SlimefunCore

2870

* Optimized BlockStorage#getRawStorage() with cached immutable snapshots. * Fixed deferredInventories retention during destroy/move operations. * Optimized Cargo Network block access by bypassing unnecessary snapshots. * Reduced cargo routing CPU usage, allocations, and TPS impact. * Fixed auto-report spam from addon lifecycle/linkage errors. Added a 2 reports/server/24h* limit.

Slimefun4Core — Build 2860

New Features

Storage Migration System* — Safer migration and handling of existing Slimefun storage data. Checkpoint System* — Create verified recovery points before important data operations. Report System* — In-game reporting with Discord integration and diagnostic information. Addon Services Upgrade* — Improved addon management, syncing, updates and service handling. Addon GUI* — Manage addons directly through the Slimefun Guide. Automatic Error Detection* — Detect Slimefun/addon errors and generate useful diagnostic reports. Improved Error Handling* — Better error detection, logging and failure handling.

Bug Fixes

* Fixed / working on multiple reported issues and internal errors. * Fixed EXPLOSIVE_BOW entity errors. * Fixed Slimefun storage and backup-related errors. * Fixed Backpack lore NullPointerException issues. * Fixed addon and configuration warnings. * Fixed Discord addon-list formatting issues. * Fixed broken characters appearing in log output. * More bug fixes and internal improvements.

Known Issues

* Addon downloads currently do not verify JAR SHA/signatures. * Discord webhook delivery may fail without confirming successful delivery.

Special Thanks

A special thanks to everyone who helped test, report issues, provide feedback, and follow the development of Slimefun4Core throughout this development cycle. Special thanks to: * m0iy_0 * dido__kf * graxe_1h7 * pasindunayanajith_ * thefryguy_ Your bug reports, testing, feedback, and patience have helped make this release more stable and easier to maintain. Thank you for supporting Slimefun4Core.

Build 2834(fixes)

Configurable Enhanced Furnaces

Server owners can now customize Enhanced Furnace speed,item output multipliers*. * Added furnaces.speeds,furnaces.multipliers: to config.yml. Supports All*

Build 2832

Cargo Manager Revamp

Added Cargo Grid Monitor* GUI * Added real-time network item aggregation Added item search* * Added live per-tick throughput indicators: * ▲ +X/tick Gain * ▼ -X/tick Consume * — 0/tick Stable Added Total Net Throughput* display Added Quick Deposit* in Slot 9 * Left-click: Deposit matching network items * Right-click: Mass-deposit all eligible items * Respects Cargo Output Node whitelists and filters

Enhanced Furnaces

* Added configurable furnace speeds in config.yml(owner side)

SlimefunCore4 — Build 2813

Fixed

🛠️ Recipe Fix*: Fixed an issue with the Crucible recipe pattern not matching correctly in the Enhanced Crafting Table. 🐛 Mechanism Fix*: Fixed a bug where items with incidental metadata (like durability damage) would unexpectedly disappear or be rejected when crafting generic recipe items (meta-mismatch fix). * Fixed Slimefun dusts such as ALUMINUM_DUST incorrectly matching plain vanilla SUGAR. * Prevented registered Slimefun items from being consumed by generic vanilla recipes like Christmas Caramel.

Changelog — Build 2802

Addon Manager — Version- Filtering (fix)

- Addons now auto-filter by server version — only compatible addons show in /sf addon list - Tab-completion only suggests addons available for your server version - /sf addon status shows detected server version + compatible/total counts - Fixed aggressive URL fallback that could load wrong-version addon jars

Console Output Redesign

- Startup - All startup steps - Warning - AddonManager logs

SlimefunCore 4.0 — Minecraft 26.x Release

What's New

Minecraft 26.x Support

SlimefunCore now exclusively targets Minecraft 26.x — the new generation of Minecraft using the modern year.drop.hotfix versioning scheme. - Minecraft 26.1 (March 2026) - Minecraft 26.1.1 / 26.1.2 (April 2026 hotfix) - Minecraft 26.2 "Chaos Cubed" (June 2026 — current stable) - Future-proof — automatically compatible with 26.3+ and beyond via open-ended version matching

Note: Minecraft 1.21.x support has been fully dropped. This is a clean replacement, not multi-version.

---

New Storage & Database System

A completely redesigned storage backend that replaces the legacy flat-file system: - Modern database architecture — scalable and reliable data persistence - Multi-backend support — flexible storage options for servers of all sizes - Improved data integrity — safer block data, player profile, and inventory handling - Seamless migration — existing world data is automatically converted on first load #### New Storage Commands (/sf storage) Administer and monitor the database directly in-game: - /sf storage info — View current provider, connection status, ping, and connection pool size - /sf storage stats — View cache statistics (hit rate, entries, evictions) - /sf storage status — One-line health summary - /sf storage verify — Run a schema integrity check to find missing columns/tables - /sf storage repair — Automatically repair missing schema columns - /sf storage cache clear — Invalidate cached data for online players - /sf storage backup [create|list|restore|delete|verify] — Fully integrated database backup manager ---

Java 25 Support

Built and tested against JDK 25 (Eclipse Adoptium) — fully compatible with the latest Java runtime. ---

Paper 26.x API Modernization

Under-the-hood updates to align with the latest Paper API: - Migrated to Component-based events (Adventure API) - Adopted `DamageSource` builder for modern damage events - Switched to `Registry.BIOME` lookups (replacing deprecated Biome.valueOf) - Updated potion system to `setBasePotionType` (replacing removed PotionData) - Modernized WorldEdit & mcMMO integration hooks ---

Requirements

| Requirement | Version | |---|---| | Minecraft | 26.1+ (any 26.x release) | | Server | Paper 26.x (or forks: Purpur, Folia, etc.) | | Java | 21+ (25 recommended) | ---

Installation

1. Download the JAR from this page 2. Drop it into your server's plugins/ folder 3. Restart your server ---

Setting up the New Database System

By default, Slimefun 4.0 uses the familiar legacy file-based system to ensure backward compatibility and prevent unexpected migrations. To switch to the new database system, follow these steps: 1. Stop your server. 2. Open plugins/Slimefun/database.yml in your text editor. 3. Change the provider setting from legacy to your preferred database type (e.g., sqlite, mysql, mariadb, postgresql). - For sqlite, no additional configuration is needed. - For mysql/mariadb/postgresql, fill in the host, port, username, and password in the same file. 4. Start your server. 5. Slimefun will automatically connect to the database, initialize the tables, and seamlessly migrate your existing world data on the first load! ---

⚠️ Breaking Change: This release does NOT support Minecraft 1.21.x or earlier. If you're running an older server, stay on the previous release.

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. - ![Cargo Grid Monitor (new)](https://cdn.modrinth.com/data/cached_images/9a3991144f875…

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

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.