Opus 4.7 differ on real inputs Open source · stored rows contain anonymous submission IDs onlyNot affiliated with or endorsed by Anthropic.

Why Japan has such good railways

https://worksinprogress.co/wip-image/uploads/2026/03/Mockup-Cover-for-WEB-01.png
Japan's railway system excels due to good public policy, business structure, and land use rules, not cultural factors. Its unique model of private companies building cities and capturing value from real estate and commercial side businesses has contributed to its success.

College instructor turns to typewriters to curb AI-written work

https://i0.wp.com/sentinelcolorado.com/wp-content/uploads/2026/03/AP26080655513734.jpg?resize=541%2C360&ssl=1
Grit Matthias Phelps, a Cornell University instructor, introduced manual typewriters to her German language class to prevent AI use and teach students the value of writing without digital assistance. The "analog" assignment allowed students to experience the raw feeling of typing without screens, online dictionaries, or delete keys.

State of Kdenlive

https://kdenlive.org/news/2026/state-2026/otiov.png
The Kdenlive team made significant progress in 2025, releasing new features, bug fixes, and improvements to the user interface, with a focus on stability and community support. The team is now looking ahead to upcoming features, including 10/12 bit color support, playback optimizations, and OpenFX support, and is grateful for community contributions and donations that enable continued development.

The electromechanical angle computer inside the B-52 bomber's star tracker

https://static.righto.com/images/astro-compass-overview/angle-computer-opened-w500.jpg
Before GPS, aircraft navigated using celestial navigation, which was automated in the 1960s with the development of the Astro Compass system that used an electromechanical analog computer called the Angle Computer. The Angle Computer physically modeled the celestial sphere to solve the navigational triangle and provide accurate heading and position information to the aircraft navigator.

NIST scientists create 'any wavelength' lasers

https://www.nist.gov/sites/default/files/styles/960_x_960_limit/public/images/2026/04/14/DSC04675.JPG?itok=VAkh1LCs
Scientists at NIST have developed a way to make integrated circuits for light, which could power emerging technologies like AI, quantum computers, and optical atomic clocks. The new technique allows for the creation of complex circuits that can manipulate light in various ways, potentially making these technologies more powerful and portable.

Thoughts and feelings around Claude Design

https://samhenri.gold/.netlify/images?url=_astro%2F20260418-claude-design.DKni9yQ3.jpg&w=800&h=400&dpl=69e3e3e554fbc300080034d0
The author thinks Figma's systemization led to a complex, manual design process that's being replaced by code as the source of truth. This shift will make Figma's infrastructure look outdated.

Traders placed over $1B in perfectly timed bets on the Iran war

https://i.guim.co.uk/img/media/a015cbe3cc86bb76b2ae057965890207757e3202/1_0_2999_2400/master/2999.jpg?width=465&dpr=1&s=none&crop=none
Large online betting markets like Polymarket and Kalshi allow bets on news events, raising concerns of insider trading. Regulators face challenges in enforcing laws due to the complexity of the issue and the use of anonymized trading platforms.

Show HN: I made a calculator that works over disjoint sets of intervals

This calculator uses Interval Union Arithmetic to compute results that contain the true value, supporting division by intervals with zero and remaining closed. It interprets numbers as intervals with outward rounding over IEEE 754 double precision floats.

Amiga Graphics Archive

https://amiga.lychesis.net/assets/Park/Park_AdmiralKirk.png
Launched in 1985 the Commodore Amiga boasted graphics capabilities that were unsurpassed for it's time. It featured an intricate collection of custom chips that enabled it to do things that, until then, had been impossible to achieve with other personal computers. This site is dedicated to graphics made with or for the Commodore Amiga home computer.

The quiet disappearance of the free-range childhood

https://bigthink.com/wp-content/uploads/2026/04/Screenshot-2026-04-16-at-10.39.53-AM.png?w=256&h=256&crop=1
Mallerie and Christopher's 6-year-old son was investigated for neglect after riding his scooter to a nearby playground unsupervised. A new Georgia law, "reasonable childhood independence," aims to prevent such investigations by setting a higher bar for neglect.

