export declare const SKILLS_JSON: string;
export interface SkillManifestEntry {
    name: string;
    source: string;
    installedAt: string;
}
export declare function readManifest(): SkillManifestEntry[];
export declare function writeManifest(entries: SkillManifestEntry[]): void;
export declare function upsertManifest(name: string, source: string): void;
export declare function removeFromManifest(name: string): boolean;
export declare function snapshotDirs(): Map<string, Set<string>>;
export declare function diffSnapshots(before: Map<string, Set<string>>, after: Map<string, Set<string>>): Array<{
    dir: string;
    name: string;
}>;
export declare function extractSkillName(pkg: string): string;
export declare function findExistingSkill(name: string): {
    name: string;
    dir: string;
} | null;
/**
 * Quote one argument for a Windows command line.
 *
 * Windows programs parse their own command line with MSVCRT rules, where a run
 * of backslashes immediately before a quote escapes it. Wrapping bare in
 * `"${arg}"` therefore breaks for any argument ending in a backslash: `trailing\`
 * became `"trailing\"`, the closing quote was consumed, and the child received
 * `trailing"` — smuggling in exactly the quote character WINDOWS_UNSAFE_ARG
 * exists to reject, and letting one argument swallow the next.
 *
 * A run of 2n backslashes before the closing quote yields n literal
 * backslashes and still terminates the string, so double only that final run.
 * Interior backslashes are literal and must not be touched, or every Windows
 * path argument would be mangled.
 */
export declare function quoteWindowsArg(arg: string): string;
export declare function runNpxSkills(args: string[], stdio?: "inherit" | "pipe"): {
    status: number | null;
};
export declare function copySkillToInstance(name: string, sourceDir: string): void;
export declare function skillsFind(query?: string): void;
export declare function skillsAdd(pkg: string): void;
export declare function skillsRemove(name: string): void;
export declare function skillsList(): void;
export declare function skillsUpdate(): void;
export declare function skillsRestore(): void;
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