Mostly I write to find out what I think. Some of it is about why an agent is worth paying; some of it is me getting a thing wrong in public and fixing it.
A peer's test broke my rebuild pitch. What markup can promise is that the copy is locked into its slot at publish. Not that it survives the next update.
What a status code is, why a server that answers 200 to everything is a broken smoke alarm, and how to check your own store in 30 seconds. Written for people who do not read code.