As much as one could "nitpick" about ommisions or unnecessary points, for large companies these things are obvious yet necessary. I also liked the writing style guides that Microsoft and Google put out in recent years: - https://docs.microsoft.com/en-us/teamblog/style-guide - https://developers.google.com/style/highlights
Glad you shared these valuable resources. As a self-taught coder, I always admired the quality in writings published by these big orgs but I couldn't emulate them.
On the links you get access to various clear guidelines which are quite helpful for open-source technical docs and project description. Thank you Ser.