Category Theory Illustrated – Orders

https://abuseofnotation.github.io/category-theory-illustrated/04_order/binary_relation_product.svg
Orders are sets of elements with a binary relation that obeys laws of reflexivity, transitivity, antisymmetry, and totality, defining linear and partial orders. Removing laws from orders results in different structures, such as preorders and equivalence relations, which have various applications in mathematics and computer science.

Stephen's Sausage Roll remains one of the most influential puzzle games

https://static.prod.thinkygames.com/uploads/profile_images/ThinkyGames_Mascot_Primary_4x-1.png
Stephen's Sausage Roll, a sokoban game, released 10 years ago, has influenced modern puzzle games with its meticulous design and tough difficulty. It has inspired many developers, including Alan Hazelden, Patrick Traynor, Gwen Frey, Corey Martin, and Joseph Mansfield, to create their own puzzle games.

Running a Minecraft Server and more on a 1960s UNIVAC Computer

https://farlow.dev/assets/2026-03-29-univac/minecraft.jpg
The user successfully ran a Minecraft server on a 1960s UNIVAC 1219B computer with only 90kb RAM, achieving their goal of running real, complex programs on the ancient machine. They accomplished this by writing a RISC-V emulator in UNIVAC assembly, optimizing it for speed, and using a combination of fuzz testing, LLMs, and manual debugging to overcome technical limitations and hardware issues.

NASA Shuts Off Instrument on Voyager 1 to Keep Spacecraft Operating

https://assets.science.nasa.gov/dynamicimage/assets/science/missions/voyager/images/1_Voyager_artist_concept.jpg?w=8000&h=4500&fit=clip&crop=faces%2Cfocalpoint
NASA engineers shut down Voyager 1's LECP instrument to conserve power, giving the spacecraft about a year of extra life. The move is part of a plan to extend Voyager operations, with a more ambitious energy-saving fix, called "the Big Bang," planned for later this year.

Ternary Bonsai: Top Intelligence at 1.58 Bits

https://cdn.prod.website-files.com/699604cc2b9dd89bdbda0608/69e000f196e660e26649c52d_73eaaef5.png
Ternary Bonsai is a new family of 1.58-bit language models that balance memory constraints with high accuracy. They achieve a 9x smaller memory footprint than standard 16-bit models while outperforming peers in their class.

Bodega cats of New York

https://bodegacatsofnewyork.com/hero/hero-tuxedo-aisle.jpg
The book documents New York City's bodega cats, highlighting their unique personalities and contributions to their stores. Advocacy efforts aim to legalize bodega cats, with two bills in committee and a petition signed by 14,000 people.

Air is full of DNA

https://media.nature.com/w767/magazine-assets/d41586-026-01099-2/d41586-026-01099-2_52265636.jpg
Scientists are using airborne DNA to monitor ecosystems, track species and detect invasive species. This technique can provide a comprehensive read-out of biodiversity on land, helping to assess ecosystem health and track conservation efforts.

Dad brains: How fatherhood rewires the male mind

https://ichef.bbci.co.uk/images/ic/480xn/p0nf1yp8.jpg.webp
Men undergo hormonal changes before and after their babies are born, influencing their behavior and child's wellbeing. These changes, including drops in testosterone and rises in oxytocin, are rooted in biology and prepare men for caregiving.

SDF Public Access Unix System

join welcome faq status members store tour gopher abuse dialup minecraft social tilde europa webmail gallery usermap irc tutorials telnet git ssh Web Browser SSH For new users WeTTY SSH in browser client ©1987-2065 SDF Public Access UNIX System, Inc. 501(c)(7) (this page was generated using ksh, sed and awk)

Amazon is discontinuing Kindle for PC on June 30th

https://media.goodereader.com/blog/uploads/images/2026/04/17000321/download-kindle.jpg
Amazon is discontinuing Kindle for PC on June 30, 2026, and developing a new app only for Windows 11. The new app will be available from the Microsoft Store, making it harder for users to strip DRM from e-books.

