GPT-5.5

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OpenAI releases GPT-5.5, a more intelligent and efficient model that can handle complex tasks. GPT-5.5 excels at coding, research, and everyday work on a computer, providing better results with fewer tokens.

Bitwarden CLI compromised in ongoing Checkmarx supply chain campaign

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Bitwarden CLI 2026.4.0 was compromised through a GitHub Action in its CI/CD pipeline as part of the Checkmarx supply chain campaign. Users are advised to review CI logs and rotate exposed secrets.

MeshCore development team splits over trademark dispute and AI-generated code

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A team member, Andy Kirby, secretly used AI-generated code to take over the MeshCore ecosystem, sparking a dispute over ownership and control. The core team has now separated from Andy and will continue to develop and release MeshCore firmware and app updates on their official website, meshcore.io.

Show HN: Tolaria – open-source macOS app to manage Markdown knowledge bases

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Tolaria is a Mac app for managing markdown knowledge bases with features like offline use, open source, and keyboard-first design. It's built for power-users with a focus on flexibility and portability.

An update on recent Claude Code quality reports

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Claude's responses worsened for some users due to three separate changes affecting Claude Code, the Claude Agent SDK, and Claude Cowork. We've fixed the issues and will implement changes to prevent similar problems in the future.

My phone replaced a brass plug

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The author spent six months developing a computer vision model to automate scoring of shooting targets, using a combination of OpenCV and YOLOv8, and eventually created an offline-first app to track shooting performance.

Incident with multple GitHub services

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GitHub's Status Page - Incident with multiple GitHub services.

Show HN: Agent Vault – Open-source credential proxy and vault for agents

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Agent Vault is an open-source credential broker that eliminates credential exfiltration risk by injecting credentials at the network layer. It works with any agent, including custom Python/TypeScript agents and coding agents like Claude Code.

I am building a cloud

The author is building exe.dev, a cloud platform that addresses the limitations of current cloud services, allowing users to run VMs on their own resources and manage them easily. The goal is to create a cloud that is more flexible and user-friendly, with local NVMe storage, global regions, and a simple, intuitive interface.

Palantir employees are starting to wonder if they're the bad guys

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Palantir employees are questioning the company's involvement in immigration enforcement and its relationship with the Trump administration. The company's leadership has been criticized for its handling of internal dissent and its defense of its work with ICE and the US military.

Girl, 10, finds rare Mexican axolotl under Welsh bridge

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A 10-year-old girl named Evie found an endangered Mexican axolotl under a bridge in Wales, saving its life. The axolotl, named Dippy, was the first documented discovery in the UK and is one of only 50 to 1,000 left globally.

UK Biobank health data keeps ending up on GitHub

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UK Biobank has used copyright takedown notices to remove health data from GitHub, targeting 110 requests since July 2025. The notices mostly target Jupyter or R notebooks, genetic and genomic data files, and tabular datasets containing participant health records.

U.S. Soldier Charged with Using Classified Info to Profit from Prediction Market

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US Army Soldier Gannon Ken Van Dyke charged with using classified information for personal gain, making over $400,000 in illegal trades on Polymarket. He faces up to 40 years in prison for violating federal laws and misusing national security information.

TorchTPU: Running PyTorch Natively on TPUs at Google Scale

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Google's Tensor Processing Units (TPUs) require a software stack that meets demands for performance, hardware portability, and reliability, leading to the development of TorchTPU, a PyTorch integration for native and efficient TPU usage. TorchTPU achieves this through its "Eager First" philosophy, Fused Eager mode, and native support for custom kernels, ensuring a seamless and ...

Your hex editor should color-code bytes

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The user discusses the benefits of using color in hex dumps to make it easier to notice patterns and details in the data. They propose a custom hex editor called hexapoda and suggest that more tools should include color-coded bytes.

Astronomers find the edge of the Milky Way

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A team of astronomers found that the Milky Way's star-forming disk ends at 35,000-40,000 light-years from its center. Stars beyond this point are older and likely migrated outward due to the galaxy's spiral waves.

