Add +org-export-pre-hook to prepare the buffer before export

init.el

@@ -796,7 +796,8 @@
                                                  org-attach-id-uuid-folder-format)))
 
 (setup ox                               ; org-export
-  (:also-load ox-md)
+  (:also-load +ox
+              ox-md)
   (:option org-export-coding-system 'utf-8-unix
            org-export-headline-levels 8
            org-export-with-drawers nil
@@ -804,8 +805,11 @@
            org-export-with-smart-quotes t
            org-export-with-sub-superscripts t
            org-export-with-toc nil)
+  (with-eval-after-load 'ox
+    (+org-export-pre-hooks-insinuate))
+  (add-hook '+org-export-pre-hook #'+flyspell-correct-buffer)
   (with-eval-after-load 'user-save
-    (advice-add 'org-export-as :before #'user-save-run-hooks)))
+    (add-hook '+org-export-pre-hook #'user-save-run-hooks)))
 
 (setup password-cache
   (:option password-cache t

lisp/+ox.el

@@ -0,0 +1,29 @@
+;;; +ox.el --- org-export helpers -*- lexical-binding: t; -*-
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'ox)
+
+;;; Run hooks before doing any exporting at all
+
+(defcustom +org-export-pre-hook nil
+  "Functions to run /before/ `org-export-as' does anything.
+These will run on the buffer about to be exported, NOT a copy."
+  :type 'hook)
+
+(defun +org-export-pre-run-hooks (&rest _)
+  "Run hooks in `+org-export-pre-hook'."
+  (run-hooks '+org-export-pre-hook))
+
+(defun +org-export-pre-hooks-insinuate ()
+  "Advise `org-export-as' to run `+org-export-pre-hook'."
+  (advice-add 'org-export-as :before #'+org-export-pre-run-hooks))
+
+(defun +org-export-pre-hooks-remove ()
+  "Remove pre-hook advice on `org-export-as'."
+  (advice-remove 'org-export-as #'+org-export-pre-run-hooks))
+
+(provide '+ox)
+;;; +ox.el ends here