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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 Ask HN: What are you working on? (August 2026)
good luck, nice idea, agents are fun and a bit scary sometimes!
peter_retief··on Premier league bans gambling sponsors
Gambling feeds on human misery, it should never be normalized, they made the right decision.
peter_retief··on Why the future is local app
I am using the older version of raspberry pi 3 B+ to host mail and web services locally behind firewalls. There is a use case here for developing for remote areas that have unreliable internet and power. Still a way to go but there is something in place. This site is a beta running from my lounge at home. https://localboxmail.co.za/software.html
peter_retief··on More Tailscale tricks for your jailbroken Kindle
My son wants to throw it away, I want to at least try and reuse it.
peter_retief··on More Tailscale tricks for your jailbroken Kindle
Any suggestions for an ancient Chromebook?

Have one that is managed by a school from 10 years ago and they failed to release the device.

I am a fan of alpine Linux which i think may work well on an old Chromebook.

Any suggestions/links welcome

peter_retief··on Teach yourself programming in ten years (1998)
I have mixed feelings about this, I hate the loss of slow "discovery" and the warm fuzzy feeling when you understand something that used to be Greek to you (unless of course you are Greek) The piles of programming books, sadly many unread but admired on the shelf from afar. Now I create programs in languages I only vaguely understand and run remote servers without even logging in, it feels slightly shameful but then we are all complicit
peter_retief··on Codeberg bans vibe coded projects
Absolutely, I give my agents access to MCP/API and they can check logs and setup checks for potential problems and whatever else
peter_retief··on Codeberg bans vibe coded projects
It is a really interesting debate, it seems to be a type of abstraction at least, with an interface as a natural language instead of a typed schema.
peter_retief··on Codeberg bans vibe coded projects
Neither really solved the problem, reality is too nuanced, AI fills the gap.
peter_retief··on Codeberg bans vibe coded projects
wow this is murky water, I love the abstraction of AI, I feel like the director of an orchestra creating beautiful music in code.

I always resented having to write the same code over and over, now automated by AI

but also support free and open software, as all knowledge should be

peter_retief··on AWS: Inaccurate Estimated Billing Data – $1.7 billion
I got a bill for about R900 for just having a look at some of their services?

I will never use them again, they are huge so probably dont really care about small users

I have actually replaced most of what they do with Raspberry Pi's using cloudflare tunnels

peter_retief··on G# – A modern .NET language with Go, Kotlin, and Swift ergonomics
Yes even I have used C#

My anti MS is a reflex from many years of torment!

peter_retief··on G# – A modern .NET language with Go, Kotlin, and Swift ergonomics
I love Go but am not a fan of .NET

Have to ask what is the point of .NET is it even needed being the navel gazing MS fraternity?

peter_retief··on The Tower Keeps Rising
It is a great analogy.

Also quite like Linus Torvalds likening of AI to a compiler.

He argues that calling AI the "author" of code is the equivalent of saying a compiler wrote your code.

He views AI as an incredibly powerful productivity layer, much like the historic progression from machine code to assemblers, and then to higher-level compilers!

peter_retief··on Designing and assembling my first PCB
I have made boards but never actually used them (the delay between need and supply is too long for me)

I wish I could 3d print a board with all its components - instant gratification (which incidentally was one of my half baked projects)

peter_retief··on A road to Lisp: Why Lisp
Fair enough.
peter_retief··on A road to Lisp: Why Lisp
The real test of a programming language is its readabilty.

I looked at lisp many times and it just doesn't do it for me.

peter_retief··on Workers Cache
Could this apply to workers that ingest email?
peter_retief··on Ford hired AI and sacked humans. It backfired badly
who would have thought :)
peter_retief··on There is minimal downside to switching to open models
What open models are "recommended"?

I like the Linux analogy, I struggled with Linux way back.

peter_retief··on Ask HN: What are you working on? (June 2026)
I have 3 new projects atm

1) Local hosted https://app.localmail.uk/ 2) Security guard android app 3) Fall detector android app

https://site.localmail.uk/

The sites are AI generated and are a bit OTT and slightly inaccurate, but think of it like reading a comic...

peter_retief··on The Speed of Prototyping in the Age of AI
I created three throwaway android apps in an afternoon to test my code. (All fairly well written)

In software it is now possible to test ideas instantly, this is great for people like me that have so many ideas.

peter_retief··on Show HN: Posthorn, self-hosted mail without the mail server
It has been running for about 20 days, have a small companies email and web site running locally.

Would like to publish the setup so others can try it out as well.

A fun thing was to route local domain emails locally so they never have to leave the server.

Very little maintenance so far, mustn't speak to soon though.

peter_retief··on Show HN: Posthorn, self-hosted mail gateway
I am running a local mail server using cloudflared tunnels and brevo for sending

postfix/sendmail/dovecot/ingress setup

I am really happy with the setup. (So far)

peter_retief··on Google changes its search box
I saw this and decided it would be great for tracking my vegetable patch,

when i planted seeds,

when are they expected to germinate

when do i need to water

when will I get to harvest

Watering would be based on weather conditions

Did i misunderstand the concept?

peter_retief··on LLMs corrupt your documents when you delegate
I am surprised that not more people talk about this, I once had an ssh key deleted, so unexpected it took me a while to debug.

We live and learn.

Still a huge fan though.

peter_retief··on My billing system, it could be useful to some
It has become too many things but it still works. Have a look at LaTeX
peter_retief··on AI Tremor-Print: Biometric Identification System
I would be very interested for as many people as possible to test this and give feedback. Particularly testing with different postures, hands, walking, different sensors etc. Very simple to setup and does not require expensive hardware.
peter_retief··on Ask HN: What Are You Working On? (April 2026)
I have always wanted to buy my food directly from farms but the logistics is daunting.

So I am creating an ambitious app that uses agents

Admin: -> handles all financial transactions and manages the app

Subscriber:-> entity who orders/shops

Market: -> the agents that work with the farmers or markets

Catering: -> for any processing or recipes

Delivery: -> handles cold chain, delivery, storage

Initially I will do everything but the idea is to delegate the agents

The basic structure is in place

https://github.com/peterretief/orderin

peter_retief··on I run multiple $10K MRR companies on a $20/month tech stack
AWS is not value for money, I do have a DO account that is great but my development is mostly hosted locally with tunnels from cloudflare, it is remarkable how far you (I) can get with that setup.
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