Is there a way to reduce the post character limit?

I see the limit is 65k chars which would be difficult to extend, but is there a way to limit this?

Hona Yes you can add a local extender to extend the PostValidator.

This codebase shows how to override the UserValidator: https://github.com/luceos/flarum-extender-examples/blob/master/app/User/EmailDomainsAllowed.php something similar can be made to limit Post length.

PS extending is also possible by manually changing the database table and - again - extending the PostValidator.

If you need more pointers/samples do let us know.

That is great, thank you