Street Side Software's Code Spell Checker is a great VSCode extension to tease out typos. I mainly interact with it on a per source file basis where opening the file in the editor triggers the spell check rundown. Is there some way to enact a spell check on an entire directory, maybe even opening all affected files?
This is not possible with the extension. There was an ISSUE 376 on plugin's Github page but it was closed as not planned.
As an alternative, as suggested in the same issue, you can use cspell utility to spell check project directory.