/**
 * Shared recursive directory walker used by scan-directory, export-sarif,
 * compliance-report, policy-check, and generate-policy tools.
 */
/**
 * Recursively walk a directory, collecting file paths that match
 * known source extensions, Dockerfiles, or config file names.
 *
 * @param dir       - Directory to walk
 * @param recursive - Whether to descend into subdirectories
 * @param excludes  - Set of directory names to skip
 * @param results   - Accumulator array (mutated in place)
 * @param unsupportedResults - Optional accumulator for files with unsupported types
 */
export declare function walkDirectory(dir: string, recursive: boolean, excludes: Set<string>, results: string[], unsupportedResults?: string[]): void;