export declare class SkillApiError extends Error {
}
export interface SkillEntry {
    name: string;
    type?: string;
    description?: string;
    /** Path or absolute URL to the SKILL.md. */
    url: string;
    /** `sha256:<hex>` over the exact SKILL.md bytes. */
    digest?: string;
}
export declare function resolveBase(baseUrl?: string): string;
export declare function fetchSkillIndex(baseUrl?: string): Promise<SkillEntry[]>;
export declare function digestOf(bytes: Uint8Array): string;
export interface FetchedSkill {
    entry: SkillEntry;
    /** The exact SKILL.md bytes, digest-verified against the index. */
    bytes: Uint8Array;
}
/**
 * Fetch one skill's SKILL.md and verify it against the index digest. A
 * mismatch is refused outright - never serve bytes the index does not vouch
 * for.
 */
export declare function fetchSkill(name: string, baseUrl?: string): Promise<FetchedSkill>;