Slabbed

One file for Minecraft 1.20.3 and 1.20.4 (Fabric). It carries the full 0.6.1 feature set of the Fabric 1.21.1 line: placement heights are recorded where you aim and kept for good, lowered slabs support the same objects, rails slope to meet their neighbours, fence posts meet a nearby slab ceiling, hung decorations keep their seat.

Needs Fabric API 0.96 or newer (the 1.20.4 builds also run on 1.20.3) and Fabric Loader 0.16 or newer, on Java 17 or newer.

Differences on these versions:

• Placement heights reach other players through Slabbed's own chunk sync message, because these versions' Fabric API cannot sync chunk data on its own. Heights arrive with the chunk and after every change.
• Creative-mode placements record their height like survival ones (these versions skip the "use up the item" step for creative players; the height is recorded at the block-place event instead).
• The decorated-pot insert particle follows the pot's stored height again (the particle exists here).
• Bone-meal sparkles on a lowered block are not yet moved down with the block (the particle helper Slabbed hooks for that does not exist on these versions).

This is an alpha. If anything misbehaves, please open a report at https://github.com/peetsamods/slabbed/issues with your game version, loader and Slabbed version.