Decided. A one-page brief comes first, then the build.
Signing in today is by an emailed code or link. It would be easier to use the passkey already on your phone or laptop, or a text to your phone number. This is planned for the next StoryFlow app rather than the current studio.
Whoever brings a script in owns the project for good. It would help to offer ownership to a co-writer, who accepts it, with both told. And when an owner cannot be reached, the writer named as author could ask to take it over.
When a production sends the script out, each person gets their own copy, with their name across the pages and a code at the foot. Scanning the code always opens the latest circulated version, so nobody works from old pages, and you can see which version each person has.
On the free plan, you can choose to put a small "Made with StoryFlow" mark at the foot of the pages you send out, with a code a reader can scan to see your writer's page. It is off unless you turn it on, and it never covers your words.