API Reference

Messaging

Type / function	Notes
`UCrimsonMessageSubsystem::Get(WorldContext)`	Game instance subsystem accessor
`BroadcastMessage<T>(Channel, Message)`	C++ typed broadcast
`BroadcastMessageRaw(Channel, StructType, Bytes)`	C++ broadcast of a struct known only by its `UScriptStruct`
`Broadcast Message` / `BroadcastInstancedMessage`	Blueprint broadcast (wildcard struct / `FInstancedStruct`)
`RegisterListener<T>(Channel, Callback, MatchType)`	Returns `FCrimsonMessageListenerHandle`; member-function overloads are weak-object safe
`UnregisterListener(Handle)` / `Handle.Unregister()`	Stop listening
`ECrimsonMessageMatch`	`ExactMatch` or `PartialMatch`
`UCrimsonAsyncAction_ListenForMessage`	Blueprint Listen For Crimson Messages node; `OnMessageReceived`, `GetPayload`

Player classes

Type	Notes
`UCrimsonCommonGameInstance`	Abstract game instance base; local player added/removed events
`UCrimsonCommonLocalPlayer`	`CallAndRegister_OnPlayerControllerSet`, `CallAndRegister_OnPlayerStateSet`, `CallAndRegister_OnPlayerPawnSet`
`ACrimsonCommonPlayerController`	Modular controller that raises the local player delegates
`UCrimsonSessionSubsystem`	Host, find, join sessions; `UCrimsonSession_HostSessionRequest`, `UCrimsonSession_SearchResult`
`UCrimsonUserSubsystem`	Login, privileges, online context; `UCrimsonUserInfo`, `FCrimsonUserInitializeParams`

Modular actors

Type	Base
`ACrimsonModularCharacter`	`ACharacter`
`ACrimsonModularPawn`	`APawn`
`ACrimsonModularPlayerController`	`APlayerController`
`ACrimsonModularPlayerState`	`APlayerState`
`ACrimsonModularGameModeBase` / `ACrimsonModularGameMode`	`AGameModeBase` / `AGameMode`
`ACrimsonModularGameStateBase` / `ACrimsonModularGameState`	`AGameStateBase` / `AGameState`
`ACrimsonModularAIController`	`AAIController`

Editor utilities

Type / command	Notes
`UCrimsonEditorUtilitiesSettings`	Project Settings page: `bEnableCommonMaps`, `CommonEditorMaps`
`UCrimsonWidgetAuthoringLibrary`	Editor-only Blueprint library: `RemoveWidgetAnimation`, `PruneDeadAnimationBindings`, `GetWidgetAnimationNames`
`Crimson.DevTools.Gallery`	Opens the DevTools Gallery
`ICrimsonWikiAction`, `FCrimsonWikiActionRegistry`	Register actions for wiki `button` blocks