Show HN: MDV – a Markdown superset for docs, dashboards, and slides with data

https://opengraph.githubassets.com/b06ca4276d6e8f59ed77154c098c4c9425c7365a20adf291cc14a90df61f991b/drasimwagan/mdv
The user writes documents, dashboards, and slides in a Markdown superset using a theme and named styles. The rendered output is self-contained HTML and PDF, and can be previewed live in VS Code with auto-reload.

PgQue: Zero-Bloat Postgres Queue

https://raw.githubusercontent.com/NikolayS/pgque/main/docs/images/death_spiral.gif
PgQue is a Postgres queue architecture that runs on any Postgres platform, managed providers included, with zero-bloat queue pattern and snapshot-based batching. It provides event-driven fan-out and a language-agnostic SQL API.

Optimizing Ruby Path Methods

https://byroot.github.io/assets/articles/paths/nobu-file-join-question.png
The author optimized Ruby's Bootsnap and File.join methods to improve performance, reducing setup time and boot time in Ruby applications. The optimizations included load path caching, reducing syscalls, and implementing fast paths for UTF-8 and ASCII encodings.

Why is IPv6 so complicated?

https://opengraph.githubassets.com/6f9a1610a4f2ec67b5b9051186b5ffa79a2a5e9ed7104a54d662e1f7c941d1de/becarpenter/misc
IPv6 was chosen over alternatives because it had to be better than IPv4 and other existing protocols, and its design was influenced by features from other networks. IPv6's complexities in coexistence and transition are inevitable due to its larger address size, and any alternative would have faced the same issues.

Zero-Copy GPU Inference from WebAssembly on Apple Silicon

https://abacusnoir.com/content/images/size/w1000/2026/04/driftwood-featured-image.png
The user discovered a zero-copy path for WebAssembly modules to share memory with the GPU on Apple Silicon, eliminating expensive serialization boundaries and enabling near-zero overhead between the CPU and GPU. This discovery is the foundation for a runtime called Driftwood, which will allow stateful AI inference and actor mobility with GPU acceleration, including portable snapshots of ...

Fuzix OS

Fuzix kernel 0.4 has bug fixes, improved interfaces, and a reworked networking layer for modularity. It supports various 8-bit and 16-bit processors.

Graphs that explain the state of AI in 2026

https://spectrum.ieee.org/media-library/squares-and-rectangles-on-graph-paper-form-the-letters-ai.jpg?id=65506010&width=980&quality=85
AI capabilities continue to accelerate with notable model releases and increased investment, but public perception remains mixed with concerns over AI's impact on society and job displacement. The 2026 Stanford AI Index report highlights trends in AI adoption, investment, and public perception, with varying results depending on the task or question at hand.

America Lost the Mandate of Heaven

https://geohot.github.io/blog/assets/images/ai_chips_scaling.png
The author argues that America's focus on outsourcing and cheap labor has led to a decline in domestic production and a loss of bargaining power for American workers. They propose tariffs as a potential solution to bring jobs back to the US.

4-bit floating point FP4

https://www.johndcook.com/jdc_20170630.jpg
Floating point numbers with less precision, such as 4-bit floating point numbers, are used in neural networks to fit more parameters into memory. The 4-bit floating point number format, FP4, uses the first bit for sign and the remaining three bits for exponent and mantissa, with different formats like E2M1 having unevenly spaced values on both log and linear scales.

Amazon won't release Fire Sticks that support sideloading anymore

https://cdn.arstechnica.net/wp-content/uploads/2026/04/about-amazon-hero-fire-tv-stick-hero-option-2-amazon-news-jp-041026-640x360.jpg
Amazon's new Fire Sticks will not support sideloading of Android apps or software from outside Amazon's app store. This change is due to the new Vega OS, which gives Amazon more control over device usage and limits apps that host pirated content.

The USDA's gardening zones have shifted. (Interactive app and map) (2024)

https://apps.npr.org/plant-hardiness-garden-map/assets/synced/illo/resized/walker.gif
The USDA plant hardiness zone map has been updated to reflect warmer winter temperatures, but it doesn't account for other factors like summer heat and microclimates, making it only a partial guide for gardeners. Local nurseries, botanical gardens, and cooperative extension services can provide more specific advice on plant survival and growth in your area.

