/** Load taxonomy slugs from shipped `feature-taxonomy.json` (no memo — prefer `loadKnownFeatureSlugs()` for hot path). */
export declare function loadKnownFeatureSlugsFromJsonFile(): Set<string>;
/** Advisory warnings for slugs not present in the known set (registry or JSON fallback). */
export declare function collectUnknownFeatureSlugWarnings(features: string[] | undefined, knownSlugs?: Set<string>): string[];
