{
  hosts,
  lib,
  root,
  util,
}:
let
  definitions = import ./registry/definitions.nix {
    inherit lib root util;
  };

in
{
  types = lib.mapAttrs (_name: definition: definition.type) definitions;

  module = {
    options.registry = lib.mapAttrs (
      _name: registry:
      lib.mkOption {
        type = lib.types.attrsOf (lib.types.attrsOf registry.type);
        default = { };
        description = ''
          Lazily collected fleet-visible registry entries, nested by host and entry name.
        '';
      }
    ) definitions;
  };

  collected = import ./registry/collection.nix {
    inherit definitions hosts lib;
    validate = import ./registry/validation.nix { inherit definitions lib; };
  };
}