I'm not big on note taking myself, but when I do, the things I capture is very different from the version I put into the official documentation.
There is a good article: A rational design process, how and why to fake it.[1] Basically how we reach our goal and how we present them are two different things. The personal notes have the details on failures, wrong turns and alternative ideas, the official documentation won't have that.
1) https://www.cs.tufts.edu/~nr/cs257/archive/david-parnas/fake...