FTB Teams was the only thing holding FTB Quests down -- FTB Quests' 1.21.1
build requires it, and its bytecode references dev/ftb/mods/ftbteams in 14
classes including the event handler, so it breaks at runtime without it. With
quests unused, the whole block goes. XMod Compat only bridged
Quests/Chunks/Ranks, all of which are now gone.
FTB Library stays because FTB Backups 3 builds its config UI on it
(Panel/Theme/Widget/ConfigGroup/ConfigValue/SNBTCompoundTag, 13 classes, and
it does not bundle them despite declaring only neoforge). Architectury API
stays because FTB Library references it in 47 classes.
Verified before removing: FTB Library and FTB Backups 3 reference ftbteams,
ftbquests and ftbxmodcompat in zero classes each, and nothing else in the pack
references them.
CurseForge-sourced mods drop from 9 to 5; pack is 146 mods. OPAC's built-in
party system is now the only one, so primaryPartySystem should be left at its
default rather than pointed at ftbteams.
The swap does not carry players' explored terrain across. FTB Chunks stores no
rendered map (its region zips hold chunks.dat plus five data PNGs, one of which
packs height into an image channel), and Xaero's region format is closed and now
version 6 with per-pixel NBT blobs, so the community converters no longer work.
Rather than convert pixels, prune a copy of the world save down to exactly the
chunks a player revealed and let Xaero's own generator map it.
Validated against real data: extracting the 167-region / 98,170-chunk mask
cross-checks clean against FTB's own pixel data, and Anvil pruning round-trips
byte-identically (15.7 MB -> 471 KB on a live region file, slot-to-chunk mapping
confirmed against 1024 chunk NBT headers).
Deferred for now: needs the world save and one singleplayer pass per player.
See analysis/FTB-XAERO-MAP-MIGRATION.md.
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