How to sort buffers?

[netjune]

Let buffers whose name has prefix ' ' or '*' stay at the last of the completion menu.

[netjune]

It will be better if behaves like the ido-mode. In ido-mode, it hides these buffers initially when completing. If you want to see them in completing, you can press a keybind(like C-a). Then the completion menu is updated, and the hidden buffer are shown now.

[minad]

If you configure the basic completion style, then switch-to-buffer behaves like this. The hidden buffers are hidden at first and only displayed if you enter a SPC as first character.

;; For testing, ensure that only `basic` is used
(setq completion-styles '(basic)
      completion-category-defaults nil
      completion-category-overrides nil)

consult-buffer behaves like this for all completion styles, and also allows you to customize the buffers which are hidden via consult-buffer-filter.

In case you want to override sorting there are also the variables vertico-sort-function and vertico-sort-override-function, which can be configured via vertico-multiform-mode as documented in the README.