A programmable watch you can actually wear

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The LILYGO T-Watch Ultra is a DIY smartwatch with ESP32-S3, IP65-rated case, and various features like AI acceleration, Wi-Fi, Bluetooth, and LoRa. It's suitable for complex applications and has a long runtime due to its 1,100mAh battery and improved display.

Show HN: Honker – Postgres NOTIFY/LISTEN Semantics for SQLite

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Honker is a SQLite extension and language bindings that add durable pub/sub, task queue, and event streams to SQLite without client polling or a daemon/broker, allowing atomic business writes and side-effect enqueues. It achieves single-digit millisecond reaction time and supports various languages including Python, Node, Rust, Go, Ruby, Bun, and Elixir.

French government agency confirms breach as hacker offers to sell data

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France's ANTS agency disclosed a data breach after a threat actor claimed stealing citizen data, potentially exposing 19 million records. The agency advises users to be vigilant about suspicious messages and has notified authorities, but no action is required.

Using the internet like it's 1999

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The author believes the internet has become a controlled echochamber where people are fed algorithmically generated content, and suggests using older technologies like RSS feeds, IRC, and email to reclaim agency over attention and information.

Advanced Packaging Limits Come into Focus

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Packaging is now a performance variable, with warpage and mechanical issues complicating continued scaling. Advanced packages are no longer simple structures, but mechanically asymmetrical systems with different layers expanding, softening, and storing stress differently.

I spent years trying to make CSS states predictable

The author describes a problem with CSS where component state is managed through overlap, leading to complexity and potential bugs. They created a system called Tasty that allows component state to be expressed declaratively, making it easier to extend or change components without reopening the state-resolution problem.

Writing a C Compiler, in Zig (2025)

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This is a series of articles I wrote while writing paella, following Nora Sandler's Writing a C Compiler. It was both an exercise to learn Zig and a way to waste time instead of looking for work, as I am currently "between jobs". I did not edit them as I collect them here outside of fixing some broken links.

WireGuard for Windows Reaches v1.0

Jason Donenfeld announced the v1.0 release of WireGuardNT and WireGuard for Windows with bug fixes and improvements including NdisWdfGetAdapterContextFromAdapterHandle() and proper MTU change notifications. The release also includes 42 bug and correctness fixes for WireGuardNT and a new feature for setting system DNS server programmatically on older Windows 10 versions.

Arch Linux Now Has a Bit-for-Bit Reproducible Docker Image

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Arch Linux now has a reproducible Docker image under the "repro" tag, but pacman is not usable out of the box due to stripped pacman keys. Users must regenerate the pacman keyring before installing packages.

Alberta startup sells no-tech tractors for half price

Ursa Ag, a small Canadian manufacturer, is selling tractors with remanufactured 1990s diesel engines and no electronics for half the price of comparable machines. The company's simple, mechanical design is appealing to farmers who want to avoid modern complexity and high costs.

If America's so rich, how'd it get so sad?

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The US has experienced a sharp decline in self-reported happiness since 2020, with no recovery, despite a strong economy and low unemployment. The culprit is likely the ongoing COVID pandemic and its aftermath, including inflation, economic uncertainty, and a uniquely negative news environment.

Jiga (YC W21) Is Hiring

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Jiga streamlines product sourcing by connecting engineers with vetted manufacturers and automating administrative tasks. This saves time and reduces costs, allowing engineers to focus on actual work.

A Renaissance gambling dispute spawned probability theory

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Mathematicians Blaise Pascal and Pierre de Fermat solved the "problem of points" by considering future possibilities of the score. Their solution, based on expected value, is used in risk assessments and has become a fundamental pillar of modern probability theory.

Isopods of the world

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Isopod Site aims to improve isopod identification through basic anatomy understanding. Selective breeding is used in the hobby to boost unique traits in new lineages.