Tesla Autopilot Crash Sparks Fresh Alarm!

I Stored a Website in a Favicon

Key Points

• The article encodes HTML into favicon pixel RGB values with a 4-byte payload-length header.
• A 208-byte HTML payload fits inside a 9×9 favicon image with 239 bytes of capacity.
• JavaScript and the Canvas API are used to read the favicon back and reconstruct the original HTML.

Can you see three trees?

Key Points

• The 3-30-300 test measures urban access to trees and parks using three simple thresholds.
• Research across 862 European cities suggests the tree-visibility and tree-cover targets are often unmet.
• Park access is the most commonly achieved standard, with nearly 60% of Europeans living within 300 meters of a park.

Where to Find the Colors Your Screen Can't Show You

Key Points

• Some visible real-world colors cannot be captured or shown by standard digital systems.
• Human color vision is based on three cone responses, enabling but also limiting three-primary display reproduction.
• The CIE chromaticity diagram shows that many cyan-region colors fall outside the gamut of common display primaries.

GPT-5.5 hallucinates 3x more than MIT-licensed GLM-5.2

Key Points

• GLM-5.2 is presented as an open MIT-licensed model that comes close to much larger proprietary models on benchmark scores.
• The article reports substantially lower hallucination rates for GLM-5.2 than for GPT-5.5 and DeepSeek V4 Pro on the AA-Omniscience benchmark.
• A Python asyncio example is used to show GLM-5.2 recognizing a flawed prompt faster and more accurately than DeepSeek V4 Pro.

World Cup 2026: Soccer Arcade Games Through the Years

Key Points

• Arcade Heroes updates its 2014 soccer arcade game history for World Cup 2026.
• The article traces soccer-themed amusement games back to pinball and foosball before video games.
• It names early examples from G/M. Laboratories, Williams, René Pierre, Satem, Taito, and Sega.

Designing a backyard deck for my house

Key Points

• The article focuses on deck design drawings for permit purposes, not the full construction process.
• The house was purchased with no back deck, requiring the rear door to be secured shut to satisfy loan and inspection conditions.
• The author ultimately chose to self-design and build the deck after contractor quotes were not workable.

A 1969 camera operators' strike created Upstairs Downstairs multiverse

Key Points

• A 1969 ITV camera operators’ strike turned advertised color broadcasts into black and white by disabling the color tubes.
• The strike caused the first season of *Upstairs/Downstairs* to be produced partly in black and white and partly in color.
• ITV created multiple color versions of the pilot for export, while the original black-and-white pilot is believed lost.

LLMs Are Complicated Now

Key Points

• Modern LLMs now include many more architectural and systems-level components than earlier transformer-based models.
• The article says performance constraints make optimized implementations necessary even during early-stage research iteration.
• It highlights composable infrastructure such as FlexAttention in PyTorch as a practical way to support experimentation.

Visiting the History of Computing and Play

Key Points

• The article covers visits to two museums focused on computing history and the history of toys and miniatures.
• The Large Scale Systems Museum features mainframes, early PCs, and notable systems such as the PERQ, Cray, NeXTcube, Apple Lisa, and BeBox.
• The Toy and Miniature Museum defines miniatures as accurate reproductions of original objects in materials, construction, and function.

Cirrus: ATProto Personal Data Server That Runs on Cloudflare Workers

Key Points

• Cirrus is a single-user AT Protocol PDS that runs on Cloudflare Workers with Durable Objects and R2.
• The project supports repository operations, federation, OAuth 2.1, migration, and passkey authentication, but is still experimental beta software.
• The article stresses that signing-key backup is mandatory because identity recovery depends on the user’s DID method and recovery setup.

CSSQuake

Key Points

• CSSQuake is presented as a browser-based Quake-style project powered by PolyCSS.
• The interface includes multiplayer, level select, help, options, HUD, and debug features.
• The page links to GitHub resources for CSSQuake and id Software’s Quake, plus Layoutit.

