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+;;; +completions.el --- Better default completions  -*- lexical-binding: t; -*-
+
+;; From https://robbmann.io/posts/emacs-29-completions/
+
+(defun minibuffer@bindings ()
+  (unless vertico-mode
+    ;; Up/down when completing in the minibuffer
+    (define-key minibuffer-local-map (kbd "C-p") #'minibuffer-previous-completion)
+    (define-key minibuffer-local-map (kbd "C-n") #'minibuffer-next-completion)
+
+    ;; Up/down when competing in a normal buffer
+    (define-key completion-in-region-mode-map (kbd "C-p")
+                #'minibuffer-previous-completion)
+    (define-key completion-in-region-mode-map (kbd "C-n")
+                #'minibuffer-next-completion)))
+
+(add-hook 'vertico-mode-hook #'minibuffer@bindings)
+
+(defun renz/sort-by-alpha-length (elems)
+  "Sort ELEMS first alphabetically, then by length."
+  (sort elems (lambda (c1 c2)
+                (or (string-version-lessp c1 c2)
+                    (< (length c1) (length c2))))))
+
+(defun renz/sort-by-history (elems)
+  "Sort ELEMS by minibuffer history.
+Use `mct-sort-sort-by-alpha-length' if no history is available."
+  (if-let ((hist (and (not (eq minibuffer-history-variable t))
+                      (symbol-value minibuffer-history-variable))))
+      (minibuffer--sort-by-position hist elems)
+    (renz/sort-by-alpha-length elems)))
+
+(defun renz/completion-category ()
+  "Return completion category."
+  (when-let ((window (active-minibuffer-window)))
+    (with-current-buffer (window-buffer window)
+      (completion-metadata-get
+       (completion-metadata (buffer-substring-no-properties
+                             (minibuffer-prompt-end)
+                             (max (minibuffer-prompt-end) (point)))
+                            minibuffer-completion-table
+                            minibuffer-completion-predicate)
+       'category))))
+
+(defun renz/sort-multi-category (elems)
+  "Sort ELEMS per completion category."
+  (pcase (renz/completion-category)
+    ('nil elems) ; no sorting
+    ('kill-ring elems)
+    ('project-file (renz/sort-by-alpha-length elems))
+    (_ (renz/sort-by-history elems))))
+
+(setq completion-auto-help 'always
+      completion-auto-select 'second-tab
+      completions-max-height 10
+      completions-header-format nil
+      completion-show-help nil
+      completions-format 'one-column
+      save-completions-file-name (etc/ "completions")
+      completions-sort #'renz/sort-multi-category)
+
+(add-hook 'completion-list-mode-hook #'truncate-lines-local-mode)
+
+(provide '+completions)
+;;; +completions.el ends here