Hotbar Keeper

pins a hotbar slot to whatever's in it and tops it up from your main inventory when the stack drops below max. wrote it because i kept running out of blocks mid-build.

keys: You must configure them each pinned slot gets a colored outline on the HUD. color is random per pin.

the refill engine matches on 1.21 data components, so an enchanted sword and a plain sword aren't treated as the same item — it won't swap your sharpness V sword for a regular one behind your back. transfers go through the normal pickup-click-return flow you'd do by hand, rate-limited to once every 3 ticks so the server doesn't get spammed.

works on 1.21.11, fabric, java 21. client-side only, fine on servers that don't have it but don't ues with anticheat server.