16-year-old SATA II SSD survives 1 petabyte of writes, 25x the drive's rating

Key Points

• A 64GB SanDisk P4 SSD reportedly survived 1 PB of writes, about 25 times its 40 TBW rating.
• The article says TBW is a warranty guideline, not a hard stop where SSDs instantly fail.
• The tested drive used 32nm MLC NAND, which the article describes as more durable than many newer NAND types.

The Cold War's Accidental Whale Observatory

Key Points

• SOSUS was built by the U.S. Navy to detect submarines but also recorded whale vocalizations across large ocean distances.
• After the Cold War, scientists used SOSUS data for marine biology and geologic research, including tracking whales and locating underwater volcanoes.
• Chris Clark describes how a 1991 dual-use initiative helped open Navy acoustic data to civilian researchers.

Lithuanian startup launches open-source network to detect Shahed-type drones

Key Points

• Drone Radar uses volunteers’ Android phones to acoustically detect Shahed-type drones.
• The system estimates possible drone locations when multiple nearby devices capture the same sound signature.
• Organizers aim for 10,000 users and future expansion across the Baltic states and Poland.

Human Judgment as a Specification

Key Points

• The article links increased GenAI use in programming with a growing need for formal specification and verification.
• It argues LLMs alone cannot resolve ambiguity or guarantee that a generated formal specification matches human intent.
• PICK uses user judgments on concrete distinguishing examples to choose among multiple LLM-generated candidates across regex, LTL, and ABAC.

Bootimus – A Self-Contained PXE and HTTP Boot Server

Key Points

• Bootimus packages PXE and HTTP boot services into a single Go binary with built-in proxyDHCP and zero-config setup.
• The boot process uses TFTP for iPXE delivery and HTTP for menus, kernels, and initrds.
• The project is presented as open source, telemetry-free, reproducibly built, and configurable with custom Secure Boot-compatible bootloaders.

From PGP to Mythos: a brief history of export controls that didn't stop anyone

Key Points

• Anthropic was ordered to restrict Fable and Mythos exports and then disabled both models.
• Reported triggers included Mythos access granted to a South Korean telecom and a reported safeguard bypass involving Fable 5.
• The article compares the AI ban with earlier export-control efforts involving PGP encryption and spyware under the Wassenaar Arrangement.

Computed goto for efficient dispatch tables

Key Points

• The article compares switch-based opcode dispatch with GCC computed goto in a simple bytecode VM.
• It uses a tiny integer-based interpreter to demonstrate VM structure without Python’s full complexity.
• Computed goto enables a dispatch table of label addresses for direct jumps between opcode handlers.

I restarted a 10 year old Xeon 174 times to delete 12 flags and gain 4 tps

Key Points

• The author ran 174 ablation benchmarks to test which flags in a 25-flag Gemma 4 inference setup actually improve performance.
• The experiments used a 2016 Xeon E5-2620 v4 server with 128 GB DDR3, no GPU, ik_llama.cpp, and gemma-4-26B-A4B-it with an MTP drafter.
• Partial benchmark results indicate that changing drafter settings could improve throughput over the published autotuned configuration.

Temporary Cloudflare Accounts for AI Agents

Key Points

• Cloudflare now allows AI agents to deploy with temporary accounts using `wrangler deploy --temporary`.
• Temporary accounts last 60 minutes and can be claimed to become permanent accounts.
• Wrangler was updated to guide unauthenticated agents toward the temporary deployment flow.

Pong in S Favicon

Key Points

• A full Pong game is rendered in the browser tab’s favicon.
• Players move the paddle by scrolling up and down.
• The score is shown in the browser tab title, and the page includes self-tests and core code sections.

