export declare function isPathInside(parent: string, candidate: string): boolean;
export declare function resolveWithin(root: string, ...segments: string[]): string;
/** Revalidates the claimed output root containing a previously resolved path. */
export declare function assertClaimedOutputPath(filePath: string): void;
/**
 * Resolves a generated destination and rejects any existing symlink component.
 * This is synchronous so callers can validate immediately before an fs call.
 */
export declare function resolveOutputPath(root: string, ...segments: string[]): string;
export declare function readOutputFileIfPresent(root: string, ...segments: string[]): Promise<string | null>;
/**
 * Claims an empty output directory, recognizes directories generated by older
 * Doccupine versions, and refuses to overwrite arbitrary existing projects.
 */
export declare function claimOutputDirectory(outputDir: string): Promise<void>;