Minecraft wiki entry for Development_versions, associated text: Added new climbable block tag.
Includes ladders, vines, scaffolding, and weeping vines.
Used in mob pathfinding and to determine what blocks the player can climb.
Added new impact_projectiles entity tag.
Includes the arrows tag, snowballs, fireballs, small fireballs, eggs, tridents, dragon fireballs, and wither skulls.
Used to determine what entities will break chorus fruit when hit.