New (Old) 3D Golf: Porting PC-9801 and Virtual Boy to Mega Drive

Key Points

• The author extracted and rebuilt Mega Drive golf course data in a Three.js browser viewer.
• A shared course data format appears to connect PC-9801, Mega Drive, Virtual Boy, and likely other platform versions in the series.
• The project enabled new courses to run on Mega Drive, including some never originally released for that platform.

The Doctor Who Treats Patients with a Gaming Mouse

Key Points

• Dr. James Ries says he runs telehealth workflows with a Razer gaming mouse and TextExpander at Twenty Mile Medical.
• The article describes telehealth inconsistency in documentation and communication as a workflow problem rather than a training problem.
• Ries’s branching "monster Snippets" are designed to generate complete clinical notes and follow-up content for recurring scenarios.

"Career coaches" are fear-farming the Stanford AI hiring study [debunk]

Key Points

• The article says the study examined pymetrics specifically, not AI hiring as a whole.
• Its main highlighted finding is that job-level audits can reveal disparities hidden by company-wide fairness checks.
• The article describes pymetrics as a game-based tool and says the study did not show evidence that it predicts job performance.

The European Social Stack

Key Points

• The article proposes a European Social Web built on decentralized and open technologies.
• It names Fediverse, Atmosphere, Matrix, and XMPP technologies as key components of the proposed ecosystem.
• It calls for public institutions to adopt, fund, and help grow European-owned social and messaging infrastructure.

Web Browsers on PDAS

Key Points

• The article focuses on HTML-capable PDA browsers rather than WAP or i-mode-only mobile browsers.
• PDA internet connectivity evolved from dial-up and infrared links to expansion hardware and built-in wireless features.
• EPOC and Apple Newton are used as examples of how early PDA browser ecosystems developed.

VPN ban update for UK households as government looks at 'age-gate'

Key Points

• Ministers said details on VPN-related measures tied to the under-16 social media ban will be announced in July.
• Josh MacAlister said age-gating VPN use is one option being considered.
• The government says it is not planning to ban VPNs but is reviewing restrictions through a wider online child safety consultation.

Cargo-Geiger

Key Points

• Cargo Geiger measures and reports statistics on unsafe Rust code in crates and dependencies.
• The tool is meant to support auditing workflows, not directly judge whether code is secure.
• It offers multiple installation paths and exposes three related libraries for internal and serializable functionality.

Windows 11 New Media Player Uses 3.5x More RAM, Charges for Popular Video Codecs

Key Points

• The new Windows 11 Media Player reportedly uses far more idle RAM than the classic Windows Media Player.
• The article says HEVC playback now requires Microsoft’s paid HEVC Video Extensions app.
• Windows 11 version 24H2 removes built-in AC-3 support, while VLC is cited as an alternative with bundled codecs.

Mencius

Key Points

• Robert Eno’s translation was developed from long-used college teaching materials and made available online for open access.
• The work is framed as a classroom-oriented "teaching translation," not a definitive scholarly edition.
• The translation draws on major modern translations and the traditional Chinese commentarial tradition, especially Zhao Qi and later annotated editions.

DOS Game "F-15 Strike Eagle II" reversing project needs DOS test pilots

Key Points

• The project says it has reconstructed C code for all executables of *F-15 Strike Eagle II*.
• Release v0.9.1 is available for testing with the original 451.03 game version and Desert Storm expansion pack.
• Testers are asked to report new bugs while distinguishing them from defects already present in the original game.

Big Tech is borrowing like never before

Key Points

• Nvidia’s $25 billion bond sale is framed as a sign that AI expansion is increasingly debt-financed.
• Major technology companies including Meta, Oracle, Alphabet, and Amazon have also raised large financing tied to AI infrastructure.
• The article says a more hawkish Fed stance could raise the cost of funding data centers and other AI investments.

Vacation With An Artist – Mini-Apprenticeships with Artists in Their Studios

Key Points

• VAWAA offers bookable mini-apprenticeships with artists and craftspeople worldwide.
• The platform supports both in-person experiences and live online learning sessions.
• Featured programs list specific artists, destinations, durations, and prices across multiple creative disciplines.

