Try to produce useful interfaces and data structures, even internally. When data is stored make it easy to verify that it's in a recognized, expected, format; possibly with a version scheme that can be extended later.
Historically successful protocols often have a basic feature level and later extend it with features that are not required (at the time) but improve functionality. All the more so when users with accounts need more features than federated (not authenticated) users from other platforms.
Historically successful protocols often have a basic feature level and later extend it with features that are not required (at the time) but improve functionality. All the more so when users with accounts need more features than federated (not authenticated) users from other platforms.