Changelog - #2708

Latest Update

🐛 Fixed

• Fixed a critical backpack item duplication exploit.
• Backpacks now correctly save inventory changes when items are removed.
• Server restarts or shutdowns can no longer cause removed items to reappear inside backpacks.
• Prevented item duplication caused by backpack desynchronization after server reloads.

☁️ CloudConfig

• Updated the plugin to use the new CloudConfig system.
• Removed the outdated CloudConfig implementation.
• Added support for the latest plugin CloudConfig format.
• Manual plugin downloads now work correctly with the updated CloudConfig.

Note: The addon manager sometime unavailable. Plugins can still be downloaded and installed manually without issues.

⚡ Improvements

• Improved overall plugin stability.
• Optimized internal code for better performance.
• Minor code cleanup and maintenance.

❤️ Special Thanks

Special thanks to @graxe_1h7 for reporting the backpack duplication bug and providing detailed reproduction steps, logs, and a video. Your report helped us fix the issue quickly!

SlimefunCore4 Changelog

New Features & Improvements

Cargo Grid Monitor System (new)

• Added a new Cargo Grid Monitor GUI for Cargo Manager.
• Added item categories for easier browsing.
• Added search support for item names, materials, and Slimefun IDs.
• 

Automatic Server Version Detection

• Added automatic Minecraft server version detection.
• Improved compatibility checks for supported server versions.
• Reduced manual setup required for server owners.

Automatic Compatible Slimefun Updates

• Improved Modrinth update checking.
• Added compatible-build selection based on server version.
• Added safer update validation before installing builds.
• Added cache fallback so startup stays safe if the API is unavailable.

Improved Console Logging

• Added clear loading steps for services, items, resources, addons, tasks, and integrations.
• Improved startup diagnostics while keeping warnings/errors safe and visible.

SlimefunCore4 — Changelog

Build 2670 — 2026-05-19

🟢 Addon Manager

• Multi-version addon URLs via addons.<key>.versions per SF4 build tag
• Auto-detects server Minecraft version on startup, shows only compatible addons
• Version-specific cloud-sync URL support via cloud-sync.version-urls
• /addon list shows server version, active build tag, and hidden addon count
• Old single-URL config format still works — automatically upgraded on load
• Remote sync no longer overwrites local enabled / download toggles

🔵 Safety

• Addon JARs only deleted when explicitly disabled or removed via command
• Deletion queue, addon logs, and config backups kept across restarts

🟡 World Backup

• New WorldBackupService — backs up world, world_nether, world_the_end on shutdown
• Skips live lock files, checks disk space before starting, auto-purges old backups
• Configurable via slimefun.world-backup in config.yml

🔶 Dough Bridge Layer

• Added io.github.thebusybiscuit.slimefun4.libraries.bridge — 13 wrapper classes (SF4Items, SF4Colors, SF4ItemUtils, SF4InvUtils, SF4Patterns, SF4BlockPos, SF4DataAPI, SF4ChatInput, SF4Vein, SF4PlayerUtils, SF4TaskQueue, SF4Config, SF4Collections)
• 144 internal call sites migrated to bridge — future Dough updates touch 13 files, not hundreds
• Public API and storage types kept as direct Dough imports for addon compatibility
• No gameplay or behaviour changes

Quick fix sha256 wrong

  Fail all 3 attempts
  after Attempt 1 fails
  attempt 2 skips SHA, succeeds — logs real hash

Addon Manager

Build 2647

What's New

• Dynamic addon list showing cloud-managed and manually installed addons
• Status overview with managed, loaded, and unmanaged addon counts
• Smarter GitHub jar selection — matches by addon name first
• Managed addon detection now reads directly from the jar's plugin.yml
• Fallback flags for remote sync are now fully respected

New Commands

• /sf addon list — lists all addons (managed + installed)
• /sf addon status — shows addon counts and sync state
• /sf addon sync — manually trigger a cloud config sync
• /sf addon enable <name> — enable a managed addon
• /sf addon disable <name> — disable a managed addon
• /sf addon update <name> — update a specific addon
• /sf addon download <name> — download a managed addon
• /sf addon remove <name> — remove a managed addon

Changelog

• improve performance
• fixed critical bug

🚀 SlimefunCore4 v2621

A stability-focused update with major storage improvements, Android system upgrades, and multiple critical fixes.