Sogen Kato

Key Points

• Sogen Kato’s mummified body was discovered in July 2010, despite his being listed as alive and among Tokyo’s oldest residents.
• Authorities concluded he had probably died in 1978, and his family had concealed his death while preventing officials from seeing him.
• The case exposed major weaknesses in Japan’s centenarian records and led to a broader investigation into missing elderly residents and pension fraud.

Show HN: Microcrad – Micrograd Reimplemented in C

Key Points

• microcrad reimplements micrograd in C as a scalar-based automatic differentiation engine.
• Its computation graph is built from `Value` nodes that store operands, operation metadata, and gradients.
• The project is educational in scope and includes a simple multi-layer perceptron, not a production-grade ML framework.

SMPTE Makes Its Standards Freely Accessible

Key Points

• SMPTE opened its entire standards catalog for free public access, including future releases.
• The organization tied the decision to improving interoperability and addressing industry changes such as IP workflows and AI-related authenticity concerns.
• SMPTE is also modernizing standards development with GitHub workflows, HTML-based authoring, and an integrated publishing pipeline.

Ember, a native iOS Hacker News reader I built around accessibility

Key Points

• Ember is a SwiftUI-based native iOS Hacker News reader targeting iOS 18.
• The app combines native threaded comments, search, offline bookmarks, read tracking, and profile viewing.
• Accessibility features are deeply integrated, including non-color cues, VoiceOver, Dynamic Type, and adaptive onboarding.

UHF X11: X11 Built for VisionOS and Apple Vision Pro

Key Points

• UHF X11 turns Apple Vision Pro into a full X11 display server for visionOS.
• Each X11 top-level window opens as an independent spatial window in the user’s environment.
• The app supports X authority authentication, bundled/imported fonts, and GLX-based OpenGL rendering with variable compatibility.

Show HN: StartupWiki – A Free Alternative to Crunchbase

Key Points

• StartupWiki presents itself as an AI-powered, community-driven directory for researching global ventures.
• The platform includes search, startup suggestion tools, and an API alongside standard site sections like Directory and Blog.
• Recently added listings cover companies across AI, biotech, cloud, backend, and design, while the micro-business section is currently empty.

S‑CURVES a field guide to technology adoption · 1825–2026

Key Points

• The project covers technology adoption from **1825 to 2026**.
• It frames two centuries of change through the recurring **S-curve** adoption pattern.
• It cites public and archival sources and notes a **June 2026** fact-checking pass.

Agency stole bestselling author's book, used AI to relaunch as their own

Key Points

• A lookalike site appeared to republish John Koenig’s full book while presenting itself as an official promotional page.
• The site replaced original artwork with DALL-E 2 images and added a GPT-4-powered feature for generating new entries.
• The article contrasts the new site with Koenig’s original Tumblr-based project and notes the suspicious domain change and lack of official linkage.

Bun has an open PR adding shared-memory threads to JavaScriptCore

Key Points

• The proposal adds a `Thread` API for shared-memory parallel execution in JavaScriptCore with one heap and shared objects.
• The implementation is partly working, including execution across all four JIT tiers, but it is still unfinished and may never merge.
• Examples show direct sharing for parallel map, caching, and cancellation without worker message passing or data copying.

Ask HN: Due to spam on GitHub, what platforms can I move my projects?

Key Points

• The article recommends SourceHut as an alternative to GitHub and highlights its open source, self-hostable nature.
• The post says SourceHut offers useful technical features such as CI/CD and is relatively inexpensive.
• It also emphasizes that Git repositories can be hosted independently of major platforms because local repos are complete copies.

Show HN: We post-trained a model that pen tests instead of refusing

Key Points

• `cos` provides separate Security Scan and Pen Test modes for code analysis and authorised exploitation.
• A Go harness enforces read-only behavior in Security Scan mode and limits network access in Pen Test mode.
• Cosine says the tool uses its own post-trained offensive-security model and runs locally as a closed-source binary.

