Technical Glossary

A lightweight, modular mod loader for Minecraft. Kepler initially supports Minecraft 1.21.x with Fabric; builds for 1.20.1, 1.21.1, 1.21.4, 1.21.8, 1.21.11, and 26.3 are in private testing.

A long-standing modding framework for Minecraft Java Edition. In Kepler's roadmap, Forge support is planned for later stages following initial Fabric release support.

An open-source mod loader built for modern Minecraft versions. NeoForge support is planned alongside Forge in later stages of the Kepler roadmap.

An open-source community platform for Minecraft mods and modpacks. Kepler's mod catalog starts with Modrinth; mod search, dependency resolution, version compatibility checks, and SHA-1 verified downloads run through Modrinth.

The runtime environment that executes Minecraft Java Edition. Kepler automatically selects the required Java version from Mojang's version manifest and generates JVM startup flag presets (Balanced, Low hardware, High performance).

The memory pool (-Xms / -Xmx) allocated by the JVM to store world chunks, textures, and mod objects while playing. Kepler analyzes your total system RAM, mod count, and Minecraft version to calculate a recommended heap allocation.

The number of frames rendered to your screen each second. Kepler's in-development FPS/ping HUD module lets you monitor real-time frame rate and server latency on screen.

On-screen status overlays displayed during gameplay. Kepler includes 4 in-game modules in development: FPS/ping HUD, Keystrokes + CPS, Coordinates + direction, and Zoom + Fullbright.

Server-side or client-side protection systems that monitor modified clients and network packets on multiplayer servers. Each server enforces its own allowed mod and client rules; always verify a server's policy before joining.

An isolated game setup containing a specific Minecraft version, mod loader, mod list, JVM settings, screenshots, and worlds in its own directory. Profiles can be duplicated, backed up, or shared via a KEPLER1: share code.

A diagnostic summary generated when the game exits unexpectedly, combining the exit code and recent console (stdout/stderr) lines. Kepler's troubleshooter highlights suspected mod conflicts and automatically masks usernames and file paths when sharing.

The Windows protected your PC prompt shown by Windows for newly released applications that are not yet signed with a digital code-signing certificate. It is not a virus detection and can be bypassed via More info > Run anyway.

A cryptographic checksum used to verify that a downloaded installer is intact and unmodified. You can compute the hash in PowerShell using Get-FileHash and compare it against the checksum published on the download page.

The standard Modrinth modpack archive format. Kepler imports .mrpack files with path traversal protection and SHA-1 verification, and can export your profile along with its settings and worlds.