Hey there @hugi,
Our custom wizard plugin allows you to create a wide variety of forms within Discourse. You can use the data submitted in a form to create a post within Discourse.
It sounds like the main difference between a custom wizard and what you’re describing is that you’re anticipating user account creation to occur after submission, or at the end of the form, whereas the custom wizard plugin currently requires a user account.
However, you can force a user to complete a wizard immediately after account creation. So one way of implementing this right now would be to put account creation at the start, followed by the collection of further data in the wizard with an associated “create_topic” action.
If you’re sure you want account creation to happen after the form is filled, we could work with you to add that as a feature to the Custom Wizard Plugin.
Angus