Add a nullable ClassId axis to PackDrawCardWeightEntry. Null means the
row applies to any draw (the existing behavior for non-RS packs); 1..8
restricts the row to a specific class draw on a RotationStarterCardPack.
Slot rates are class-invariant (verified against per-klan captures), so
PackDrawSlotRateEntry is unchanged.
PackOpenService.Draw now takes an optional classId parameter. With a
class supplied, the card pool is filtered to (ClassId == classId ||
ClassId == null); without one, class-tagged rows are excluded so a
mistaken non-RS call against a mixed table can't leak class-specific
cards.
PackController.Open lifts the 501 guard on RotationStarterCardPack and
plumbs class_id through. Class_id is now required (and validated 1..8)
for RS packs and rejected as 400 BadRequest on non-RS packs. The skin
overload (target_card_id) remains 501 — out of scope for this work.
Seed JSON regenerated end-to-end: 32 RS packs now carry 30,160 class-
tagged weight rows; 247 non-RS packs keep their existing ~87k null-class
rows. Slot rate fix from the upstream extractor change replaces the
~99.99% conditional-rate sums on 97xxx/93xxx packs with the page's
authoritative 1.5/6/25/67.5 distribution.
Migration AddPackDrawCardWeightClassId. End-to-end bootstrap verified
against fresh Postgres; pack 93025 reads back exactly 122/119/120/120/
120/121/118/119 weights for classes 1-8.
Tests: 3 new PackOpenServiceTests (class filter happy path, disjoint
pools, defensive null-class isolation); existing class_id-on-non-RS
controller test updated 501 → 400 BadRequest; one stub-importer test
corrected to match extractor-authored gacha_detail.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Sampler is now driven by PackDrawTable: roll DrawTier per slot by
cumulative slot-rate weights, then pick a card within tier by per-card
weights renormalized within the tier. Rate-less Guaranteed-Leader-Card
rows draw uniform over (pool minus owned), falling back to the full
pool when all are owned. Bonus slot fires once at the end of a 10-pack
open when HasBonusSlot is set.
Slot 8 falls back to the general slot's per-card weights for the rolled
tier when slot-8 has only a rarity-level rate quoted (the common shape
on normal packs).
PackController.Open loads the draw table + viewer owned card ids and
passes them to the sampler; the category-based forced-Legendary slot-8
override is gone. ICardFoilLookup replaces ICardPoolProvider for the
foil-twin heuristic.
Drops the test-fixture pack-draw seed overlay so the production seed
flows through the importer tests; controller tests that fabricate their
own card sets now call factory.SeedPackDrawTableAsync(...) to install a
matching stub draw table.
WeightedPick helper handles the cumulative-band roll for both stages.
Five sampler tests + four WeightedPick tests + five importer/repo
tests; full suite is 653/653 green.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