The ability to regrow body parts is dormant in mammals, not lost

Key Points

• A Texas A&M study suggests mammals may retain hidden regenerative ability within normal healing machinery.
• A two-step treatment using FGF2 and BMP2 redirected healing away from scar formation toward tissue regrowth.
• The researchers reported regeneration of bone, joints, and ligaments and suggest external stem-cell addition may not be necessary.

Why has the pointe shoe been so resistant to change?

Key Points

• Pointe shoes have changed slowly because of development costs, tradition, and limited resources in ballet.
• Innovation has mostly been incremental, though some brands have introduced synthetic, hybrid, modular, and 3-D-printed designs.
• Aesthetics, fitting issues, and dancer preferences continue to limit adoption of unconventional pointe shoes.

Show HN: Tiny – An interpeted dynamic langauge with inline Go native functions

Key Points

• Tiny is a Go-written concurrent language and runtime that compiles to `.tbc` bytecode for execution on a virtual machine.
• Its runtime combines an interpreter with JIT compilation and includes threading, WebAssembly support, and built-in LSP tooling.
• The language examples showcase optional typing, structural interfaces, destructuring, and composition through class embedding.

Show HN: My Windows XP portfolio with working Game Boy and iPod

Key Points

• The portfolio recreates the Windows XP experience with boot, login, desktop, and taskbar screens.
• Its main navigation appears as desktop application icons for About Me, Resume, Projects, and Contact Me.
• The title states the portfolio includes working Game Boy and iPod-themed interactive elements.

Show HN: Make PDFs look scanned (CLI or in the browser via WASM)

Key Points

• The tool converts PDFs into image-only, scan-styled PDFs using configurable visual degradation effects.
• The CLI is deterministic by default and supports presets plus explicit flag-based overrides.
• The browser version uses WebAssembly and PDF.js instead of MuPDF, with different licensing and non-byte-identical output.

PostgresBench: A Reproducible Benchmark for Postgres Services

Key Points

• PostgresBench is a public, reproducible benchmark for managed Postgres services modeled on ClickBench methodology.
• It uses pgbench’s built-in TPC-B-like transactional workload with standardized parameters and two dataset sizes around 100 GB and 500 GB.
• The benchmark publishes throughput, average latency, and tail latency metrics, along with configuration details intended to support fair comparisons.

Now You Don't: When Espionage Meets Magic

Key Points

• Robert-Houdin said he was recruited for a political performance mission in Algiers in 1856.
• The mission’s purpose, in his account, was to counter the influence of Marabouts through staged demonstrations.
• The article highlights his technical innovation in magic and his influence on later performers including Houdini.

Google display wrong flags for world cup 2026

Key Points

• The article says Google’s World Cup 2026 widget showed incorrect flags for Norway and England in the full match list.
• It outlines possible technical causes including data-provider errors, country-code mismatches, and asset-delivery mistakes.
• The article states the issue was still visible on June 20, 2026, and suggests reporting it through Google’s feedback tool.

AMD will reinstate memory encryption on Ryzen 9000 CPUs via BIOS update in July

Key Points

• AMD plans to restore TSME/Memory Guard on certain non-PRO Ryzen 9000 desktop CPUs in July.
• The feature was removed earlier through AGESA 1.2.7.0 and was later identified during a security audit.
• TSME encrypts RAM contents to help protect against cold boot attacks, and AMD says it remains supported on Ryzen PRO processors.

UK Home Office launches £75M 'PoliceAI' to capitalise on artificial intelligence

Key Points

• PoliceAI has been launched with £75 million over three years to scale AI across policing in England and Wales.
• Initial pilots will focus on digital evidence processing, with wider rollout planned from 2027.
• The programme includes oversight measures such as a public registry of policing AI tools and independent testing for accuracy and bias.

