Geir Isene writes about building personal software, including an assembly login shell, an X server and a 64-bit OS with Claude Code.
HN commenters link his Audience of One posts to the trend of bespoke, AI-written software and dotfiles, and look through his Rust tools.
Be your customer, write the software just for you, AI is so effective that you could do something meaningful for you just in spare tine.
Here is the similar perspective: https://isene.org/2026/05/Audience-of-One-Numbers.html
I was misunderstood you if you intend to write code by hand, I still did, I use AI to learn by example, but I write the real code myself, AI can help me improve the code. I learned a lot.
To be honest, I mostly use a physical calculator (Swissmicros DM41L, which is an HP41CX clone). Second choice is the i41CX+ app on my phone. The HP41 keyboard and operational patterns were etched into my brain at university, since my first engineering calculator was an HP41C.
I have used rpncalc and T_REX (https://isene.org/2021/02/T-REX.html) in the terminal, dc or gforth in a pinch.
Was browsing some of the other rust projects(https://isene.org/fe2o3/#tools) and https://github.com/isene/torii says "Mozilla removed Firefox's "Open network login page" banner". I'm on windows and still see the banner so don't know if this is true. Is the really true on Linux?
This reminds me of the other article posted on here, https://isene.org/2026/05/Audience-of-One.html Everyday more bespoke dotfiles are coming online for an audience of one. I am not surprised that this is coming to hardware as well.
CHasm: https://isene.org/chasm/
Fe2O3: https://isene.org/fe2o3/
https://isene.org/2026/05/Audience-of-One.html