/**
 * Pure helpers for breadcrumb derivation.
 *
 * Extracted so the path-walking logic can be unit-tested without rendering
 * a Svelte component.
 */
import type { BreadcrumbItem, NavItem } from './types.js';
/**
 * Walk a nav tree depth-first and return the label of the item whose
 * `href` matches exactly, or `null` if not found.
 */
export declare function findLabelInNav(items: NavItem[], href: string): string | null;
/**
 * Default label fallback for unknown segments: capitalize the first letter
 * and turn dashes/underscores into spaces.
 */
export declare function capitalizeSegment(segment: string): string;
export interface DeriveCrumbsOptions {
    /** Optional first crumb (e.g., site identity). */
    rootCrumb?: BreadcrumbItem;
    /**
     * Skip pathname segments until (and including) the given path is matched.
     * Example: `startAfter: 'sites/foo'` ignores everything up through
     * `/sites/foo` in the pathname.
     */
    startAfter?: string;
    /** Fall back to capitalized segments for unmatched paths (default: true). */
    capitalize?: boolean;
}
/**
 * Derive a breadcrumb trail from a pathname + nav tree.
 *
 * Strategy:
 *  1. Optionally prepend `rootCrumb`.
 *  2. Split the pathname into segments.
 *  3. If `startAfter` is set, locate its trailing segment in the
 *     pathname and skip everything before/including it. The
 *     `startAfter` value may include a leading slash or none and
 *     may be a multi-segment path (e.g. `sites/foo`).
 *  4. Walk the remaining segments, building cumulative paths; for
 *     each, try to find a matching nav label, otherwise capitalize.
 */
export declare function deriveCrumbsFromNav(pathname: string, nav: NavItem[], options?: DeriveCrumbsOptions): BreadcrumbItem[];
//# sourceMappingURL=breadcrumbs-helpers.d.ts.map