API Reference

Types are in CrimsonSettings unless noted. BP = Blueprint-callable.

Authoring & registry

Type	Kind	Description
`UCrimsonSettingsDataAsset`	UDataAsset	Sections of `FCrimsonSettingDescriptor` entries. Per entry: `Type`, `DevName`, `DisplayName`, `Description`, Storage (`bPersistToSharedStore`, `StorageKey`), type fields (range/step/options/action text), Metadata (`PerformanceImpact`, `bRequiresRestart`, `bRequiresConfirmation`, `SettingTags`, `ConflictRules`).
`UCrimsonSettingRegistry`	Abstract, Blueprintable	BP: `Populate From Data Asset`, `K2_BindSetting`, `K2_RegisterVideo/Audio/Input/GameplaySettings`, `Apply Preset`, `Save/Load/Delete Profile`, `Profile Exists`, `Set Preview Mode`. C++: `OnInitialize`, `Initialize`, `RegisterSetting`, `Regenerate`, `FindSettingByDevName`.
`UCrimsonSettingBlueprintLibrary`	UBlueprintFunctionLibrary	Factory nodes: `Create Collection`, `Create Scalar/Discrete Setting`, `Create Action`, `Add Setting To Collection`; `Get Saved Profile Slot Names`.

Settings & value types

Type	Kind	Description
`UCrimsonSetting`	Abstract UObject	Base: `DevName`, `DisplayName`, description, `Tags`, `PerformanceImpact`, restart/confirmation flags, edit conditions, conflict rules.
`UCrimsonSettingValueScalar_BP`	Scalar value	Slider. `OnGetValue`/`OnSetValue`/`OnGetFormattedText`; `BPSourceRange`/`BPSourceStep`/`BPDefaultValue`; optional keyed storage source.
`UCrimsonSettingValueDiscrete_BP`	Discrete value	Options. `OnGetOptions`/`OnGetIndex`/`OnSetIndex`; `BPOptions`/`BPDefaultIndex`; optional keyed storage source.
`UCrimsonSettingValueScalarDynamic` / `...DiscreteDynamic`	C++ value	Data-source-backed (`SetDynamicGetter`/`SetDynamicSetter`). Discrete has `_Bool`/`_Number`/`_Enum`/`_Color`/`_Vector2D` variants.
`UCrimsonSettingAction`	Action	Button; fires a named action tag or custom delegate.
`UCrimsonSettingCollection` / `...Collapsible`	Container	Section grouping; collapsible variant fires `OnExpandedChanged`.
`ECrimsonSettingChangeReason`	Enum	`Change`, `DependencyChanged`, `ResetToDefault`, `RestoreToInitial`.
`ECrimsonSettingPerformanceImpact`	Enum	`None`/`Low`/`Medium`/`High`/`VeryHigh` - drives the row badge.

Storage

Type	Kind	Description
`UCrimsonSettingsShared`	ULocalPlayerSaveGame	Per-player save. Keyed store BP: `Get/Set Float/Int/Bool/String Value`, `Has Keyed Value`. Broadcasts `OnSettingChanged`; `SaveSettings`. Static `LoadOrCreateSettings(LocalPlayer)` (no singleton).
`UCrimsonSharedSettingsSubsystem`	ULocalPlayerSubsystem	Owns/loads the per-player `UCrimsonSettingsShared`; BP `Get Shared Settings`; static `Get(LocalPlayer)`; debounced auto-save on change.
`UCrimsonSettingsLocal`	UGameUserSettings	Machine-local (`GameUserSettings.ini`): display, audio, input, scalability. Static `Get()`; `RunAutoBenchmark(bSaveImmediately)` (the screen's `RunHardwareBenchmark` calls it).
`FCrimsonSettingDataSource`	C++ interface	`Resolve`/`GetValueAsString`/`SetValue` over a `ULocalPlayer` context. Impls: `...LocalSettingDataSourceStatic`, `...SettingDataSourceDynamic`, `FCrimsonKeyedSharedSettingDataSource`.
`UCrimsonSettingsProfile` / `...ProfileIndex`	USaveGame	A `TMap<FName,FString>` snapshot of all settings, and the index of saved slots.
`UCrimsonSettingPreset` / `FCrimsonSettingPresetEntry`	UDataAsset / struct	A named batch of `DevName -> value` overrides applied via `Apply Preset`.

Presentation

Type	Kind	Description
`UCrimsonSettingScreen`	CommonActivatableWidget	Screen base. Override `Create Registry`; requires a `Settings_Panel` bind-widget. `bLivePreview`/`SetLivePreview`, `ApplyChanges`/`CancelChanges`, `RunHardwareBenchmark`. Hooks: `K2_OnRestartRequired`, `K2_OnConfirmationRequired`, `ConfirmSettingChange`/`RevertSettingChange`.
`UCrimsonSettingPanel`	CommonUserWidget	Scrollable list. `Set Search Text`, `Set Tag Filter`, `Clear Tag Filter`.
`UCrimsonSettingListEntry`	Row widget	`K2_OnSettingAssigned`, `K2_OnSettingStateChanged` (dirty/default), `K2_OnConflictWarningChanged`; `IsSettingDirty`, `IsSettingAtDefault`, `GetConflictWarningText`.
`UCrimsonSettingRegistryChangeTracker`	UObject	Drives Apply/Cancel; `AnyDirtySettingRequiresRestart()`.
`FCrimsonSettingConflictRule`	Struct	Watches another setting's value and surfaces an inline warning.
`CrimsonSettingsTags`	Namespace	Built-in category tags (Performance/Visual/Audio/Input/Gameplay/Accessibility) for tag filtering.
`UCrimsonFirstRunWizard` / `UCrimsonFirstRunStep`	Widgets	First-run setup sequence; `HasCompletedSetup()` static; auto-skip when already completed.