/** @file Shared job manifest merge utilities. */

/** Merge two optional string arrays, deduplicating and filtering empties. */
export function mergeUnique(
	left: string[] | undefined,
	right: string[] | undefined,
): string[] | undefined {
	const merged = [...(left ?? []), ...(right ?? [])].filter(Boolean);
	return merged.length > 0 ? [...new Set(merged)] : undefined;
}