Hacker News Daily — July 21, 2026

30 stories · July 21, 2026

Plus This issue is new — delivery and download are for Plus until it ages into the free archive.

In this issue

1

Gemini 3.6 Flash, 3.5 Flash-Lite, and 3.5 Flash Cyber

blog.google · 509 points · Discussion

https://console.cloud.google.com/agent-platform/publishers/g...
2

Qwen-Image-3.0: Rich Content, Authentic Details, Deep Knowledge

qwen.ai · 509 points · Discussion

Read via the links — full text wasn’t available.
3

Apple defeats liability for not scanning iCloud for CSAM

blog.ericgoldman.org · 262 points · Discussion

This case involves Apple’s handling of user-uploaded files hosted in private iCloud storage. Instead of adopting PhotoDNA to scan hosted files for CSAM, Apple created its own proprietary alternative,…
4

Long presumed dead, a thriving coral reef is discovered in West Africa

e360.yale.edu · 240 points · Discussion

https://www.frontiersin.org/journals/marine-science/articles...
5

FreeInk: Open ecosystem for e-readers

freeink.org · 225 points · Discussion

Read via the links — full text wasn’t available.
6

Advertise in ChatGPT

ads.openai.com · 192 points · Discussion

Read via the links — full text wasn’t available.
7

OpenAI and Hugging Face partner to address security incident

openai.com · 183 points · Discussion

Read via the links — full text wasn’t available.
8

PCjs Machines

pcjs.org · 160 points · Discussion

Welcome to PCjs PCjs uses JavaScript to emulate a small collection of hardware and software that I grew up with in the 1970s and 1980s, allowing you to experience their slow CPUs, low-resolution…
9

Jack Dorsey launches Buzz to combine team chat, AI agents and Git hosting

runtimewire.com · 142 points · Discussion

https://x.com/jack/status/2079605800998146171, https://xcancel.com/jack/status/2079605800998146171 https://buzz.xyz/
10

The World's 2,400 Castles

thecastlemap.com · 140 points · Discussion

The interactive map of the world's castles & fortresses Castlemap is a free interactive map of 2,435 of the world's greatest castles, fortresses and palaces across 129 countries. Pan and zoom the…
11

'VPNs are lawful technical tools,' says EU Court in landmark copyright ruling

techradar.com · 126 points · Discussion

VPN providers aren't liable for copyright infringement, said the EU Court The Court explicitly recognized VPNs as "lawful technical tools" The case centered on the copyright battle involving Anne…
12

Laguna S 2.1

poolside.ai · 115 points · Discussion

Today we’re releasing Laguna S 2.1, a significant step forward in our development of models that pursue longer horizon work and make effective use of reasoning. Laguna S 2.1 is a 118B total parameter…
13

My USB Drive Has a Hidden Encrypted Vault

rootkitlabs.com · 109 points · Discussion

This article was written by a human, for humans. Many places don’t respect privacy laws, in certain situations you may be forced to unencrypt your media, or worse, assumed to be guilty. A Veracrypt…
14

The unreasonable difficulty of time series forecasting

suzyahyah.github.io · 90 points · Discussion

Preview I’ve been thinking recently about what makes time series forecasting problems so difficult compared to other sequence learning tasks or IID Machine Learning problems. First some motivating…
15

Meta's AI models are powering the first wave of Genesis Mission projects

ai.meta.com · 73 points · Discussion

https://www.energy.gov/undersecretaryforscience/genesis-miss...
16

France's Anssi Will Block PQC-Free Products from Certification Starting 2027

postquantum.com · 72 points · Discussion

Table of Contents My Analysis Another 2027 Procurement Gate The Hybrid Requirement Compounds the Challenge The Sovereignty Signal The Preparedness Gap What This Means in Practice June 17, 2026 —…
17

Apple has decided to compete for creativity app users

alex4d.com · 60 points · Discussion

Read via the links — full text wasn’t available.
18

Apple Private Cloud Compute SoC 3 audit reports

support.apple.com · 58 points · Discussion

Hardware Secure Apple products begin with a secure hardware foundation. That’s why Apple devices — using iOS, iPadOS, macOS, tvOS, visionOS or watchOS — have security capabilities designed into…
19

Cheap self-hosted Kubernetes on Hetzner cloud (2025)

blog.qstars.nl · 50 points · Discussion

This blog’s starter project can be found at github.com/qstarsit/hcloud-kube-hetzner Kubernetes is a brilliant workload API, the community has built a highly extensible standard which abstracts the…
20

Show HN: A self-running space economy SIM in Rust and Bevy

github.com · 46 points · Discussion

I built this with Claude cause I always wanted to tinker with a simulation economoy and I love space themes. A space-economy sim where nothing is scripted. A few hundred autonomous ships each run…
21

Uhubctl – control USB power per-port on smart USB hubs

github.com · 32 points · Discussion

uhubctl is utility to control USB power per-port on smart USB hubs. Smart hub is defined as one that implements per-port power switching. Original idea for this code was inspired by hub-ctrl.c by…
22

Show HN: CodeAlmanac – Karpathy-style codebase wiki from your conversations

github.com · 28 points · Discussion

Hey HN! This is Divit from Almanac (YC S26). We built CodeAlmanac, a wiki for your coding agents that updates as you talk to them. It is open-source, local, and free. Here’s a demo:…
23

The Price of Happiness (2024)

happiness-science.org · 25 points · Discussion

Abstract People typically think about money in raw units such as dollars. Yet research on money and happiness typically examines the association between happiness and the logarithm of income, or…
24

AI Agent – TRMNL

help.trmnl.com · 22 points · Discussion

Writing code is cool, but wouldn't it be cooler to type " build me a plugin showing populations around the world " and it Just Worked? Now you can. Requirements This feature is in public beta. Agent…
25

Slater – Low-memory graphdb designed for read-heavy graphs

github.com · 17 points · Discussion

Current version: v0.24.1 — all releases. In one line: Slater serves graphs that don't fit in memory — hundreds of millions of nodes and billions of edges in low hundreds of MB of RAM — over standard…
26

Greedy is optimal for single-pass semi-streaming matching

arxiv.org · 14 points · Discussion

View PDF HTML (experimental) Abstract: We prove that no single-pass semi-streaming algorithm (deterministic or randomized) can achieve a better-than-half approximation to the maximum matching problem.…
27

How to organize 3 acquired companies into one coherent website

littlelanguagemodels.com · 13 points · Discussion

Company A has acquired Company B, C, and D. How do we organize their sites, for multiple products with different audiences, while making it easy to find relevant product information and quickly…
28

Show HN: Justif – Knuth-Plass justification and microtypography for the web

justif.lyall.co · 12 points · Discussion

Justif is a drop-in JavaScript library that progressively enhances web pages to TeX-level text justification. Installation is a single <script> line, standard text and accessibility affordances are…
29

Conway's Game of Life, in real life

lcamtuf.coredump.cx · 12 points · Discussion

Read via the links — full text wasn’t available.
30

Show HN: Read the Tape – Wordle for daytrading, five blind S&P 500 charts a day

readthetape.cc · 9 points · Discussion

Read the Tape gives players the same 5 S&P500 stock charts per day to predict. You select low, medium or high confidence and then call the chart UP or DOWN. It's a 1d chart which then resolves over 5…