This looks good, but there's still a question.

`file-precious-flag` is handled by `basic-save-buffer`. This is a large
function designed for daily save usage, it will touch recentf and vc.
But for a cache/persistent file, we don't want to make big noise, we
just want to save it silently. We may need something like

(write-region nil nil "XXXX" nil nil)

Can we simplify this case?


Andreas Schwab writes:

> There is already file-precious-flag.
>
> Andreas.


-- 
Retrieve my public GPG key: https://meta.sr.ht/~citreu.pgp

Zihao