Debugify (Forge 1.20.1)

A Forge port of isXander's Debugify for Minecraft 1.20.1. Debugify fixes bugs found on the Mojang bug tracker that Mojang hasn't gotten around to fixing yet — improving gameplay stability, multiplayer fairness, and quality of life without changing core game mechanics.

Features

• 70+ bug fixes from the Mojang bug tracker, organized into two categories:
  • Basic Fixes — Safe, non-intrusive bug fixes that don't alter gameplay balance (e.g. chunk saving, cross-dimensional teleport effects, spectator mode edge cases, RCON formatting, combat tracking).
  • Gameplay Fixes — Fixes that change gameplay mechanics and may provide an advantage in multiplayer. Disabled by default in multiplayer via the "Enable In Multiplayer" toggle.
• Smart conflict detection — Automatically skips fixes that have already been applied by Forge or other mods, preventing crashes and redundant patches. The startup log reports how many fixes were applied, skipped, or failed.
• Works on both sides — Install on a dedicated server to fix server-side bugs for all connected players, and/or on the client to fix client-side rendering, UI, and input bugs. Client and server can run independently without requiring each other.
• In-game configuration screen — A Forge-native config screen accessible from the mod list, letting you toggle individual fixes on or off without editing JSON files.
• Mod compatibility — Detects and avoids conflicts with other mods that fix the same bugs (Carpet, ChunkSavingFix, No Telemetry, flwr-8187, and more).
• Persistent configuration — Settings are saved to config/debugify.json and persist across restarts.

Installation

1. Install Minecraft Forge 47.x for Minecraft 1.20.1.
2. Place the debugify-1.20.1+1.0.jar file in your .minecraft/mods folder (client) or mods/ folder (server).
3. Launch the game. The mod works out of the box with sensible defaults.

Server installation: Drop the jar in your server's mods/ folder. Server-side fixes (32 mixins) apply automatically to all connected players. No client-side installation required for server fixes.

Client installation: Drop the jar in your client's mods/ folder. Client-side fixes (38 mixins) apply on top of vanilla behavior. A config screen is available from the Mods menu.

Requirements

• Minecraft 1.20.1
• Forge 47.x (tested on 47.4.10)
• Java 17

Credits

• Original mod: isXander — Debugify (Fabric, upstream archive/1.20 branch)
• Forge port: MikihinaSann
• Code used under LGPLv3: j-Tai's TieFix, FlashyReese's Sodium Extra
• Code used under Zlib: Ampflower's 2x2 Surrounded Saplings Fix (MC-8187)

License

LGPLv3 — see LICENSE.txt