import type { GapAnalysis } from '../schemas/gap-analysis.schema.js';
import { type BaselineSnapshot, type BaselineDelta } from './baseline.schema.js';
/**
 * Produce a filesystem-safe slug from a URL.
 * e.g. "https://my-app.vercel.app/admin" → "my-app_vercel_app__admin"
 */
export declare function slugifyUrl(url: string): string;
/**
 * Return the default root for baseline storage: `<cwd>/.qulib-baselines`.
 * Callers may supply an explicit `baseDir` to override.
 */
export declare function defaultBaselineRoot(): string;
/**
 * Save a baseline snapshot derived from the given `GapAnalysis` result.
 *
 * @returns The saved snapshot.
 */
export declare function saveBaseline(analysis: GapAnalysis, url: string, options?: {
    baseDir?: string;
    label?: string;
}): Promise<BaselineSnapshot>;
/**
 * Load a specific baseline snapshot by its `id`.
 *
 * @throws If the file does not exist or fails schema validation.
 */
export declare function loadBaseline(id: string, options?: {
    baseDir?: string;
}): Promise<BaselineSnapshot>;
/**
 * List all saved baselines for the given URL, sorted newest-first.
 *
 * Returns an empty array if no baselines exist yet.
 */
export declare function listBaselines(url: string, options?: {
    baseDir?: string;
}): Promise<BaselineSnapshot[]>;
/**
 * Delete a specific baseline snapshot by its `id`.
 *
 * @throws If the file does not exist.
 */
export declare function deleteBaseline(id: string, options?: {
    baseDir?: string;
}): Promise<void>;
/**
 * Compare two baseline snapshots and return a structured delta report.
 *
 * - `newGaps`: problems present in `current` but not in `prior`.
 * - `resolvedGaps`: problems present in `prior` but no longer in `current`.
 * - `severityChanges`: same problem (matching key) with a different severity.
 */
export declare function compareBaselines(prior: BaselineSnapshot, current: BaselineSnapshot): BaselineDelta;
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