AdventureSettings

Legacy permissions packet: adventure flags, command permission level, action permissions and permission level for one player.

adventure-settings.bin

struct AdventureSettings {
  varuint32                                    Flags;
  varuint32                                    CommandPermissionLevel;
  varuint32                                    ActionPermissions;
  varuint32                                    PermissionLevel;
  varuint32                                    CustomStoredPermissions;
  varint64                                     PlayerUniqueID;
}

Structure

Field	Type	Description
Flags	varuint32	Adventure flags: world immutable, no PvM, no MVP, show name tags, auto jump, allow flight, no clip, world builder, flying, muted.
Command Permission Level	varuint32	Command permission level (visitor..custom).
Action Permissions	varuint32	Action flags: mine, doors and switches, open containers, attack players, attack mobs, operator, teleport, build.
Permission Level	varuint32	0 Visitor, 1 Member, 2 Operator, 3 Custom.
Custom Stored Permissions	varuint32	Custom permission bitset.
Player Unique ID	varint64	Entity unique ID of the target player.

Notes

Still exchanged for backwards compatibility; the modern flow is RequestPermissions + UpdateAbilities + UpdateAdventureSettings.
Clients send it when toggling settings; servers must verify the claims.