export type GenerateProgressEvent =
  | { phase: "generate"; current: number; total: number }
  | { phase: "zip"; current: number; total: number }
  | { phase: "done"; id: string }
  | { phase: "error"; message: string };

export function isProgressEvent(value: unknown): value is GenerateProgressEvent {
  if (!value || typeof value !== "object") return false;
  const phase = (value as { phase?: unknown }).phase;
  return (
    phase === "generate" ||
    phase === "zip" ||
    phase === "done" ||
    phase === "error"
  );
}