RSJFW Reborn

Roblox Studio Just Fucking Works. REBORN!

The high-performance, native C++20 Linux environment for Roblox Studio. Built to obliterate Python/Shell/Go wrappers with raw speed and engineering precision.

RSJFW is a clean-room engineered solution designed for maximum performance and stability. It's an engine, not a simple command runner.

Why RSJFW?

Legacy wrappers are slow, bloated, and prone to breakage. RSJFW is built for the absolute best experience.

Feature	Legacy Wrappers	RSJFW
Core Architecture	Python / Bash Glue	Native C++20 Engine
WebView2	Barely working	Native Support (tested best with Proton)
Startup Latency	2-5 Seconds	< 200ms
Protocol Handling	Fragile, often breaks	Native Socket/Pipe Interop
Diagnostics	"Check the logs"	Self-Healing Orchestrator
Asset Control	External downloads	Precise Binary Selection
GPU Management	Manual env vars	Auto-Discovery & Injection

Features

• Zero-Latency UI: Built with Dear ImGui and GLFW for an instant, responsive dashboard.
• Credential Management: Real-time account tracking and automated session syncing between runners.
• UMU Runner: First-class support for the Unified Linux Wine Runner (umu-run).
• Vulkan Layer: Custom Vulkan layer for enhanced stability, enforcing triple buffering and fixing swapchain recreation issues.
• Modular Runners: Support for Steam Proton, GE-Proton, and System Wine.
• Auto-Discovery: Automatically finds your Steam Proton installations and GPU hardware.
• Live Diagnostics: A real-time health grid that detects and fixes issues with dependencies, desktop entries, and protocol handlers.

Usage

1. Registration (First Run)

After compiling, register RSJFW with your desktop environment to handle roblox-studio:// links.

./rsjfw register

2. Configuration

Open the high-fidelity dashboard to configure runners, DXVK, and FFlags.

./rsjfw config

3. Launching

RSJFW automatically handles browser protocols. You can also launch it manually:

./rsjfw launch

Recommended Workflow

For the best experience, we recommend the following workflow:

1. Login with Proton: Use the Proton runner to log in to your Roblox account initially. The embedded WebView2 browser works most reliably under Proton for authentication flows.
2. Switch Runner: Once logged in, switch to UMU or Wine for day-to-day development. Your credentials will be automatically synced.

Build from Source

Dependencies

• CMake 3.14+
• C++20 Compiler (GCC 10+ / Clang 10+)
• Development headers: libcurl, libarchive, glfw3, gtk3 (for file dialogs), opengl

Compilation

mkdir build && cd build
cmake ..
make -j$(nproc)

License

MIT License. See LICENSE for details.