(** Read layer info for packages from day10's cache directory *)

type layer_info = {
  package: string;
  deps: string list;
  created: float;  (** Unix timestamp *)
  exit_status: int;
}

(** Get layer info for a specific package.
    Uses symlink if available, falls back to scanning build-* directories. *)
val get_package_layer : cache_dir:string -> platform:string -> package:string -> layer_info option

(** List all packages with their layer info.
    Used for computing reverse dependencies. *)
val list_all_packages : cache_dir:string -> platform:string -> (string * layer_info) list

(** Get reverse dependencies: packages that depend on the given package. *)
val get_reverse_deps : cache_dir:string -> platform:string -> package:string -> string list