{
  description = "Standalone Codex controller loop framework";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs =
    {
      self,
      nixpkgs,
      flake-utils,
      ...
    }:
    (flake-utils.lib.eachDefaultSystem (
      system:
      let
        pkgs = import nixpkgs { inherit system; };
        codex-controller-loop = pkgs.callPackage ./nix/packages/codex-controller-loop.nix { };
      in
      {
        packages = {
          inherit codex-controller-loop;
          default = codex-controller-loop;
        };

        apps = {
          codex-controller-loop = {
            type = "app";
            program = "${codex-controller-loop}/bin/codex-controller-loop";
          };
          default = self.apps.${system}.codex-controller-loop;
        };

        devShells.default = pkgs.mkShell {
          packages = [
            pkgs.git
            pkgs.rustc
            pkgs.cargo
            pkgs.clippy
            pkgs.rustfmt
            pkgs.rust-analyzer
          ];
        };
      }))
    // {
    overlays.default = final: prev: {
      codex-controller-loop = final.callPackage ./nix/packages/codex-controller-loop.nix { };
    };
  };
}