Regressive JPEGs

https://maurycyz.com/projects/bad_jpeg/cats.jpg
The post explains how JPEG progressive scans can be used to progressively display low‑frequency data, and how the author exploits this by concatenating multiple scans (mostly DC‑only) to create a pseudo‑animation that works in browsers up to about 90 frames. Although this trick bypasses the usual 9‑scan limit and avoids ghosting, it has no real practical use because timing must rely on ...

AWS: Inaccurate Estimated Billing Data – $1.7 billion

AWS users reported massive unexpected billing estimates (up to $595B) due to a billing console bug, causing panic and infrastructure shutdowns. The incident highlights urgent need for AWS to improve error communication and billing accuracy.

Funny item co-occurrences in 3.2M Instacart orders

https://rogerdickey.com/content/images/2026/07/screenshot---instacart-data.jpg
The author analyzed Instacart's open-sourced data to find unusual grocery combinations. They used a product classification system to reduce complexity and ranked combinations by "lift" and humor score.

Thanks HN for 15 years of support and helping me find my life's work

Celebrating 15 years, Recurse Center began as a YC 2010 startup, pivoting from failed ventures to a self-directed programming retreat, driven by Hacker News (HN) for growth. Though not a billion-dollar venture, it's impacted over 3,000 programmers, with HN as a key applicant source and catalyst for the founder's work—thanking HN!

Porting nanochat to a TPU: what carries over from PyTorch, and what breaks

https://private-user-images.githubusercontent.com/37643248/621952962-4072e6ad-7949-401f-9ab7-ddbc03920033.svg?jwt=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.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.0EcO6no0hGoJj2p3NJ3s3HbVed59cGkPBd8G5-ylwqY
Karpathy's nanochat normally runs on an 8×H100 GPU node, and several ports of it to JAX already exist. Among them, my aim was to keep the config and architecture as close to nanochat as possibl...

Reviving a 15-year-old netbook with Arch Linux

https://parksb.github.io/images/b02b09c6-db90-4570-a7f0-aafa29bc3ae9.webp
I revived an ASUS Eee PC 1000HE, noting its weak Atom N280 CPU and 1 GB DDR2 RAM, and installed Arch Linux 32 to run a lightweight LXQt desktop, detailing partitioning, networking, and swap setup. After upgrading RAM to 2 GB, I still faced performance limits due to the aging HDD and CPU, but the machine now serves as a modest server or media device.

First atmosphere found on Earth-like planet in habitable zone of distant star

https://ichef.bbci.co.uk/news/480/cpsprodpb/389a/live/ad9822a0-81d2-11f1-926f-c90d1bcfbc84.jpg.webp
Researchers discovered the first atmosphere on an Earth-like rocky planet, LHS 1140b, in a star's habitable zone, detecting helium but noting other gases might exist, marking progress in the search for extraterrestrial life. While not confirming life, this finding, alongside studies of planets like K2-18b and TRAPPIST-1, highlights ongoing efforts to identify habitable worlds beyond our solar system.

In-toto: A framework to secure the integrity of software supply chains

https://in-toto.io/featured-background.jpg
in-toto is designed to ensure the integrity of a software product from initiation to end-user installation. It does so by making it transparent to the user what steps were performed, by whom and in what order. An open metadata standard that you can implement in your software’s supply chain.
https://opengraph.githubassets.com/63ec4fff05ee92a1d4733de2887deade89b947002f3285034e38f78eb2005c54/BadChemical/IoT-Vulnerability-Research-Public
TP-Link Kasa Spot EC71 indoor cameras have multiple vulnerabilities, including fleet-wide RSA key exposure, unsalted MD5 credential storage, and unauthenticated GPS exposure.

The Zilog Z80 has turned 50

https://goliath32.com/img/prev/blog/z80/0.jpg
The Zilog Z80, launched 50 years ago in 1976, became a foundational 8-bit processor for early computers and embedded systems, influencing CP/M and spawning clones like the GameBoy’s LR35902, while its industrial use persisted until 2024. The author’s DIY Z80 projects and exploration of its evolution from the 8080 highlight its technical legacy, from simplified interfacing to advanced features ...

Learning a few things about running SQLite

Using SQLite with Django revealed performance issues resolved by `ANALYZE`, but concurrency challenges during deletions caused crashes, prompting consideration of Postgres for scalability. Despite backup efforts and small-scale success, SQLite's limitations highlight the need for better database management as projects grow.

Waldi: A quiet place to write, and to be read

https://raw.githubusercontent.com/waaldev/waldi/main/docs/screenshot.jpg
Live at waldi.blog — reading is open to everyone; writing is by invitation while the founding writers shape the place. Waldi is a multi-tenant blogging platform for people who miss blogs — one Go binary and Postgres, server-rendered html/template pages, and a single Tiptap editor island. Every writer gets username.<base-domain> (or a domain of their own); the same binary serves every ...

Show HN: IKEA Complexity Index

single-pdf products only

Kimi K3, and what we can still learn from the pelican benchmark

https://static.simonwillison.net/static/2026/kimi-3-pelican.jpg
Moonshot AI's Kimi K3, a 2.8T-parameter model, claims top performance in benchmarks, open weights by July 2026, and high pricing ($3/$15 per million tokens), outperforming peers in code tasks but costing 25 cents for a complex SVG generation test.

Stenchill: 3D Printable Solder Paste Stencil Generator

https://i.ytimg.com/vi/M8u--M0dwfc/maxresdefault.jpg
Barbatronic is a French robotics creator who shares hardware tutorials on YouTube and Twitch, and has a community of makers and hackers. He integrates Stenchill, a stencil for precise solder paste deposits, into his fabrication workflow.

