[verdverm]

This would imply the game state is stored in a centralized app view, at which point the general atproto ethos that you can move your data if an app becomes bad is up to the app.

I believe the viable solution in a rich permission system is one where the user cannot directly modify a record (as defined by a permission schema for a specific app/type) and can only call methods.

[inigyou]

You can easily reproduce a chess board from the moves if you can implement chess.

[cyphar]

Most games are not perfect information games. How would you implement poker?