Progress: I should be able to do proper planks and push-ups after this heals. It's a repair of Dupuytren's contracture - an often hereditary condition where the fascia thickens in your palm and pulls back on a finger or two, preventing you from putting your palm flat on a surface.
If anyone is curious, the marked (but not cut) incision is in the comment. Not recommended for people who get squeamish easily.
I asked for local anaesthesia so I was able to watch the surgery on a screen and chat up the surgeon. Apparently that is an unusual choice but it made life easier for everyone including me. 10/10 would do that again.
I didn't fill the prescription for heavy duty painkillers (yet) because I hoped that lesser painkillers might do the trick and still allow me to drive in the next day or two. So far, so good. I'll know in the morning if this was a dumb choice. It might be.
I'm supposed to wiggle my fingers a lot to avoid stiffness but that doesn't seem like loggable AP training. :)