Inference cost at scale with napkin math

Key Points

• The article proposes a paper-based method for estimating LLM inference cost from hardware and workload assumptions.
• It centers the calculation on GPU peak throughput, memory bandwidth, context length, and active parameter count.
• It uses matrix multiplication and attention as the technical basis for later estimates of token cost and user capacity.

Unauthorized alert sent to cell phones across Brazil

Key Points

• Brazil’s government said a false “extreme” mobile alert was likely caused by a hacker attack on the National Civil Defense warning platform.
• The unauthorized message reached phones in Paraná, São Paulo, and Rio de Janeiro, and some residents also reported receiving it by SMS.
• Authorities disabled the Cellbroadcast tool and said no actual emergency justified the alerts.

Linux Eliminates the Strncpy API After Six Years of Work, 360 Patches

Key Points

• Linux 7.2 has fully removed the deprecated `strncpy()` API from the Linux kernel.
• The cleanup took about six years and roughly 362 commits, including removal of architecture-specific implementations.
• The article specifies replacement APIs for different copy scenarios, including `strscpy()`, `strscpy_pad()`, `strtomem_pad()`, `memcpy_and_pad()`, and `memcpy()`.

Supermarket giant Tesco sues VMware for breach of contract

Key Points

• Tesco says Broadcom breached VMware licensing and support contracts tied to perpetual licenses bought in 2021.
• The retailer alleges Broadcom’s subscription model blocks standalone support, some upgrades, and certain security updates for perpetual-license users.
• Tesco says VMware supports about 40,000 server workloads critical to store operations and is seeking at least £100 million in damages from each defendant.

Seeing the world in radio waves with the QuadRF

Key Points

• QuadRF is a four-channel phase-coherent SDR built for accessible radio direction finding and mapping.
• Its hardware combines a four-antenna RF board, a Lattice ECP5 FPGA, and a Raspberry Pi 5 connected through high-speed MIPI links.
• Its RF camera software scans 4.9 GHz to 6.0 GHz at 30 fps and visualizes signal direction, including in a drone-tracking example.

Coding a Brick Tower [video]

Key Points

• Inigo Quilez published a YouTube video titled "Coding a brick tower."
• The visible description says the topic came from an email about creating bricks and mortar procedurally.
• The video is 44:52 long and was listed as uploaded 1 hour ago.

Dallas Fed: 30% of housing cost increase driven by unauthorized immigration [pdf]

Key Points

• The paper studies the 2021–2024 surge in unauthorized immigration using administrative microdata.
• It finds local employment rose roughly one-for-one with unauthorized immigrant worker inflows, without significant local wage declines.
• It reports higher local rents and house prices without added housing supply, alongside lower labor income per capita and reduced government transfers.

A Love Story

Key Points

• The article draws on Stanford survey data from 2017, 2020, and 2022 to track relationship quality over time.
• Most respondents rated their relationships positively, but relationship quality was linked in the article to income, gender, and relationship length.
• During the pandemic, the article reports increased breakups, more conflict, and lower relationship ratings for many couples.

Alice. Alice Is Impatient

Key Points

• Users experience latency and outages as time-weighted events, not as simple per-event averages.
• The article uses the inspection paradox to explain why customer-perceived averages can be far worse than service-reported means.
• Tail latency and long recovery times are presented as critical because they dominate customer experience.

Systemd 261 released with systemd-sysinstall, IMDSD, and storagectl

Key Points

• Systemd 261 adds a new IMDS subsystem with cloud environment recognition and local metadata access via systemd-imdsd.
• The release introduces storagectl and systemd-sysinstall as new tools for storage management and OS installation.
• Additional features include TPM fallback via swtpm, kernel LUO/KHO support, and new system management and security settings.

Pre-2022 Books

Key Points

• The author prefers pre-2022 books and is more skeptical of newer titles.
• They use LLMs for coding but still view AI-era books differently.
• The article suggests perceived human effort affects how much value the author assigns to books.

