SJMC Launcher

SJMC Launcher is an open-source, cross-platform launcher designed for managing Minecraft game instances and resources. It is compatible with Windows 10/11, macOS, and Linux, offering support for users who require a unified environment to organize multiple game directories and instances. The launcher centralizes the management of various resources, including saved games, mods, resource packs, shader packs, screenshots, and settings, streamlining the process for players who maintain different configurations or versions.

A key feature of SJMC Launcher is its efficient resource management, allowing users to handle all instance-related assets in one place. The launcher supports convenient downloading of game clients, mod loaders, assorted game resources, and modpacks from sources such as CurseForge and Modrinth. This integration reduces the complexity of sourcing and installing content, catering to players who frequently customize or update their Minecraft experience.

The launcher includes a multi-account system with built-in Microsoft login and support for third-party authentication servers. It is compatible with the OAuth login flow proposal for Yggdrasil Connect, offering flexibility for users who manage multiple accounts or require alternative authentication methods. SJMC Launcher also facilitates collaboration with external services through deep linking and MCP service integration, enabling interaction with web pages, programs, and agent services for added convenience and automation.

Extensibility is another focus, with an open extension system that allows developers to create and add new features to the launcher. This makes it suitable for both regular players seeking ease of use and developers interested in expanding its capabilities. SJMC Launcher is not an official product of Minecraft, Mojang, or Microsoft, nor is it affiliated with them.