Version 1.3.0

This release is marked as BETA.

1.3.0 covers a lot of new ground (Advancements tab, redesigned tab strip, three modder-facing datapack formats, a new client setting), and some of it hasn't been battle-tested across a wide variety of worlds yet. Marking it beta gives time to catch any rough edges before promoting to stable. Your progress is safe: existing worlds upgrade in place with no data loss, and downgrading to 1.2.6 if you hit something weird won't lose anything either!

Added

• Advancements tab: Biggest, highly requested new feature for this update! Tracks every vanilla and modded advancement, with proper icons and titles even before you've started them
• Advancement Badge item, awarded for completing the Advancements tab
• Tab Icon Style setting: choose Minecraft items, custom sprites, or the mod's badges for the tab strip
• Tab strip redesigned with smaller icon tabs & hover tooltips.
• Settings screen now works in pages at 8 rows per page. Operators get a clean preferences / world-admin split
• /collect_everything overrides command for pack-author debugging

Improved

• Big mod-compatibility push: biome / structure icons, ageable mob tag, entity preview tuning, and modded variant sources are now all configurable via JSON without source patches
• Existing worlds: already-earned advancements backfill silently on first join, no notification flood
• Master badge requirement unchanged: still the original seven tabs. Anyone close to mastery in 1.2.x can finish it in 1.3.0 the same way
• Datapack reload (/reload) propagates new advancements + icons to every connected player without restarting the server
• Advancement sort matches the vanilla advancements GUI tree order (Minecraft → Adventure → Husbandry → Nether → End, parent before children)
• Advancement collect sound replaced with a light chime. The vanilla advancement-earned jingle already plays from the game itself, so layering both was overwhelming
• Names for advancement entries now display in your selected language
• Path prettifier handles advancement-style ids with slashes, so adventure/avoid_vibration now displays as "Adventure Avoid Vibration"
• 1.2.x clients connecting to a 1.3.0 server gracefully skip the new advancement category, so no phantom items appear in their Items tab
• Minecraft tab icon style uses curated picks (creeper head for entities, chest for structures, potion of healing for effects, custom sprite for advancements) instead of generic defaults

Fixed

• Advancement-icon NBT preserved across the network: custom item names and dyed armor on advancement icons no longer fall back to plain items
• Root advancements (the GUI's branch headers) won't clutter the list
• Display-less helper advancements (invisible in vanilla GUI) filtered