Super HN

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421. Modern cars are spying on you. Here's what you can do about it
Modern cars are collecting more data than ever, raising privacy concerns. The Mozilla Foundation says cars are the worst product category for privacy.
422. WordPress plugin quirk resulted in UK Gov OBR Budget leak [pdf]
423. Adding Iongraph Support to ZJIT
ZJIT adds support for Iongraph, which offers a web-based, pass-by-pass viewer with a stable layout, better navigation, and quality-of-life features like labeled backedges and clickable operands.
424. Help, My Java Object Vanished (and the GC Is Not at Fault)
Today I’m going to talk about a recent journey as a HotSpot Java Virtual Machine developer working on the OpenJDK project. While running tests for a new feature, I realized my Java objects and classes were arbitrarily disappearing! What followed was probably the most interesting debugging and fixing experience of my life (so far), which I wanted to share with the world.
425. The Great Downzoning
It was once legal to build almost anything, anywhere. Then, in the space of a few decades, nearly every city in the West banned densification.
426. Don't tug on that, you never know what it might be attached to
427. A full-body MRI can reveal hidden killers. Do we want to know?
428. State Department to deny visas to fact checkers and others, citing 'censorship'
The order is focused on applicants for H-1B visas, which are frequently used by tech companies and is part of a campaign by the Trump administration against online content moderation.
429. Feds ask Waymo about robotaxis repeatedly passing school buses in Austin
The agency already opened an investigation in October over Waymo's performance around school buses. Waymo said it issued a software update to its fleet to improve performance.
430. AI-Assisted Coding Killed My Joy of Programming
AI coding assistants feel like video game cheat codes—exciting at first, then soul-crushing. A raw reflection on losing the joy of programming in 2025 and why I keep going back to my piano.
431. Netflix Kills Casting from Its Mobile App to Most Modern TVs
Netflix has quietly removed the ability to cast content from its mobile apps to most modern TVs and streaming devices, including newer Chromecast models and the Google TV Streamer. The change was first spotted by users on Reddit and confirmed in an updated Netflix support page (via Android Authority), which now states that the streaming service no longer supports casting from mobile devices to most TVs and TV-streaming devices.
432. What's the Deal with Euler's Identity?
Untangling a cursed formula from 1748.
433. FreeBSD 15.0-Release Announcement
FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms.
434. Pose-free 3D Gaussian splatting via shape-ray estimation
Abstract page for arXiv paper 2505.22978: Pose-free 3D Gaussian splatting via shape-ray estimation
435. So you wanna build a local RAG?
436. Operando interlayer expansion of curved graphene for dense supercapacitors
Supercapacitors deliver high power but are limited in compact applications by low volumetric energy and power densities. Two-dimensional materials like graphene, despite their high packing density, are hindered by poor ion transport kinetics. A rapid thermal annealing step generates unusually curved turbostratic graphene crystallites, integrated and interwoven within disordered domains in micron-size particles to yield multiscale graphene. Ion insertion into the interlayers enables precise pore-ion matching and partial charge transfer, enabling a high Brunauer-Emmett-Teller surface area-normalized capacitance of 85 µF/cm2. Here, we show that multiscale graphene exhibits rapid ion transport dynamics within the curved crystallites and disordered domains. When the thin electrodes are assembled into symmetric pouch cell devices, they deliver a stack-level volumetric energy density of 99.5 Wh/L in ionic liquid electrolytes and 49.2 Wh/L in organic electrolyte with a high power density of 69.2 kW/L at 9.6 Wh/L. Supercapacitors are high-power energy storage devices that suffer from poor volumetric performance. Here, the authors demonstrate that unusually curved graphene crystallites exhibit rapid ion transport dynamics and enable the fabrication of thin electrodes for compact energy and power delivery.
437. Why is Anthropic saying "software engineering is done"?
How to thrive in the AI-assisted era of software development
438. Show HN: RFC Hub
Track the lifecycle of Request For Comment (RFC) / Technical Design Doc (TDD) technical proposals.
439. System 7 natively boots on the Mac mini G4
System 7 natively boots on the Mac mini G4!
440. Tony Fadell, iPod co-creator, might want to be Apple's next CEO
A new report offers an overview of possibilities for when Apple’s CEO Tim Cook steps down, including Tony Fadell returning.
441. Essentials of Compilation: An Incremental Approach (2020)
442. Search for long-missing Malaysia Airlines flight MH370 to resume
The Boeing 777 with 239 people on board vanished in 2014 in one of the greatest aviation mysteries.
443. The Reverse-Centaur's Guide to Criticizing AI (05 Dec 2025)
444. TigerStyle: Coding philosophy focused on safety, performance, dev experience
Tiger Style is a coding philosophy focused on safety, performance, and developer experience.