Sophisticated Backpacks: Advanced Crafting Upgrade

A refill-style crafting upgrade that draws on the items kept inside a backpack, extended so it also reaches into nested backpacks. Materials stored in a backpack placed within another backpack can be used directly in a recipe grid. The mod is built for the nested storage behavior of the existing system and extends it rather than acting as a separate crafting mechanic.

An optional toggle limits the advanced upgrade to the backpack slots memorized with the slot memory feature, which helps when only some nested containers, a materials backpack for example, should feed a craft. Just Enough Items can transfer recipes into the upgrade when it is installed.

The mod requires Sophisticated Backpacks and Sophisticated Core, runs on NeoForge for Minecraft 1.21.1, and needs to be installed on both the client and the server. Files for 1.21.1 were first published on 2026-06-30, and the latest file, 1.0.2, dates from 2026-07-16. The code is not open source; the source and issue tracker are public, and the mod is licensed as All rights reserved.