Variable: UI_METADATA_FIELDS

const UI_METADATA_FIELDS: readonly ["mode", "in_sidebar", "display_order", "label", "icon", "description", "breadcrumb", "routes", "permissions", "note", "feature_flag"];

Canonical, ordered set of StudioUIMetadata field names. Single source of truth — KindDefinitionSpec.from_raw/zod validate ui: keys against THIS list (no second hardcoded list). Mirrors the Python dataclass field order.