A while back I built Synapse, a small app that answers questions using my own notes. I did every part of it by hand: load the files, turn them into vectors, find the closest ones to the question, and hand those to an LLM. It worked, and I understood ...

I’ve been revisiting JavaScript recently. Not because I’ve never used it before, but because I realised there were a lot of things I could recognise when I saw them in code without feeling fully confident that I understood them properly. That disti...