classFeatExpansionCanUseFeat excludes ALLCLASSESCANUSE=0 feats from class feat table masterfeat expansion. When such a feat also has no MinLevelClass, no class can ever obtain it — a data bug that previously failed silently (e.g. Spell Focus vanishing from the wizard table). New validator warns for exactly that case; deliberate exclusions with an explicit MinLevelClass stay silent. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>