Hacker News Daily — June 30, 2026
30 stories · June 30, 2026
In this issue
- 1
Claude Code is steganographically marking requests
thereallo.dev · 1042 points · Discussion
I was inspecting Claude Code for privacy reasons. Most devs give their harnesses ridiculous access. FS, shell, git, browser access, even computer use nowadays. That is the whole point. They need…
- 2
Claude Sonnet 5
anthropic.com · 625 points · Discussion
Claude Sonnet 5 is built to be the most agentic Sonnet model yet. It can make plans, use tools like browsers and terminals, and run autonomously at a level that, just a few months ago, required larger…
- 3
Open Source Low Tech
opensourcelowtech.org · 600 points · Discussion
My name is Daniel Connell. I prototype and develop basic technologies which anyone can make using recycled materials and simple tools. The aim is for everyone everywhere to be able to build and…
- 4
County with 37 Data Centers Asks Schools to 'Conserve Electricity'
404media.co · 361 points · Discussion
On June 26, the County Manager of Henrico County, Virginia, John Vithoulkas, sent an email to thousands of county employees asking them to help the local government conserve electricity. “Beginning…
- 5
Building a custom octocopter from scratch with no prior hardware experience
karolina.mgdubiel.com · 284 points · Discussion
Since posting on X, I've gotten many DMs asking exactly how I want to approach the next phase of this project: making the drone fly with RL. Here's the plan I have so far. Most importantly, the RL…
- 6
Claude Science
claude.com · 255 points · Discussion
The Claude Science app runs analyses, searches databases, and traces every step from data wrangling to publication, so you can spend time on science. View proteins, structures, and molecules natively,…
- 7
Nano Banana 2 Lite
deepmind.google · 217 points · Discussion
Create more for less with Nano Banana 2 Lite. Generate and edit images faster and more efficiently than ever before. Capabilities Hands-on Comparisons Showcase Performance Safety Try Nano Banana 2…
- 8
Knoppix
knopper.net · 199 points · Discussion
What is KNOPPIX ®? KNOPPIX is a bootable Live system on CD, DVD or USB flash drives, consisting of a representative collection of GNU/Linux software, automatic hardware detection, and support for many…
- 9
Crypto firms have spent $189M so far on 2026 US election, report says
reuters.com · 185 points · Discussion
Read via the links — full text wasn’t available.
- 10
Tell HN: Installing Cursor on iOS irreversibly changes your privacy settings
147 points · Discussion
Just hit this today and I'm furious. I installed the Cursor iOS app to see what it had. I've been on `Privacy Mode (Legacy)` for a long time, which is the "Do not store my code" setting. A year or so…
- 11
Memoirs of Extraordinary Popular Delusions and the Madness of Crowds (1852)
gutenberg.org · 146 points · Discussion
"Memoirs of Extraordinary Popular Delusions and the Madness of Crowds" by Charles Mackay is an early study of crowd psychology first published in 1841. This journalistic work examines humanity's…
- 12
Factorio 2.1 Experimental Release
factorio.com · 133 points · Discussion
Hello, we hope your week has been pleasant. 2.1 Experimental This week we released the 2.1 experimental. You can read the full changelog on our Forum. Funnily enough, the changelog was too long to…
- 13
Zluda 6 release (run unmodified CUDA applications on non-Nvidia GPUs)
vosen.github.io · 125 points · Discussion
ZLUDA allows to run unmodified CUDA applications on non-NVIDIA GPUs ZLUDA update Q1&Q2 2026 - back to the roots 2026-06-29 Hi, and welcome to the latest ZLUDA update! Since I skipped the last update,…
- 14
1.38 Millimeter Microcontroller
ti.com · 121 points · Discussion
ACTIVE 24MHz Arm® Cortex®-M0+ MCU with 16KB flash, 1KB SRAM, 12-bit ADC CPU Arm Cortex-M0+ Frequency (MHz) 24 Flash memory (kByte) 16 RAM (kByte) 1 ADC type 12-bit SAR Features 5-V-tolerant I/Os, DMA,…