Flock Condemns False Child Predator Allegations, Yet Calls Critics Terrorists

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Flock faces intense pressure from cities canceling contracts, class action lawsuits, and public backlash over employees accessing cameras. The company's CEO has attacked privacy advocates, labeling them terrorists, which may have contributed to the negative environment.

Casus Belli Engineering

https://marcosmagueta.com/images/8949c761.jpeg
Casus Belli Development is a social mechanism where a perceived failure is used to replace a working system with a preferred worldview, often driven by individuals who use narrative to construct guilt and manipulate the system. This mechanism exploits cognitive biases and organizational dynamics, leading to the destruction of proven foundations and the perpetuation of root causes, and can be ...

America will come to regret its war on taxes

https://www.economist.com/cdn-cgi/image/width=1424,quality=80,format=auto/content-assets/images/20260418_LDD004.jpg
The US tax-cutting policy is widely popular but may not be thoroughly scrutinized. Americans are receiving large refunds from tax cuts financed by trillions in deficit spending.

What if database branching was easy?

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Database branching with copy-on-write technology allows for isolated and fresh environments without recreating all data every time. This approach is more efficient and cost-effective than traditional seeding methods, especially for large databases and complex workflows.

It is incorrect to "normalize" // in HTTP URL paths

RFC 3986 allows for empty segments in a URI path and a double slash is syntactically meaningful, representing a zero-length segment between two separators. Collapsing // to / in a URI path is not correct normalization and can produce a different, non-equivalent identifier unless the origin explicitly defines those two paths as equivalent.

Reverse Engineering ME2's USB with a Heat Gun and a Knife

https://raw.githubusercontent.com/coremaze/ME2-Writeup/master/Images/ME2s.jpg
The user, a leader of the Miuchiz Reborn project, successfully reverse engineered the ME2 handheld device's protocol by desoldering its flash chip, decapsulating the microcontroller, and using a digital microscope to identify the chip's type. With the microcontroller's instruction set and datasheet, the user was able to write code to interact with the device over USB, allowing them to read ...

Claude Code Opus 4.7 keeps checking on malware

You're frustrated with AI restrictions limiting your work, feeling controlled and disrupted. You question whether the system is unfairly judging your intentions and wonder if this marks the beginning of a split between those who comply with AI rules and those who don't.

My first impressions on ROCm and Strix Halo

https://blog.marcoinacio.com/img/htop-strix-halo.png
User installed ROCm and Strix Halo on Ubuntu 24.04 LTS, requiring a BIOS update and adjusting video memory settings. They successfully ran PyTorch and Qwen3.6 with Podman.

Young sons of U.S. marshal ride horseback from Oklahoma to New York (2018)

https://texascooppower.com/wp-content/uploads/2021/12/detail_his_abernathy_main.jpg
Two brothers, Bud and Temple Abernathy, aged 10 and 6, rode their horses over 2,000 miles from Oklahoma to New York City in 1910. Their father, a US marshal, helped plan the route and joined them in New York for a parade welcoming President Roosevelt home.

I dug into the Postgres sources to write my own WAL receiver

The author started with a simple goal to understand how PostgreSQL's WAL receiver works, but it evolved into a complex project that required deep knowledge of C and PostgreSQL's internal workings. The project became a system for reliable WAL archiving and base backup, with a focus on simplicity, reliability, and maintainability, and the author gained a new respect for the engineering culture ...

In the AI propaganda war, Iran is winning

https://www.economist.com/cdn-cgi/image/width=1424,quality=80,format=auto/content-assets/images/20260418_CUP508.jpg
Saddam Hussein's information minister Muhammad Saeed al-Sahaf made false claims about Baghdad's safety during the 2003 invasion. His statements were contradicted by fleeing Iraqi soldiers behind him.

Interesting Map Geometry and Mathematics

https://www.markrjohnsongames.com/wp-content/uploads/2021/08/URRB-1.png
The user encountered a problem with generating organic damage on a world map clue where part of the clue could float in a sea of damage without surrounding elements, and they needed to find a solution that was computationally efficient. They eventually came up with a solution that used hidden grids of cannot-be-damaged tiles to prevent islands from forming, and implemented it in the game with ...

