I've said this time and time again but with LLMs I got the joy of being a little kid learning to code and build stuff again. I haven't had such a custom-built setup since my earliest college days, because I had lost the time to tinker and looked for stuff that just worked. Now tinkering is so much easier that I mod the software I use all the time as well.

For example, I needed to change something in a particular function of firefox (which was in and of itself an amazing claude adventure to find that solved a problem I've had for well over 2 years), but only that very specific function.

I didn't want to fork firefox and have to constantly rebuild it just because of this one function. So I setup an LD_PRELOAD (well, not LD_PRELOAD, but the macOS equivalent) trick that injects only my modified function, as well as a full mechanism that traps firefox's auto-update process to reinject/re-arm the LD_PRELOAD trick into newer versions. I've had it going on for 3 months without any issues.

I counted and I have about 18 custom built apps ranging from "full blown swift GUI" to "tiny helper script" that have really changed how I interact with my computers for the better. It's so cool to be living this revolution.