✨ Highlights

🧠 New Storage System (Major Upgrade)

• Introduced a modular storage architecture
• Added SQLite backend support
• Implemented async save queue & caching
• Added data consistency checker & migration system
• Improved overall performance and reliability

🔒 Storage Improvements

• Moved storage logic away from risky bootstrap path

• Added atomic file saving (prevents corruption)

• Fixed research data issues

• Added validation systems:

  • Research validation
  • Backpack size checks

• Improved safety:

  • Null-safe item loading
  • Optional-based lookups
  • Immutable data views
  • Dirty flag tracking per section

🤖 Android System Upgrades

• Added bad-data recovery system

• New Android GUI status panel:

  • Running / Paused / Error states
  • Step progress tracking
  • Current command display
  • Fuel buffer info
  • Facing direction
  • Last error reporting

📜 Script System Fixes

• Fixed script rating system
• Improved script sorting
• Fixed script browser page issues

🧩 Developer Changes

• Added new storage components:

  • StorageException
  • StorageSaveQueue
  • StorageCache
  • StorageFactory
  • StorageConsistencyChecker
  • StorageMigrator
  • SQLiteStorage

⚠️ Notes

• This is an experimental but stable build
• Storage system is now future-ready and extensible
• Recommended to backup data before upgrading

💬 This update focuses on making your server safer, faster, and more scalable while preparing for future features.

Slimefun 4.9-UNOFFICIAL

Modified Version

Slimefun is a plugin which turns your Minecraft server into a modpack without installing mods. It adds a huge amount of content including advanced technology, powerful magic, machines, and full automation systems.

This is an unofficial modified version of the original project, maintained and updated by R2Ksanu.

** Original Repository: https://github.com/Slimefun/Slimefun4**

Status Update

• Original version: 1.19.4
• Updated to: 1.21.11
• Compatibility: :white_check_mark: Working
• Status: :test_tube: Currently under testing
• Tested on: Purpur 1.21.11 (Java 21)

This build is still under testing and may contain bugs. Feedback and bug reports are highly appreciated!

Future Update

Upcoming Slimefun community addons will also be updated for Minecraft 1.21.11 to work together with this main core build.

The goal is to keep the wider Slimefun addon ecosystem usable on modern Purpur/Paper 1.21.11 servers.

:package: Updated Addons

URL :

https://github.com/rutwok-labs/SF4-Addons

Download

🔗 Link : Slimefun v4.9-UNOFFICIAL.jar

Note: This is an unofficial fork. Always test on a backup server before using on production.

🖼️ Screenshots

(Reused from the original project – showcasing the power of Slimefun)

Reactors & Electricity	Awesome Factories	Magic & Altars

✨ What is Slimefun?

Slimefun adds:

• Advanced technology systems
• Magical items and crafting
• Machines and automation
• Over 500 custom items

The original project started in 2013 and has grown into a large community project with hundreds of contributors.

This unofficial version keeps the spirit alive while bringing full support for the latest Minecraft 1.21.11!

🧭 Quick Navigation

• 💾 Download
• 🖼️ Screenshots
• 🐞 Bug Reports & Feedback
• 📖 Original Wiki
• ❤️ Original Project

⚠️ Important Disclaimer

This is an unofficial fork and is not affiliated with the original Slimefun developers or team.

• All credits go to the original Slimefun Team.
• This project follows the GNU GPLv3 License.
• You are allowed to modify and share it, but you must give proper credit and keep the same license.

Original Project
Creator & Builder: TheBusyBiscuit

TheBusyBiscuit · he/him
Original Project Team: Slimefun Team
Repository: https://github.com/Slimefun/Slimefun4

🤝🏻 Credits

• Original Project Creator: TheBusyBiscuit
• Original Project Team: Slimefun Team
• Modified & Updated by: R2Ksanu
• Screenshots: Courtesy of the original Slimefun community

📄 License

This project follows the GNU GPLv3 License.
See LICENSE for details.

Thank you for using Slimefun 4.9-UNOFFICIAL!
Enjoy your modpack-like experience on the latest Minecraft version! :tada:

Made with ❤️ for the Minecraft community