OptionalnameDisplay name shown in map pickers and campaign screens.
OptionalseedRNG seed used during generation.
OptionalgeneratorStable ID of the generator plugin that produced this map (e.g. 'fbm', 'chunk', 'hand-crafted').
OptionalcreatedISO 8601 creation timestamp. Set automatically by serializeMapJSON when not provided.
OptionalauthorAuthor name or identifier.
OptionaldescriptionShort human-readable description of the map.
OptionalplayerRecommended player count.
OptionaltagsFree-form tags for filtering and categorisation (e.g. ['pvp', 'large', 'island']).
Metadata attached to a saved map. All fields are optional;
createdAtis auto-populated by serializeMapJSON.