Changelog — Mod Creator

v1.1.0

Steam Workshop distribution

Mods packaged with ModKit can now be distributed via Steam Workshop — games built on the ModKit SDK load subscribed Workshop items automatically. Nothing changes in how you package a mod; upload the packaged mod folder's contents as your Workshop item. Configured on the game side — see the Game Dev SDK's Steam Workshop guide

Packaging and cook steps now run without a console window popping up (build processes launch hidden)

Initial release

IModKitMod interface for C++ mod entry points
IModKitGameInterface interface (game-provided API accessible to C++ mods)
FModDescriptor metadata struct
EModPackageFormat (PAK / IoStore)
FModKitContributions contribution types (NewContent, ClassOverrides, CollectionMerges)
EModConflictPolicy (LastWins / Priority / Error)
ModKitPaths utilities for UAT / UBT / UnrealPak path resolution
UE 5.1–5.7 version compatibility macros

Editor toolbar integration: Create Mod, Edit Mod, Package Mod
Create Mod wizard (SModWizardDialog)
- 4 templates: BlueprintOnly, CppModule, MapMod, Full
- Fields: ModId, DisplayName, Author, Version, MinGameVersion, Template, Description, Tags, Thumbnail
- Auto-creates plugin structure and registers in UE Plugin Manager
- Automatic mount point generation (/Game/Mods/{PascalCase}/)
Edit Mod window (SModEditWindow)
- Identity section: ModId, Version, MinGameVersion, MountPoint, Dependencies
- Display section: Description, Tags, Thumbnail with live preview
- Raw JSON editor for ModContributions.json
Package window (SModPackageWindow)
- Mod selector, output directory, platform chooser, compression toggle
- Live build log with real-time streaming
- Progress bar through cook / PAK stages
- Output folder quick-open button
- Validate and Build actions
Two-phase build pipeline:
- Phase 1 (Game Thread): Asset Registry queries, manifest generation
- Phase 2 (Background): UAT cook → UnrealPak → descriptor injection
FModValidator — validation checks:
- Descriptor presence and format
- Hard /Game/ reference detection (3-level severity)
- Blueprint compilation error detection
- Dependency graph checking
FModAssetCollector — plugin-scoped Asset Registry queries
FModProjectWizard — mod project scaffolding with template support

UModKitBuildCommandlet with 4 subcommands:
- new — create mod from CLI
- validate — validate without building (exit code 0/1)
- build — build to PAK (platform, compression, output options)
- list — list .pak files in a game Mods directory
CI/CD ready with structured exit codes