ChestShare+

Summary

Per-player instanced loot for world-generated containers — 100% server-side.

Description

Every player gets the dungeon chest. Not just the first one.

On a survival server, the first player to find a structure empties it. Everyone after them explores a looted world. ChestShare+ gives each player their own instance of every world-generated container — same seed, same loot, nobody left out.

And it's 100% server-side: drop one jar in mods/, done. No client install, works with vanilla clients, launcher-locked modpack players, and cracked-open modpacks alike.

This is a fork of ChestShare by Calamech. All credit for the original concept, design, and implementation goes to Calamech. This fork adds:

• Modded/reflective container support — Sophisticated Storage and CobbleFurnies containers are captured and shared the same way vanilla chests, barrels, shulker boxes, and chest minecarts are. Storage mods that build on vanilla's own container system (e.g. Carved Wood's chests and barrels) are covered too, with no special-casing needed.
• Asynchronous, cancellable import — large imports no longer block the server. /chestshare import status and /chestshare import cancel let you monitor and stop a running import.
• Passive world-gen safety — installing on an existing world never sweeps up a player's own already-placed modded storage; only genuinely freshly-generated chunks are eligible for modded-container auto-capture.
• Structure fingerprint registry — at server start, every registered structure template (vanilla, datapack, and mod-provided) is scanned and its baked-in storage containers are recorded. This lets ChestShare+ recognize and share Sophisticated Storage / CobbleFurnies containers — and loot-table containers like Cobblemon's Gilded Chest — that came from a structure, even on a chunk that existed before the mod was installed.
• /chestshare adopt-structure <pos> — adopts every storage container in the structure at <pos> and restores each one's original loot from the template, whatever it currently holds. Covers containers that were already looted, emptied, or previously shared with the wrong contents.
• /chestshare toggle restore-empty-structures — optional, off by default. When enabled, an empty container sitting at a known structure storage position is automatically refilled and made a shared container the next time its chunk loads — including an already-explored chunk being revisited — without needing adopt-structure run by hand.

Commands (op level 2)

Good to know

• Fabric, Minecraft 1.21.1, Java 21. Requires Fabric API. Server-side only (also works in singleplayer/LAN).
• Chunks generated before install: unopened vanilla containers still convert automatically on first open (their loot table is intact); already-looted ones can be recovered with /chestshare adopt-structure if they came from a registered structure, or with the export/import recovery workflow otherwise (a second copy of the world, same seed and mods, to pre-generate and capture the original loot from).
• export only ever writes containers this mod has already registered — a chunk merely being loaded doesn't register anything by itself. A fresh chunk-generation event, a player opening the container, or /chestshare adopt-structure does.
• Container support covers: vanilla chests, barrels, shulker boxes, and chest minecarts; any modded block entity that implements vanilla's Container interface — this covers a lot of storage mods for free, since many decorative/simple storage mods build directly on vanilla's own container implementation (confirmed by testing with Carved Wood's chests and barrels; Cobblemon's Gilded Chest also appears to be Container-based, based on how other mods treat it, though it hasn't been directly tested here); and, by name, Sophisticated Storage and CobbleFurnies specifically, which don't implement Container and are supported via reflection instead. A mod whose storage is fully custom — neither Container-based nor one of those two named integrations — isn't covered by passive discovery, though /chestshare adopt-structure can still restore it if it came from a registered structure template.
• Verified against the official COBBLEVERSE modpack's world-generated storage: Sophisticated Storage, Sophisticated Core, and CobbleFurnies are supported by name, and Carved Wood is covered generically via Container.

License

MIT — original work Copyright (c) 2026 Calamech. Source code.