Runtime Package Toolkit

Runtime Package Toolkit (RuntimePakToolkit) is an Unreal Engine 5.5+ plugin for creating and loading cooked runtime content packages.

It has two separate modules:

• ContentMountRuntime: packaged-build runtime mounting, inspection, AssetRegistry scanning, asset/class loading, and optional HTTP download.
• ContentMountEditor: editor-side package builder for creating classic .pak files from already-cooked content.

Features

• Mount and unmount cooked .pak files at runtime.
• Register and unregister logical Unreal mount points.
• Inspect pak files and list contained files.
• Load mounted UObject assets and Blueprint-generated classes.
• Scan mounted content roots with AssetRegistry.
• Download pak files asynchronously with optional SHA1 verification.
• Build classic .pak packages from cooked files in a native editor window.
• Generate manifests that the runtime module can read to mount editor-created packages safely.
• Warn honestly about IoStore limitations instead of faking .utoc/.ucas support.

Quick Start

1. Install the plugin under your project Plugins/ directory.
2. Enable Runtime Package Toolkit in Unreal Editor.
3. Cook your project for the target platform.
4. Open Tools > Runtime Package Toolkit > Content Package Builder.
5. Build a classic .pak package from cooked assets or cooked folders.
6. At runtime, read the generated manifest with LoadMountOptionsFromPackageManifest.
7. Mount the pak, scan the root, then load assets/classes by soft path.

Important Runtime Rules

• Runtime package loading is for cooked packaged builds.
• Assets must be cooked for the same target platform as the host build.
• Engine, project, plugin, class, serialization, signing, encryption, and container settings must match the host build.
• Editor runtime loading is intentionally blocked by default because editor asset loading does not prove packaged runtime compatibility.
• IoStore is a different container system. Direct IoStore container generation is not implemented by this plugin.

Documentation

• Setup
• Editor Package Builder
• Runtime Mounting
• Blueprint Usage
• C++ API
• Pak Creation
• IoStore
• Security
• Troubleshooting
• Limitations

Repository

https://github.com/AldertLake/PakToolkit