Bulk Villager Trading — NeoForge 1.21.1

Trade your whole stock with a merchant in a single shift-click.

What it does (and doesn't)

This one's counter-intuitive, so worth stating: vanilla already chains trades when you shift-click a merchant's result slot (AbstractContainerMenu.doClick re-runs quickMoveStack in a loop). But it only consumes what you manually placed in the 2 payment slots (~2 stacks), and never refills those slots from the rest of your inventory.

This mod adds exactly one thing: it refills the payment slots from your inventory before each trade. Result: one shift-click trades your whole relevant stock instead of stopping after 2 stacks. It's a quality-of-life refinement (trading halls, converting resources to emeralds), not a missing feature.

It respects villager restock limits — when a trade runs out of stock, bulk trading stops, exactly like vanilla. No stock bypass, no duping.

Implementation: a single Mixin (@Inject at the HEAD of quickMoveStack, result slot) that calls the vanilla moveFromInventoryToPaymentSlot, then lets vanilla do the trade. No duplicated trade logic. Server-side, no dependencies.

Config (server)	Default	Effect
enabled	true	Toggles the refill. false = strict vanilla behavior.

Build & run

Requires JDK 21. Gradle wrapper included.

cd bulk-trade
./gradlew build          # -> build/libs/bulktrade-0.1.0.jar
./gradlew runClient      # test client with the mod loaded

The first build decompiles Minecraft (slow, then cached); later builds take seconds. In IntelliJ: "Open" the bulk-trade folder, then run the runClient run configuration.

In-game test

1. Creative world, a villager with a profession (or a wandering trader).
2. Select a trade and place payment as usual (clicking the trade auto-fills the slots).
3. Shift-click the result slot.
4. Expected: the trade repeats until your payment stock is drained (not just the 2 slots), and stops when the villager runs out of stock. Compare enabled=false (stops after ~2 stacks) vs true.

Leftover payment in the slots is returned to your inventory when the menu closes (MerchantMenu.removed), so no items are lost.

Loader & versions

• Loader: NeoForge
• Minecraft: 1.21.1
• Runs on any NeoForge 21.1.x (see versionRange in neoforge.mods.toml).

Support

☕ If this mod is useful to you: buy me a coffee on Ko-fi

License

MIT