Changelog — Game Dev SDK

v1.1.0

Mods from Steam Workshop & external sources

SteamWorkshopAppId runtime setting — auto-loads a game's Steam Workshop content. The Workshop path is resolved at runtime from the game's own install location, so it is correct on every player's machine with no path configuration. See Steam Workshop & External Sources
ExtraModPaths runtime setting — scan additional mod directories (absolute, or relative to the game folder)
Mod scanning is now recursive — mods load at any folder depth, matching the nested layout of Steam Workshop items
FModDescriptor.SourceDirectory — records the folder each mod was loaded from, so thumbnails and enable/disable resolve correctly for mods outside the Mods folder

The ModKit Runtime and ModKit SDK settings pages now reliably appear under Project Settings → Plugins on all engine versions, and the toolbar Settings button opens the ModKit page directly

Initial release

IModKitMod interface for C++ mods
IModKitGameInterface interface for game-side API exposure
FModDescriptor metadata struct (ModId, Version, Author, Dependencies, Tags, Thumbnail, timestamps)
EModPackageFormat enum (PAK / IoStore)
FModKitContributions contribution types (NewContent, ClassOverrides, CollectionMerges)
EModConflictPolicy (LastWins / Priority / Error)
ModKitPaths utilities for locating UAT, UBT, UnrealPak
UE 5.1–5.7 version compatibility macros

UModLoaderSubsystem — GameInstance subsystem with full Blueprint API
- StartLoadMods() — manual mod loading trigger
- OnModLoaded / OnModFailed / OnAllModsLoaded delegates
- GetLoadedMods() / IsModLoaded() / GetDisabledMods() / GetFailedMods()
- SetModEnabled() / IsModEnabled() — persistent mod enable/disable
- SearchMods() — case-insensitive search
- GetModsByTag() / GetAllAvailableTags() — tag filtering
- QueryModAssets() — Asset Registry queries with filters
- LoadModThumbnail() — thumbnail loading with transient caching
- ReloadMod() — hot-reload for Editor iteration
FModLoader — full scan, validate, topological sort, mount pipeline
FPakMounter — PAK mounting at priority 100; IoStore support (UE 5.4+)
FModRegistry — thread-safe mod registry
UModContentRegistry — contributions system
- Class override resolution with SpawnResolvedActor()
- DataTable row-by-row merging with path mirroring
- Asset override auto-detection
Security: native code (.dll) rejection — always active
PAK layouts: flat and subfolder
Dependency graph with circular detection

Editor toolbar integration with ModKit dropdown
Mod creation wizard (SModWizardDialog)
- 4 templates: BlueprintOnly, CppModule, MapMod, Full
- Auto-registers plugin in Editor
Mod edit window (SModEditWindow) — metadata and contributions editor
Mod package window (SModPackageWindow) — build UI with live log
Two-phase build pipeline:
- Phase 1 (Game Thread): CollectAndValidate() via Asset Registry
- Phase 2 (Background): Cook → PAK → inject descriptor
FModValidator — hard ref detection, Blueprint compile check, descriptor validation
FModAssetCollector — plugin-scoped Asset Registry queries
FModProjectWizard — mod project scaffolding
C++ SDK Generator (FModKitCppGenerator) — Blueprint API → C++ headers
UModKitSettings — Project Settings integration

UModKitBuildCommandlet — headless build commandlet
- new — create mod project
- validate — validate without building
- build — build to PAK
- list — list mods in a game directory