- Add rarity name cross-reference table in Background section mapping PRD
display names (Replacement/Reserve/Starter/All-Star/MVP/Hall of Fame) to
codebase names (Common/Bronze/Silver/Gold/Diamond/HoF) with IDs
- Fix T4-2: correct Gold OPS threshold from 0.700 to 0.900 (confirmed in
rarity_thresholds.py); add note that 0.700 is the Bronze floor
- Fix T4-1: restate truncation invariant as a single precise assertion —
sum(columns) == 108 - truncated_amount — instead of two independent checks
that can both pass while the sum is wrong for unrelated reasons
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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