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SlashLootr

Per-player loot for naturally-generated chests, barrels, shulker boxes, and minecarts — server-side only, requires no client mod.

File Details
DownloadInstall

slashlootr-0.1.0+mc1.21.1.jar

Byslashdaemon2026
  • R
  • May 24, 2026
  • 28.71 KB
  • 7
  • 1.21.1
  • Fabric

File Name

slashlootr-0.1.0+mc1.21.1.jar

Supported Versions

  • 1.21.1

Curse Maven Snippet

Fabric

modImplementation "curse.maven:slashlootr-1552991:8140709"
Curse Maven does not yet support mods that have disabled 3rd party sharing

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0.1.0 — 2026-05-24

Initial implementation. Eight Minecraft version bands shipping out of the gate.

Added

Core mechanic (all bands) - Server-side per-player instanced loot for naturally-generated containers. Each player who opens a chest with a LootTable NBT tag receives a freshly-rolled personal inventory; one player's looting leaves the chest full for everyone else. - Hook 1: mixin on the vanilla loot-roll method cancels the "lazy bake into the world container" pass — the chest's LootTable and LootTableSeed NBT tags stay intact across server restarts. - Hook 2: Fabric UseBlockCallback + UseEntityCallback intercept right-click before vanilla menu-creation runs, build (or load) a per-player SimpleContainer, and open a vanilla ChestMenu / ShulkerBoxMenu / HopperMenu backed by it. - Per-player loot seed: containerSeed XOR player.uuid.msb XOR rotL(player.uuid.lsb, 17) — same player + same container = same loot across re-opens.

Container coverage - Chests, trapped chests, barrels, shulker boxes (block containers). - Chest minecarts, hopper minecarts, chest boats (entity containers). - Double chests: each half tracks its own per-player loot independently; opening either half presents a combined 54-slot CompoundContainer view, canonicalized by lower-packed BlockPos.

Persistence - world/<dimension>/data/slashlootr.dat. Two top-level maps: blocks (keyed by packed BlockPos) and entities (keyed by entity UUID). Survives server restart. - ContainerListener on every personal SimpleContainer marks the SavedData dirty on any slot change.

Admin & config - /slashlootr forget here|at <pos>|player <name> (op-only). - config/slashlootr.json with dimensionBlocklist, lootTableBlocklist, playOpenCloseSounds.

Multi-version build infrastructure - Multi-project Gradle build patterned on mindfulent/TipSign. common/ holds version-agnostic logic (just SeedDeriver); each band under versions/<MC>/ is a self-contained subproject. - ./gradlew buildAll produces 8 JARs in build/release/.

Per-band specifics

See docs/ARCHITECTURE.md § Per-band specifics for full file-level diffs.

Band MC versions Loom Java Notable rewrites vs. 1.21.1 baseline
A 1.20.1 1.11.x 17 RandomizableContainer interface didn't exist — mixin targets RandomizableContainerBlockEntity class. ContainerEntity interface didn't exist — split into separate MixinAbstractMinecartContainer + MixinChestBoat. Loot-table fields are private — added three @Accessor mixins (AccessorRandomizableContainerBlockEntity, AccessorAbstractMinecartContainer, AccessorChestBoat). ResourceLocation everywhere (no ResourceKey<LootTable>). SavedData.computeIfAbsent(loader, factory, id) 3-arg form, save(CompoundTag) without HolderLookup.Provider. SimpleContainer.fromTag/createTag without HolderLookup.Provider.
B 1.20.5 1.11.x 21 Same source as Band C — compiles clean because 1.20.5 introduced RandomizableContainer interface, ContainerEntity interface, ResourceKey<LootTable>, and HolderLookup.Provider parameters.
C 1.21, 1.21.1 1.11.x 21 The baseline. 1.21 shares 1.21.1's source tree via sourceSets.main.java.srcDirs.
D 1.21.2, 1.21.4 1.11.x 21 ContainerEntity.getLootTable() → getContainerLootTable() (and the seed equivalent). Two-method rename in EntityInteractionHandler + MixinContainerEntity.
E 1.21.6, 1.21.9 1.11.x 21 SavedData.Factory<T> removed; SavedDataType<T> + Codec<T> is the only registration path. Rewrote SlashLootrState with RecordCodecBuilder and a sparse SlotItem(int slot, ItemStack item) codec (encodes only non-empty slots). PlayerLootEntry lost its NBT methods in favor of a codec helper.

Build infrastructure

  • Loom bumped from 1.9 → 1.10 → 1.11 as needed for newer MC versions.
  • Fabric API versions per band cross-referenced against mindfulent/TipSign and Modrinth's Fabric API release list.

Not yet implemented

  • Chest lid animation (open sound plays via OpenSoundFx, but the lid stays closed because we bypass ContainerOpenersCounter).
  • /slashlootr forget all — currently emits an error suggesting the admin stop the server and delete slashlootr.dat.
  • Decorated pots and suspicious sand/gravel (different open mechanic — brushing — would need separate hooks).
  • Looted-state visual indicator (Lootr's gold→blue color change would require a companion client mod).
  • Loot decay / re-roll (each player's loot is currently permanent by design).
  • Runtime verification on LocalServer or a production deploy — code is compile-clean only.