/**
 * Built-in Advisor Rules — Canonical URL Sanity
 *
 * Pre-configured rules that catch known-bad canonical URLs in the FHIR
 * ecosystem. Based on Health Samurai's 2024 terminology data analysis:
 * four of the five most-referenced CodeSystems have documented typos.
 *
 * These rules ship as defaults — users can disable them individually.
 */
import type { AdvisorRule } from './advisor-rules';
export declare const CANONICAL_URL_SANITY_RULES: AdvisorRule[];
/**
 * Known canonical URL normalization mappings.
 * Left = what appears in resources, Right = correct canonical.
 */
export declare const CANONICAL_URL_NORMALIZATIONS: Array<{
    pattern: string | RegExp;
    canonical: string;
    description: string;
}>;
/**
 * Normalize a canonical URL using the known mappings.
 * Returns the corrected URL if a match is found, or the original.
 */
export declare function normalizeCanonicalUrl(url: string): {
    normalized: string;
    wasNormalized: boolean;
    description?: string;
};
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