Org-mode occasionally opens files automatically, for instance, when
inserting or opening ID links, or during certain searches. I need to
determine if a buffer was opened programmatically or manually by the user
within the startup hooks. This distinction is important because, e.g., I
want to automatically preview all LaTeX fragments if the buffer was opened
by the user, but not if it was opened programmatically.

PS: Please use reply-to-all.