Uncommitted changes the agent had in progress when it was stopped on
2026-10-12; may not build or pass its harnesses yet.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
ChunkHeightAndBiomeFix, ChunkProtoTickListFix, ChunkRenamesFix,
OverreachingTickFix, SpawnerDataFix, the world generation settings fixes
and the Caves & Cliffs biome and advancement renames, with the chunk's
Level tag and UNTAGGED_SPAWNER in the schema walker. A 1.17.1 sample
world upgrades as vanilla's.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The fixes from 3076 to 3459 (game event, cat, frog, painting, goat, goat
horn, filtered text, POI, blending, spawn egg, effect duration, archaeology,
double-sided signs, the 1.20 experiment and chunk statuses), the block
entities their schemas add, and block entities' remainders (a decorated
pot's shards stay next to its sherds). The sample world generator logs in
to 1.18.2 to 1.19.4 servers and gates the scene by version.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
DataFixerUpper reads typed fields without taking them out of a record's
remainder, so a typed field a fix drops comes back on write with its value
from the record's last read: entities keep their old ArmorItems, HandItems,
body_armor_item, saddle, Trident and Particle next to the new fields, as
vanilla 26.3 writes them. Fixes that write and read entities refresh that
map. The area effect cloud particle moves to custom_particle (4420), boats
keep Type (BoatSplitFix's remainder update misses), and region files with a
short header read as empty, as vanilla's RegionFile does. The sample worlds
now use the item formats each version accepts and enable its experiments.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Uncommitted changes the agent had in progress when it was stopped; may not
build or pass its harnesses yet.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Ludovic Marie