1.19 #92 adds API to add custom chat completions, useful for adding stuff like emoji completions! #95 adds new collision APIs to check for in a world, as well as whether an entity would collide with boats, the worldborder, or any block at another location #ThisWeekInPaper

Build #310 fixes a bug where you'd get kicked opening a custom inventory when clicking on a specific recipe in the recipe book. Cauldrons filled with powder snow will now correctly convert into water when extinguishing an entity, starting with build #311 #ThisWeekInPaper

Upstream added some more APIs to Vexes, which we merged with build #315. #ThisWeekInPaper (Tell us if you like those short summaries of what happened over the past few days, if you like them we will continue!)

Starting with #293 you can now easily grab the original damage of an item before reduction with PlayerItemDamageEvent#getOriginalDamage. Build #296 improves the update folder behavior to use plugin names instead of file names #ThisWeekInPaper

Build #297 adds WorldCreator#keepSpawnLoaded to configure that behaviour via the API. We also fixed an issue with the entity activation range in #299, which caused ice based item sorters in the nether to fail sometimes. #ThisWeekInPaper

The new PlayerStopUsingItemEvent added in build #320 will get fired when a player for example stops using a spyglass, or stops pressing the interact button while holding a bow! #ThisWeekInPaper

Starting with #321 you can use FallingBlock#shouldAutoExpire to disable the auto expire feature for a falling block, which despawns it after a certain time. #322 stops marker entities from getting ticked, which caused performance issues if a lot of them were used #ThisWeekInPaper

On 28.04. Mojang introduced a change where clients would now display "FilteredText" for signs if they had set that tag. In a previous Paper version those tags got set due to a bug. Build #314 removes that FilteredText again, fixing blank/wrong signs. #ThisWeekInPaper

#302 brought back the old mechanic for createProfile(UUID,String). The mechanic we introduced in #263 lives on as createProfileExact. #307 added the EntityDyeEvent, which is called for sheep, wolfs & cats. #ThisWeekInPaper

Build #289 merged a few interesting additions from Spigot, noticebly a per-player worldborder API and Villager#zombify. In #290 we fixed MC-50647, which caused slime mob spawners to not spawn slimes outside of slime chunks. #ThisWeekInPaper

A big addition in #326: Paper now supports the Alternate Current redstone implementation as a faster alternative for vanilla and Eigencraft! You can activate it by setting "redstone-implementation" in your paper.yml to "alternate-current". #ThisWeekInPaper