- Update all OpenAPI version snapshots (2.0.x, 3.0.x, 3.1.x) to reflect fix - Add missing 2.0.x additional-properties-false test snapshots - Fix enum type generation (union types instead of keyof typeof patterns) - Fix client error type handling - Ensure allOf composition generates clean Foo & {} instead of Foo & { [key: string]: never } - All 233 tests across all versions now passing (25 + 69 + 139)