I started a “dirt notebook”

https://pinewind.bearblog.dev/static/og-image.png
User has a habit of over-organizing notebooks, making it hard to take new notes. To break this cycle, they started a "dirt notebook" with poor paper quality and cheap pens to write down random thoughts without structure.

Static search trees: 40x faster than binary search (2024)

https://curiouscoding.nl/ox-hugo/partial.svg
The post discusses implementing a static search tree (S+ tree) for high-throughput searching of sorted data, optimizing it to its limits, and adding batching to improve throughput. The S+ tree is a data structure that supports queries returning the smallest element of vals that is at least q, or u32::MAX if no such element exists, and is optimized for throughput, with the goal of making ...

Qubes OS Security in the Public Record

https://arxiv.org/static/browse/0.3.4/images/arxiv-logo-fb.png
Qubes OS is a revealing case for security measurement because its architecture makes component boundaries security-relevant. We present a protocol-driven longitudinal analysis of 109 public Qubes Security Bulletins (QSBs, 2011--2025), the official Qubes-maintained Xen Security Advisory (XSA) tracker, and a secondary vulnerability-event sensitivity series. The study measures the public ...

Battery packs: Let's talk about crates, baby

https://smallcultfollowing.com/babysteps//assets/2026-07-15-battery-packs.png
Battery packs are curated sets of crates that help new Rust adopters find high-quality dependencies without spending time researching alternatives. Anyone can create a battery pack, which can be published as a crate and used to recommend libraries and templates for specific use cases.

Vāgdhenu: A Sanskrit Chanting TTS System

The app provides free access to the complete Śrīmad Bhāgavatam with synced audio and karaoke highlighting in 10 Indian scripts. It also includes a Sanskrit chant tutor that scores and corrects user recitations using a trained model.

An Update on Igalia's Layer Based SVG Engine in WebKit (Reducing Layer Overhead)

The Layer Based SVG Engine (LBSE) has made significant progress in recent years, with its integration into WebKit and the addition of various features such as clipping, masking, and filters. However, the engine still requires further development to meet its performance goals, and a recent change to conditional layer creation has introduced a new compositing problem that needs to be addressed.

The Computer at the Bottom of a Canal

https://negroniventurestudios.com/wp-content/uploads/2026/07/01-hero-canal-labelled-master-1024x574.png
Somewhere at the bottom of the Forth and Clyde Canal, buried in the silt, there is a box of custom silicon that was right about almost everything. Back in 1988 a Scottish hi-fi company shipped a processor that checked the type and bounds of every memory access in hardware, garbage-collected its own heap in silicon, and treated memory and disk as a single persistent object store. Retellings of ...

Lego building instructions through time

A security service blocked your action due to potential threats like specific phrases, SQL commands, or malformed data. Contact the site owner with your activity details and the Cloudflare Ray ID for resolution.

DrDroid (YC W23) Is Hiring

https://bookface-images.s3.amazonaws.com/small_logos/7b6d81dd6d4c4bdc913b702f0bd007e3c36cfe55.png
DrDroid in Bengaluru builds AI agents to automate triage, debugging, and remediation for platform teams. Backed by Accel and Y-Combinator W23, they seek devs passionate about tools that improve engineering workflows.

Painting the sides of railroad rails white to reduce derailment

https://www.up.com/content/dam/upcom/marketing---sales/images/ShippingWithUs_UP%20Locomotive-min.jpg/_jcr_content/renditions/mobile-jpg.jpeg
Union Pacific is painting rails white to reflect sunlight, cutting rail temperatures by about 20°F and reducing heat‑related derailments. The move, first in the U.S. and proven in Europe, is part of a safety strategy that lowered derailment rates 19% in 2025.

Open Book Touch: open-source e-reader

https://www.crowdsupply.com/img/7a19/ea41febb-029e-492e-bb3b-5953813c7a19_aa-md.jpg
The Open Book Touch is a small, open-source e-reader with a 4.26-inch e-paper touchscreen, Wi-Fi, and a frontlight for reading in any environment. It's designed for reading, not browsing, with a focus on typography, localization, and customization, and is available for crowdfunding with a goal of shipping in early 2027.

Show HN: Find someone in the dark – light them or light yourself? (Three.js)

https://opengraph.githubassets.com/9f7825733432f8e621589954ea15e4e4e39169d1c9579b7f5f5b7ed2a556da51/skorotkiewicz/signal-in-the-dark
Sweep searchlight: the rescuer moves through an expanding search pattern and must illuminate the missing person. Raise beacon: the rescuer stays put while a mobile missing person tries to recognize and approach an omnidirectional light. The page imports Three.js from a pinned CDN URL, so the first load needs internet access. Run the Monte Carlo comparison after each change. Both strategies ...

Topcoat: The full full-stack framework for Rust

https://opengraph.githubassets.com/0a8b416c3e6929d2f3fdbc1bfb976cba1b57680725a67ca76a6c4c7785e7f8e1/tokio-rs/topcoat
Topcoat is a Rust framework for building fullstack apps with simplicity and productivity. It renders markup on the server and uses a macro system for HTML and Rust control flow.

The state of open source AI

Open-source AI models are gaining traction globally, offering cost-effective, customizable solutions across sectors like healthcare, finance, and agriculture, with growing adoption by developers and enterprises. They enable ownership, interoperability, and resilience against vendor lock-in, though challenges in operational tooling and trust persist.

Three ways people respond to a problem (other than solving it)

https://storage.ghost.io/c/0b/84/0b8469de-9291-421d-a2ea-8f6dac76e930/content/images/2026/05/IMG_0482.jpeg
Consultants tackle entrenched problems, often revealing systemic issues where solutions shift, perpetuate, or create new problems due to flawed incentives. Success requires balancing problem-solving with strategic prioritization and recognizing that some issues persist because they benefit certain stakeholders.