The `AddBoolOrInt` builder method already performs a type-switch on `any` values to emit booleans or integers. The emission bug could have been fixed by simply wiring `DeduplicateByTitle` into `AddBoolOrInt` without changing the field type. However, `any` carries no type constraints at parse time, so schema validation alone blocks expression strings from entering the field. Expression strings would have required additional ad-hoc handling that bypasses the type system and is invisible in struct definitions.