Tesla allegedly in autopilot mode crashes into Texas house, woman killed

Key Points

• A Tesla Model 3 allegedly using an automated driving assistance system crashed into a house in Katy, Texas.
• A woman inside the home, identified as M. Avila, was fatally injured after being struck by the vehicle.
• The driver was injured, showed no signs of intoxication, and the investigation remained ongoing with no charges filed as of Saturday afternoon.

Stop calling the Super Productionizer a 'baby blender' – Frank Elavsky

Key Points

• The article defends a fictional machine called the Super Productionizer and rejects the label “baby blender.”
• It uses the term “subatomic-emulsification” to reframe the machine’s described actions in pseudo-technical language.
• The narrator claims the device boosts personal productivity and prioritizes efficiency over moral objections.

Semiconductor Lifeline Keeps Fighter Jets in the Air

Key Points

• Phoenix supplied a replacement for an obsolete chip used in the U.S. Navy’s F/A-18F Super Hornet.
• The company recreates legacy components by packaging off-the-shelf chips into drop-in replacements with matching pin-outs.
• Phoenix is targeting a high-mix, low-volume semiconductor market that major foundries generally do not serve.

Turns Out, There Is a Cabal of Elite Crazies Trying to Control the World

Key Points

• A Wired report cited in the article says leaked records identify 222 registrants for Dialog’s 2026 retreat near Dublin, Ireland.
• The retreat agenda includes off-the-record sessions on AI, nuclear power, war, politics, and battlefield technology.
• The article says the attendee list spans senior military, political, and tech figures, with AI emerging as a common focus.

Not just books: renting a sewing machine from the library can improve democracy

Key Points

• Finnish libraries are expanding into community service centres offering spaces, tools and equipment beyond books.
• The article contrasts Finland’s investment in libraries with closures in the US and UK.
• Research and usage data cited in the article suggest libraries contribute to social inclusion and are widely used in Finland.

Epoll vs. Io_uring in Linux

Key Points

• TinyGate moved from a worker-based design to epoll and then to io_uring as performance requirements increased.
• The article describes epoll as readiness-based and io_uring as completion-based.
• io_uring reduces per-operation syscall overhead by using shared ring buffers and batch submission/completion handling.

Show HN: Domphy – plain-object UI for tool apps, AI-correctable output

Key Points

• Domphy is a UI framework built around plain JavaScript objects, HTML-like structure, and simple state functions.
• It introduces a Patch mechanism for reuse as an alternative to deep component nesting.
• The author has used Domphy for about a year in SketchUp and Revit plugin development for the AEC industry.

Show HN: TownSquare, a tiny presence layer for websites

Key Points

• TownSquare adds live visitor presence and lightweight interaction to websites.
• Users can move, chat briefly, jump, and high-five directly on the page.
• The article emphasizes no accounts, no algorithms, and fast free installation for site owners.

Loupe – A iOS app that raises awareness about what native apps can see

Key Points

• Loupe shows raw device data available through public iOS APIs to illustrate fingerprinting exposure.
• The app classifies signals into passive, permission-based, and advanced public-API techniques.
• Loupe is open source, keeps data on-device unless exported, and is made by Mysk.

Whole cross-sectional human ultrasound tomography

Key Points

• A custom 512-element circular receiver array and rotating transmitter enable full cross-sectional ultrasound imaging in humans.
• The system images the abdomen and thighs in reflection and transmission modes with reported uniform in-plane resolution.
• The article highlights MRI agreement, adipose assessment without ionising radiation, and video-rate biopsy needle localization as key results.

Show HN: Submarius – Global water clarity for divers

Key Points

• Submarius offers water-clarity forecasts, bite scores, and a GO/DON'T verdict for water activities.
• The app says its visibility model uses satellite turbidity, river plumes, wave mixing, and post-dive reports.
• Safety tools are free, while Pro unlocks longer forecasts, premium overlays, unlimited spots, and offline maps.

