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Mapping the US healthcare system’s financial flows
Mapping Every Dollar of America's $5 Trillion Healthcare System
Top posts
Every blog post that took off on Hacker News, ranked by the votes of its best submission. 4,109 posts.
2462
Can your terminal do emojis? How big?
Emojis are great. They're particularly useful to put in the output of scripts and get some eye catching output. At least provided they aren't overused, just like colour.
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The Mozilla Cycle, Part III: Mozilla Dies in Ignominy
Mozilla's new strategy document confirms their position, and the end of their stewardship of the open web.
2464
Dear GitHub: no YAML anchors, please
This was a good thing . YAML anchors in GitHub Actions are (1) redundant with existing functionality, (2) introduce a complication to the data model that makes CI/CD human and machine comprehension harder, and (3) are not even uniquely useful because GitHub has chosen not to support the one feature (merge keys) that…
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Pairing with Claude Code to rebuild my startup's website
Adventures using AI agents, especially Claude Code, and MCP Servers
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I got the highest score on ARC-AGI again swapping Python for English
Using Multi-Agent Collaboration with Evolutionary Test-Time Compute
2467
Claude is the drug, Cursor is the dealer
Coding Tools Are Just One Front in AI’s Supply Chain Wars
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A very Chicago gamble
Chicago and Bally's have teamed up in an investment offering.
2470
A series of vignettes from my childhood and early career
When I was younger, I really liked programming! I loved the sense of accomplishment, I loved the problem solving, I loved sharing what I made with the people around me to both amuse and assist.
2471
The Unknotting Number Is Not Additive
On June 30, 2025, Mark Brittenham and Susan Hermiller uploaded a preprint to the arXiv called “Unknotting number is not additive under connected sum” (and an updated version on Septembe…
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Stepping Back
The other day I was playing around with Claude Code, experimenting with porting some C code to Rust - not for any particular reason, just because I was curious how well it could do. As these things happen, I got more and more invested in the process, instead of just letting Claude do something and noting what…
2473
The most famous carbon dioxide absorber
The Apollo 13 astronauts were stranded in space. Their survival depended on if they could make a carbon dioxide absorber inside the spacecraft.
2474
Building a Durable Execution Engine with SQLite
Lately, there has been a lot of excitement around Durable Execution (DE) engines. The basic idea of DE is to take (potentially long-running) multi-step workflows, such as processing a purchase order …
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Can a model trained on satellite data really find brambles on the ground?
Can a model trained on satellite data really find brambles on the ground? We put a new model to the test with a field trip around Cambridge. The results...
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Text case changes the size of QR codes
Changing the case of text can change the size of the corresponding QR code. This is one of the reasons Bitcoin moved from Base58 to bech32 encoding.
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Fourier Transforms
Fourier Transform
2480
Language Support for Marginalia Search
One of the big ambitions for the search engine this year has been to enable searching in more languages than English, and a pilot project for this has just been completed, allowing experimental support for German, French and Swedish. These changes are now live for testing, but with an extremely small corpus of…
2481
Linux kernel cgroups writeback high CPU troubleshooting
Read on to learn how we used network packet captures and BPF to debug web server performance, ultimately uncovering a Linux kernel performance issue. This investigation was a collaboration between myself and my colleagues.
2482
The Family Bass - Music with an NES
I connected a Family BASIC keyboard to an NES via a bespoke adapter in order to play its unique triangle waveform live.
2483
210 IQ Is Not Enough
You will never have enough IQ, nor money, nor time, nor energy.
2484
Tim Bray on Grokipedia
Last night I had a very strange experience: About two thirds of the way through reading a Web page about myself, Tim Bray, I succumbed to boredom and killed the tab. Thus my introduction to Grokipedia . Here are early impressions.
2485
Who needs Git when you have 1M context windows?
Lately I’ve heard a lot of stories of AI accidentally deleting entire codebases or wiping production databases . But in my case it was the other way around. I removed some working code and the LLM helped me to recover it.
2486
You Don't Need Anubis
don't use anubis just to block llm scrapers
2487
Why you can’t grow cool-climate plants in hot climates
Since moving to Deep South Texas 4 years ago I've come to realize that many plants I used to love growing in the cool mild maritime climate of the SF bay area are impossible to grow where I live. This is not just because of the high daytime heat. It's not as simple as that. Specifically, it is the h
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Today I learned that bash has hashmaps (2024)
Xe Iaso's personal website.
2490
Using an $8 smart outlet to avoid brainrot
I wrote a small script that runs in the background, polling for the state of an $8 smart plug .