
SlimefunCore
Custom unofficial Slimefun core build for Paper/Purpur 1.21.11 with Java 21 support, compatibility fixes, modern startup support, and stable loading for updated SF4 addons.
SlimefunCore 4.0-UNOFFICIAL
release8 мая 2026 г.Quick fix sha256 wrong
Fail all 3 attempts after Attempt 1 fails attempt 2 skips SHA, succeeds — logs real hash
SlimefunCore 4.0-UNOFFICIAL
alpha6 мая 2026 г.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
SlimefunCore 4.0-UNOFFICIAL
alpha28 апреля 2026 г.🚀 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.
SlimefunCore 4.0-UNOFFICIAL
alpha23 апреля 2026 г.Нет описания изменений
SlimefunCoreV4
beta5 апреля 2026 г.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
| Addon | Status | Notes |
|---|---|---|
| Community Addons | ⏳__ Upcoming | Planned compatibility updates for 1.21.11 |
| Main Slimefun Core | ✅ Updated | Working on Purpur/Paper 1.21.11 |
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
⚠️ 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