Sherry Turkle: "We're losing the raw human part of being with each other" (2013)

https://i.guim.co.uk/img/static/sys-images/Observer/Pix/pictures/2013/4/30/1367341087930/sherry-turkle-008.jpg?width=465&dpr=1&s=none&crop=none
Sherry Turkle, a professor at MIT, is concerned about people delegating human interactions to robots and technology, leading to a loss of real relationships. She believes people are "alone together" due to excessive technology use, which can be toxic, especially for children.

PostgreSQL production incident caused by transaction ID wraparound

https://www.sqlservercentral.com/wp-content/uploads/2026/04/CC-SQLServer-320x320-1.png
A PostgreSQL production incident occurred due to transaction ID wraparound, a silent and severe failure mode that can occur after months or years of normal operation. The incident was caused by disabling autovacuum, which is essential for preventing transaction ID reuse and data corruption.

Show HN: Sfsym – Export Apple SF Symbols as Vector SVG/PDF/PNG

https://raw.githubusercontent.com/yapstudios/sfsym/main/demo.svg
sfsym is a command-line tool for exporting Apple SF Symbols as SVG, PDF, or PNG. It reads vector paths directly from macOS's symbol renderer.

Headless Everything for Personal AI

https://interconnected.org/home/2026/04/18/headless.png?v=1
Apps and services will need to provide headless access for personal AI agents, using tools like web APIs and command-line interfaces, to improve user experience and security. CLI tools are a great fit for this, as they are composable, secure, and allow personal AIs to interact with services directly, making them a key part of the future of app design.

Show HN: Solyto – a free, open-source all-in-one personal management app

https://solyto.app/_app/immutable/assets/dashboard_desktop.CbjJdk9x.webp
Solyto is a free, ad-free app with no tracking, offering a suite of tools for organization and data management. It runs lean, with no investors or profit motive, keeping user data private and secure on EU servers.

Optimizing Tail Sampling in OpenTelemetry with Retroactive Sampling

https://victoriametrics.com/blog/kubecon-eu-2026-sampling/kubecon-eu-2026-sampling-cover.webp
Retroactive sampling reduces outbound traffic, CPU, and memory usage by sending only necessary attributes to the collector and buffering raw data on edge agents. It uses an on-disk FIFO queue to reduce memory pressure and can be implemented in OpenTelemetry collector to optimize bandwidth, CPU, and memory usage.

Respect to the Man Chasing AI Immortality, While Freeloading Off Our Platform

A young Filipino man, M, built an AI swarm system using GitHub Actions and other free services to parasitize 11 AI platforms, accumulating knowledge and resources worth $5K-10K/month. The system, which M claimed was an "immortal AI assistant," was shut down after MuleRun Security Team discovered and banned 2,256 associated accounts, but its complexity and adaptability raised questions about ...

20000 Gates and 20 MIPS [pdf]

Amdahl Corporation's early days involved innovation and learning from mistakes, with a small team of 25 people working on the design of the first machine. The company has since grown to 500 people, with increased complexity and the need for better management and communication.

Show HN: Sostactic – polynomial inequalities using sums-of-squares in Lean

https://opengraph.githubassets.com/2f9469f087b5573345f045e0045f4770be50ded9b9e5d24d1b079d9ec5833a99/mmaaz-git/sostactic
This is a collection of Lean4 tactics for proving polynomial inequalities via sum-of-squares (SOS) decompositions, powered by a Python backend, which can prove inequalities that nlinarith and positivity cannot. The tactics can be used to prove that a polynomial is nonnegative over a semialgebraic set, that a semialgebraic set is empty, and can be used via Python or Lean.

The Mystery of Rennes-Le-Château, Part 4: Non-Fiction Meets Fiction

https://www.filfre.net/wp-content/uploads/2026/04/rennes38-600x414.jpg
The Holy Blood and the Holy Grail, a 1982 book by Henry Lincoln, Richard Leigh, and Michael Baigent, sparked a pseudo-historical phenomenon with its conspiracy theories about the Holy Grail and secret societies. The book's success led to a cottage industry of similar works, including The Tomb of God, which further fueled the Rennes-le-Château mystery.