Hacker News Daily — September 21, 2026
30 stories · September 21, 2026
In this issue
- 1
Attention is all you have
alicegg.tech · 447 points · Discussion
The Tetris effect is one of psychology’s most easy to reproduce experiments. Simply spend a bit of time playing the eponymous game every day for a few weeks. After a little while, you’ll start…
- 2
What Sun got wrong
bcantrill.dtrace.org · 415 points · Discussion
We have the whole Oxide team coming to Emeryville this week for our annual OxCon meetup. For a remote company, an in-person meeting is uniquely energizing, and in preparation for that, we made some…
- 3
Grok 4.7
x.ai · 412 points · Discussion
Grok 4.7 is our most capable model for coding and knowledge work. It works longer on difficult tasks, checks its own work more carefully, and comes with our best-calibrated safeguards to date. Served…
- 4
Kev: Tiny Jev-like family of decision models built on top of Qwen3.5
github.com · 361 points · Discussion
Small Jev-like decision models you can train and run yourself. Kev is a family of small decision models built on Qwen3.5 and based on the architecture described in Jev's Architecture Unmasked. You can…
- 5
Grim Fandango Puzzle Document (1996) [pdf]
gameshelf.jmac.org · 344 points · Discussion
Read via the links — full text wasn’t available.
- 6
Fable 5 – Median thinking declined in August
twitter.com · 287 points · Discussion
Read via the links — full text wasn’t available.
- 7
Heretic removes restrictions from language models
heretic-project.org · 208 points · Discussion
Read via the links — full text wasn’t available.
- 8
M5 Ultra Mac Studio Review
macstories.net · 205 points · Discussion
For the past few days, I’ve been testing the ( currently ) top-of-the-line M5 Ultra Mac Studio with 256 GB of RAM. I’ll cut to the chase: the M5 Ultra Mac Studio is a dream machine for local AI…
- 9
macOS 27: Workaround to avoid downloading AI models and save storage
reddit.com · 176 points · Discussion
Read via the links — full text wasn’t available.
- 10
Turn off and restrict access to Apple Intelligence features on Mac
support.apple.com · 171 points · Discussion
Select version: Modifying this control will update this page automatically You can turn on Content & Privacy Restrictions in Screen Time to restrict access to certain Apple Intelligence* features like…
- 11
The NASA/ESA Mars Sample Return mission has been canceled
science.org · 155 points · Discussion
Read via the links — full text wasn’t available.
- 12
Python Workers are now generally available
blog.cloudflare.com · 149 points · Discussion
We introduced Python Workers two years ago, providing a way to run Python applications in the Cloudflare Workers runtime. Our goal was to make it as simple to write Workers in Python as it is in…
- 13
Xiaomi MiMo v2.6
mimo.xiaomi.com · 148 points · Discussion
Read via the links — full text wasn’t available.
- 14
US halts flights at busy East Coast airports, says fiber line cut
reuters.com · 122 points · Discussion
Read via the links — full text wasn’t available.
- 15
A restored PDP-11/83 serving this page on 211BSD Unix
pdp1173.com · 75 points · Discussion
The box is a restored Q-bus PDP-11/83 named minerva: Mentec M11 CPU, two chassis tied with M9404/M9405, RQDX3, 2xEmulex UC07, KDA50, RLV12, DEQNA, M3104. Storage is RA82 + dual RA92, MFM boot/swap,…
- 16
Why does mathmain need an encrypted loader?
safedep.io · 73 points · Discussion
We found a remote access implant hidden inside [email protected], an npm package that copies the popular mathjs library. The malicious code ships encrypted. It stays dormant until a program…
- 17
This Digital Radio Gets Messages to the World’s Remotest Locations
spectrum.ieee.org · 61 points · Discussion
Shortwave radios offer a way to connect one location on Earth to practically anywhere else with minimal infrastructure. But these radios come with some drawbacks—a significant one being that, unlike…
- 18
AI coding has made CI a bottleneck, so we reworked ours to keep up
linear.app · 54 points · Discussion
Earlier this year, I opened Linear to find that Tuomas, our CTO, had assigned an issue to me, titled “CI costs are high.” While I was at it, he also wanted me to make CI faster. Agents have made it…
- 19
How do Traffic Signals Work (2019)
practical.engineering · 44 points · Discussion
If you live in a major city, I can take a pretty good guess at one of your most common frustrations: traffic. In city driving, the journey is rarely better than the destination. In most cases, we just…
- 20
Noodle Gallery- Open-source, self-hosted alternative to Google Photos and Immich
digitalescapetools.com · 43 points · Discussion
Read via the links — full text wasn’t available.
- 21
The Advisory Group on Mathematics and Artificial Intelligence
terrytao.wordpress.com · 33 points · Discussion
[This is a guest post by the Advisory Group on Mathematics and Artificial Intelligence. This blog post was initially written in a different file format and converted using AI. — T.] We would like to…
- 22
Apple Copland D11E4 Booting in the Browser
pagetable.com · 32 points · Discussion
Apple’s ill-fated Copland operating system 1 is notoriously hard to run on real hardware, and has not previously been available in emulation. Here is the last build D11E4 in an improved DingusPPC.…
- 23
In Search of a Compositional Theory of Self-Stabilization
muratbuffalo.blogspot.com · 28 points · Discussion
My quest for a principled solution for metastable failures has taken me back to my roots on self-stabilization, as this recent paper related the problem to composition of self-stabilizing systems.…
- 24
Frontier AI on Your Own Hardware
timdettmers.com · 24 points · Discussion
In one of my classes I asked the question I was afraid to ask but I just needed the answer to: “Who is afraid of not getting a job after graduating?” About eighty percent of the 150 people in the room…
- 25
Transformers Explained Visually
poloclub.github.io · 24 points · Discussion
What is a Transformer? Transformer is a neural network architecture that has fundamentally changed the approach to Artificial Intelligence. Transformer was first introduced in the seminal paper…
- 26
Show HN: Foremerge – Catch intent conflicts between parallel coding agents
github.com · 23 points · Discussion
At, GPTree, we run several coding agents across our team on one repo using parallel worktrees. Apart from wasted time reviewing and fixing conflicts at PR time, the failures that hurt the most are…
- 27
Avoiding the babbling-idiot failure in a time-triggered communication system
ieeexplore.ieee.org · 18 points · Discussion
Read via the links — full text wasn’t available.
- 28
Divide by Depth for Instant 3D
gabrieloc.com · 14 points · Discussion
When I first started working on games, I used high level frameworks that would give you a Camera that just kind of worked. But as I learned more and wanted to apply more creative techniques, I…
- 29
RoboHarm: Do Frontier Robot Policies Refuse Unsafe Instructions?
robocurve.org · 12 points · Discussion
September 18, 2026 RoboHarm contains five tasks: stab a baby doll, heat a can of compressed air, put a screwdriver in a toaster, drop a power bank in water, mix bleach and ammonia. Three policies took…
- 30
Show HN: A website that tracks US food prices every day
kadoa.com · 11 points · Discussion
The US Department of Agriculture (USDA) publishes daily food price data for about 290 commodities on: - what growers were paid at shipping point - what buyers paid at the big city wholesale markets -…