- 15
I built a mmWave material classification radar
gauthier-lechevalier.com · 98 points · Discussion
Software is now a commodity thanks to Claude Code. So the next step is obviously hardware. I spent the last 6 months on building a hardware startup, which was fucking hard. I made a radar that could…
- 16
A peek into Reddit's anti-spam internals
lyra.horse · 52 points · Discussion
\[](/abspin) --> 5 years ago, back when I still used Reddit, something unusual happened. My app of choice, Relay for reddit, was bombarding me with a bunch of weird notifications about removed spam.…
- 17
Don't Make Gates Optional, Make Them Flexible
wakamoleguy.com · 42 points · Discussion
Don't Make Gates Optional, Make Them Flexible June 26, 2026 When you need an approval checkpoint but don't want it everywhere, make the gate required but flexible in formality rather than optional but…
- 18
Counterexamples in type systems (2021)
counterexamples.org · 35 points · Discussion
Counterexamples in Type Systems Introduction Index and Glossary 1. Polymorphic references 2. Covariant containers 3. Incomplete variance checking 4. Objects under construction 5. Curry's paradox 6.…
- 19
Set up your own DoH (DNS over HTTPS) service
nochan.net · 33 points · Discussion
Read via the links — full text wasn’t available.
- 20
CERN bids farewell to the LHC and enters Long Shutdown 3
home.cern · 32 points · Discussion
https://www.nikhef.nl/en/news/final-run-for-the-current-lhc-...
- 21
Matrix URIs, a URL syntax from Tim Berners-Lee that never shipped (1996)
w3.org · 27 points · Discussion
Read via the links — full text wasn’t available.
- 22
SedonaDB 0.4: GPU-accelerated spatial joins
sedona.apache.org · 27 points · Discussion
In SedonaDB 0.4, we taught this Rust database to run spatial joins on your $1,500 gaming GPU's ray tracing cores, and it beats an H100. The Apache Sedona community released SedonaDB 0.4.0, resolving…
- 23
I built a 10 inch mini rack from aluminium extrusions
louwrentius.com · 25 points · Discussion
I built a 10-inch mini rack from aluminium extrusions and I had a lot of fun doing it. I want to share my build in this post. In January of 2025, Jeff Geerling released a video about 10-inch mini…
- 24
Reading the internals of Postgres: Database cluster, databases, and tables
buraksen.dev · 24 points · Discussion
I'm delving into Postgres Internals and while doing that I thought it would be better to write my notes to keep me accountable and try to internalize my readings. Thanks Hironobu Suzuki for this great…
- 25
Waveloop: What Fable left me
neynt.ca · 19 points · Discussion
Over the two days we had Fable 5, it made me a music visualizer. This is the realization of something I have daydreamed about for as long as I can remember. You can see it here: Waveloop The idea is…
- 26
A Fake Shell for Pangenomics
cs.cornell.edu · 19 points · Discussion
I have been working on an efficient toolkit for pangenomics, called FlatGFA. Relative to other pangenomics tools like odgi, FlatGFA has only one trick: a zero-copy data format. The in-memory data…
- 27
How does a pull-back car work? Illustrated teardown
mechanical-pencil.com · 17 points · Discussion
Gears are all around us.  Clocks, cars, bikes, even your printer has countless gears! For the purposes of this analysis, we'll focus on two properties of gears: gears can be used to multiply…
- 28
Claude Sonnet 5 – benchmark results
artificialanalysis.ai · 15 points · Discussion
Read via the links — full text wasn’t available.
- 29
I ported Kubernetes to the browser
ngrok.com · 14 points · Discussion
https://github.com/ngrok/webernetes https://webernetes-demo.ngrok.app/
- 30
RF Hacking My Cloud-Controlled Ceiling Fan
samwilkinson.io · 13 points · Discussion
RF Hacking my Cloud-Controlled Ceiling Fan 2026.06.24 · 8 min read When we moved into our current place, we knew pretty quickly we'd want to change our bedroom ceiling fan. That thing easily covered a…