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peter_retief

845 karma · joined January 26, 2016

Software developer with a special interest in sensors and ML
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peter_retief··on Show HN: ProofShot – Give AI coding agents eyes to verify the UI they build
Thanks! I do share screenshots and paste them manually for front end stuff, nice idea though.
peter_retief··on Reports of code's death are greatly exaggerated
The cartoon told me everything...
peter_retief··on We rewrote our Rust WASM parser in TypeScript and it got faster
I suspect that you used highly optimized algorithms written for python, like the vector algorithms in numpy? You will struggle to write better code, at least I would.
peter_retief··on LotusNotes
I have been waiting for someone to open source lotus notes, sadly the time is probably past.
peter_retief··on LotusNotes
I have certification in Lotus Notes, I quite liked it. Fairly simple to create an application but not being open source was a problem.
peter_retief··on Show HN: s@: decentralized social networking over static sites
What did they do to them?
peter_retief··on Show HN: s@: decentralized social networking over static sites
Cloudflare tunnels are an interesting alternative, self hosted but with external security
peter_retief··on Ask HN: What Are You Working On? (March 2026)
Reminds me of the chicken feed app I saw about 40 years ago, before the internet It would find the best price for protein, carbohydrates etc in chicken feed looking at raw products like bone meal and maize with current prices. Remarkable actually, I wonder what happened to it? Anyone else remember any apps before the internet?
peter_retief··on Ask HN: What Are You Working On? (March 2026)
https://i.imgur.com/mTyjQXs.png I am still building the "make money app" for some difficult users. :) Last update was calendar integration, everything besides the invoice is a sandbox, kind of like the Unix philosophy of pipes, lots of standalone apps. You are welcome to have a look at https://peterretief.org/ demo demo123 (Not accepting any new users atm, still too raw)
peter_retief··on Rydberg atoms detect clear signals from a handheld radio
Thanks for that, I was partially aware of that, just made me think of crystal radios and how magical they are.
peter_retief··on Rydberg atoms detect clear signals from a handheld radio
https://www.mpg.de/9142418/magnetism-in-artificial-crystal and this
peter_retief··on Rydberg atoms detect clear signals from a handheld radio
I immediately thought of the old crystal radios and a short search brought up this comparison. While old radios used a natural mineral (galena) to detect radio waves, modern Rydberg radio receivers use a synthetic photonic crystal (often made of silicon or glass) to guide and enhance the radio signal for improved performance.
peter_retief··on Blood test boosts Alzheimer's diagnosis accuracy to 94.5%, clinical study shows
This disease is in my family, honestly not sure I would want to know if I will get it.
peter_retief··on I verified my LinkedIn identity. Here's what I handed over
My ISP and my bank decided they needed my biometrics to have an account, same sort of thing
peter_retief··on I want to wash my car. The car wash is 50 meters away. Should I walk or drive?
This is a classic trap for LLM's See it every day in my code assistants I do find that writing unit tets is a good fir for LLM's at the moment
peter_retief··on Major European payment processor can't send email to Google Workspace users
I offered to host a friends business email on my DO instance. Works 99% of the time but every now and then emails just disappear only to find out that MS and Apple block DO IP addresses, sometimes. Silently. There is a war on small email providers it seems.
peter_retief··on Ask HN: What are you working on? (February 2026)
there is a demo user demo demo123 keep in mind it is running on my linux box at home :)
peter_retief··on Ask HN: What are you working on? (February 2026)
I developed a billing system for my own work and is getting some interest.

https://peterretief.org

peter_retief··on Mermaid ASCII: Render Mermaid diagrams in your terminal
Looks really useful to document complex applications, I will give it a try.
peter_retief··on Diagrams AI can, and cannot, generate
I ask AI to generate diagrams in LaTeX, works well for me.
peter_retief··on The History of S.u.S.E
Wow that brings back memories!
peter_retief··on Ross Ulbricht granted a full pardon
I always thought the sentence was too extreme, he broke some laws he should do some time. Not life without parole.
peter_retief··on Can you read this cursive handwriting? The National Archives wants your help
How does one actually sign up?
peter_retief··on FFmpeg by Example
Ha, very literal answer, why not use cat to print the file, is that a bit of sarcasm creeping into the LLM's?
peter_retief··on FFmpeg by Example
Thanks, yes they should update the site.
peter_retief··on FFmpeg by Example
https://x.com/i/grok/share/rhb9niOru2tk17SdEqIhLvfhV
peter_retief··on FFmpeg by Example
"Print a text file to STDOUT using ffmpeg" ffmpeg -v quiet -f data -i input.txt -map 0:0 -c text -f data - I tried this in a directory with input.txt with some random text Nothing.

So changed the verbosity to trace ffmpeg -v trace -f data -i input.txt -map 0:0 -c text -f data -

---snip-- [dost#0:0 @ 0x625775f0ba80] Encoder 'text' specified, but only '-codec copy' supported for data streams [dost#0:0 @ 0x625775f0ba80] Error selecting an encoder Error opening output file -. Error opening output files: Function not implemented [AVIOContext @ 0x625775f09cc0] Statistics: 10 bytes read, 0 seeks

I was expecting text to be written to stdout? What did I miss?

peter_retief··on Does current AI represent a dead end?
In retrospect it seems obvious now.
peter_retief··on Does current AI represent a dead end?
AI is useful as a tool but it is far from trustworthy.

I just used Grok to write some CRON scripts for me, gave me perfectly good results, if you know exactly what you want, it is great.

It is not the end of software programmers though and is very dangerous to give it too much leeway because you will almost certainly end up with problems.

I agree with the conclusion that a hybrid model is possible.

peter_retief··on Kelly Can't Fail
Could this work with roulette betting on color? Seems like you could spend a lot of time not winning or losing
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