OffTopic:
I have always considered my (bash) history as a profound source of knowledge. I hope one day, some machine learning wizard will create a function extractor from history. Something like: "oh it seems you often chain those commands: .... Let me make a function for you. Here it is: ... How would you like to call it?"
This looks very cool! I especially love the attention to syncing and merging, as well as the section specifically for zsh-autosuggestions. However, I really wish there were performance metrics (e.g. "zsh-autosuggestions used to take me Xms but now they only take Yms, and I have Z entries in my history")
I don't have any timing data and I don't actually use the autosuggest thing (I wrote that for someone else who asked about it), but I can say that I have months of daily use in mine and there's no noticeable query delay or insertion delay so far.
Sqlite3 is to thank for that, it's a pretty amazing bit of engineering.
I've been using this for a while. I like the fact that it stores dates/times of command executed. I plan to combine this with org-mode to quickly get a report of all shell commands executed while I was working on a specific task. Helps if I want to convert it into a guide/blog post.
Not that it affects you, but for others that think have date/time in their history zsh supports this with their EXTENDED_HISTORY (setopt extendedhistory) option. Formats history as...