Project Fetch: Phase Two

Key Points

• Claude Opus 4.7 reportedly completed tested robodog tasks far faster than Anthropic’s human teams from August 2024.
• The Phase Two setup reduced human involvement to system setup, prompt entry, command approval, and task progression approval.
• Anthropic says the results show strong gains in integration and coding tasks, not a full solution to robotics or precision control.

15-minute at-home Lyme disease tick test

Key Points

• LymeAlert is a planned $40 at-home test that detects Lyme disease bacteria in ticks in about 15 minutes.
• Founder Erin Dawicki developed the idea at MIT Sloan after seeing patients frequently seek guidance after tick bites.
• An outside expert said the test could help if reliable, but warned it may miss other tick-borne risks and should not replace medical care.

'We had to get out of the way': The backlash over delivery robots

Key Points

• Delivery robots are spreading internationally, but some cities are restricting or banning sidewalk use.
• Residents and officials have raised concerns about pedestrian safety, accessibility, and lack of regulation.
• Companies including Starship Technologies argue the robots are safe and provide practical and environmental benefits.

When I reject AI code even if it works

Key Points

• The article says AI speeds implementation but increases the burden of reviewing generated code.
• The author rejects AI code when they cannot explain it, when it is oversized, or when it adds unnecessary complexity.
• The conclusion is that human review is still essential because working code and green CI do not guarantee good engineering.

Moving Beyond Fork() + Exec()

Key Points

• Li Chen proposed Linux kernel "spawn templates" to reduce overhead in repeated process launches.
• The article argues fork()+exec() remains inefficient because memory and process state copied by fork() may be thrown away by exec().
• The current patch set is not expected to be accepted as-is, but it may inform future process-creation APIs in Linux.

Developers don't understand CORS (2019)

Key Points

• The article says Zoom’s localhost web server communicated with the browser using an image-based workaround rather than standard AJAX.
• It argues that CORS does apply to localhost and that Zoom could have restricted access by allowing only `https://zoom.us`.
• It recommends combining a CORS-restricted localhost REST API with Content Security Policy to reduce security risk.

Guide to the TD4 4-bit DIY CPU

Key Points

• The TD4 kit is a 4-bit educational CPU with only 16 bytes of program ROM and two registers.
• The article provides assembly tips, especially for diode orientation and USB connector soldering.
• It explains how DIP-switch program data, address decoding, and command decoding implement the CPU’s instruction set.

Your brain was never designed for this much bad news

Key Points

• Reuters Institute data cited in the article shows widespread news avoidance in Canada and globally.
• The article attributes news fatigue to negativity bias and the brain’s threat-focused design.
• Research cited links negative headlines and problematic news consumption to stronger engagement and poorer well-being.

Armstrong Effect

Key Points

• The Armstrong effect is static electricity generated by the friction of a fluid, first observed in 1840 from escaping steam.
• The discovery began with Patterson’s observations at Seghill and was expanded through experiments by Pattinson, Smith, and Armstrong.
• Armstrong and Faraday helped investigate and document the phenomenon, which later informed the Armstrong hydroelectric machine.

Zigzag Decoding with AVX-512

Key Points

• The article explains zigzag encoding and why it is useful for delta-compressed signed integers.
• It presents the branchless decode formula `(v >> 1) ^ -(v & 1)` and explains the bit-level logic behind it.
• It shows a direct SIMD implementation in SSE2 and discusses instruction latency characteristics on Zen 4.

Building Reliable Agentic AI Systems

Key Points

• Bayer built PRINCE to improve access to fragmented preclinical research data using LLMs and retrieval-augmented generation.
• The article emphasizes context engineering and harness engineering as key design principles behind the system.
• PRINCE initially focused on consolidating structured study metadata into a searchable unified platform.