{
  description = ''
    For questions just DM me on X: https://twitter.com/@m3tam3re
    There is also some NIXOS content on my YT channel: https://www.youtube.com/@m3tam3re

    One of the best ways to learn NIXOS is to read other peoples configurations. I have personally learned a lot from Gabriel Fontes configs:
    https://github.com/Misterio77/nix-starter-configs
    https://github.com/Misterio77/nix-config

    Please also check out the starter configs mentioned above.
  '';

  inputs = {
    home-manager = {
      url = "github:nix-community/home-manager/release-25.11";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    home-manager-unstable = {
      url = "github:nix-community/home-manager/master";
      inputs.nixpkgs.follows = "nixpkgs-unstable";
    };
    nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11";
    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";

    m3ta-nixpkgs.url = "git+https://code.m3ta.dev/m3tam3re/nixpkgs";
    # m3ta-nixpkgs.url = "path:/home/sascha.koenig/p/NIX/nixpkgs";
    #
    llm-agents.url = "github:numtide/llm-agents.nix";

    nur = {
      url = "github:nix-community/NUR";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    disko = {
      url = "github:nix-community/disko";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    agenix.url = "github:ryantm/agenix";

    deploy-rs.url = "github:serokell/deploy-rs";

    nixos-anywhere = {
      url = "github:nix-community/nixos-anywhere";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    nix-colors.url = "github:misterio77/nix-colors";
    nix-ai-tools.url = "github:numtide/nix-ai-tools";

    # agents = {
    #   # url = "path:/home/sascha.koenig/p/AI/AGENTS";
    #   url = "git+https://code.m3ta.dev/m3tam3re/AGENTS";
    #   flake = false;
    # };

    agents = {
      # url = "path:/home/sascha.koenig/p/AI/AGENTS";
      url = "git+https://code.m3ta.dev/m3tam3re/AGENTS";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    skills-anthropic = {
      url = "github:anthropics/skills";
      flake = false;
    };

    zugferd-service = {
      url = "git+https://git.az-gruppe.com/AZ-Intec-GmbH/zugferd-service";
    };
  };

  outputs = {
    self,
    agenix,
    agents,
    deploy-rs,
    home-manager,
    llm-agents,
    nixpkgs,
    m3ta-nixpkgs,
    nur,
    ...
  } @ inputs: let
    inherit (self) outputs;
    systems = [
      "aarch64-linux"
      "i686-linux"
      "x86_64-linux"
      "aarch64-darwin"
      "x86_64-darwin"
    ];
    forAllSystems = nixpkgs.lib.genAttrs systems;
  in {
    packages =
      forAllSystems (system: import ./pkgs nixpkgs.legacyPackages.${system});
    overlays = let
      all = import ./overlays {inherit inputs;};
    in
      builtins.removeAttrs all ["mkLlmAgentsOverlay"];
    lib.mkLlmAgentsOverlay = (import ./overlays {inherit inputs;}).mkLlmAgentsOverlay;

    # Development shell
    devShells = forAllSystems (system: let
      pkgs = import nixpkgs {
        inherit system;
        config.allowUnfree = true; # Allow unfree packages in devShell
      };
      m3taLib = m3ta-nixpkgs.lib.${system};
      rules = m3taLib.opencode-rules.mkOpencodeRules {
        inherit agents;
        languages = ["nix"];
      };
    in {
      default = pkgs.mkShell {
        inherit (rules) instructions;
        buildInputs = with pkgs; [
          alejandra
          nixd
          opencode
          agenix.packages.${system}.default
        ];

        shellHook = ''
          ${rules.shellHook}
          echo "🚀 NixOS Infrastructure Development Shell with Opencode Rules"
          echo ""
          echo "Active rules:"
          echo "  - Nix language conventions"
          echo "  - Coding-style best practices"
          echo "  - Naming conventions"
          echo "  - Documentation standards"
          echo "  - Testing guidelines"
          echo "  - Git workflow patterns"
          echo "  - Project structure guidelines"
          echo ""
          echo "Generated files:"
          echo "  - .opencode-rules/ (symlink to AGENTS repo)"
          echo "  - opencode.json (configuration file)"
          echo ""
          echo "Useful commands:"
          echo "  - cat opencode.json        View rules configuration"
          echo "  - ls .opencode-rules/      Browse available rules"
          echo "  - nix develop              Re-enter this shell"
          echo ""
          echo "Remember to add to .gitignore:"
          echo "  .opencode-rules"
          echo "  opencode.json"
          echo "======================================"
        '';
      };
    });

    nixosConfigurations = {
      AZ-CLD-1 = nixpkgs.lib.nixosSystem {
        specialArgs = {
          inherit inputs outputs;
          system = "x86_64-linux";
        };
        modules = [
          ./hosts/AZ-CLD-1
          agenix.nixosModules.default
          inputs.disko.nixosModules.disko
          inputs.zugferd-service.nixosModules.default
        ];
      };
      AZ-PRM-1 = nixpkgs.lib.nixosSystem {
        specialArgs = {
          inherit inputs outputs;
          system = "x86_64-linux";
        };
        modules = [
          ./hosts/AZ-PRM-1
          agenix.nixosModules.default
          inputs.disko.nixosModules.disko
        ];
      };
      AZLT124-L = inputs.nixpkgs-unstable.lib.nixosSystem {
        specialArgs = {
          inherit inputs outputs;
          system = "x86_64-linux";
        };
        modules = [
          ./hosts/AZLT124-L
          agenix.nixosModules.default
          inputs.home-manager-unstable.nixosModules.home-manager
          m3ta-nixpkgs.nixosModules.default
        ];
      };
    };
    homeConfigurations = {
      "logistik@AZPILOGISTIK01" = let
        system = "aarch64-linux";
      in
        home-manager.lib.homeManagerConfiguration {
          pkgs = nixpkgs.legacyPackages.${system};
          extraSpecialArgs = {
            inherit inputs outputs system;
            hostname = "AZPILOGISTIK01";
            username = "logistik";
          };
          modules = [./home/users/logistik/AZPILOGISTIK01.nix];
        };
      "logistik@AZPILOGISTIK02" = let
        system = "aarch64-linux";
      in
        home-manager.lib.homeManagerConfiguration {
          pkgs = nixpkgs.legacyPackages.${system};
          extraSpecialArgs = {
            inherit inputs outputs system;
            hostname = "AZPILOGISTIK02";
            username = "logistik";
          };
          modules = [./home/users/logistik/AZPILOGISTIK02.nix];
        };
      "logistik@AZPILOGISTIK03" = let
        system = "aarch64-linux";
      in
        home-manager.lib.homeManagerConfiguration {
          pkgs = nixpkgs.legacyPackages.${system};
          extraSpecialArgs = {
            inherit inputs outputs system;
            hostname = "AZPILOGISTIK03";
            username = "logistik";
          };
          modules = [./home/users/logistik/AZPILOGISTIK03.nix];
        };
      "logistik@AZPILOGISTIK04" = let
        system = "aarch64-linux";
      in
        home-manager.lib.homeManagerConfiguration {
          pkgs = nixpkgs.legacyPackages.${system};
          extraSpecialArgs = {
            inherit inputs outputs system;
            hostname = "AZPILOGISTIK04";
            username = "logistik";
          };
          modules = [./home/users/logistik/AZPILOGISTIK04.nix];
        };
      "logistik@AZPILOGISTIK05" = let
        system = "aarch64-linux";
      in
        home-manager.lib.homeManagerConfiguration {
          pkgs = nixpkgs.legacyPackages.${system};
          extraSpecialArgs = {
            inherit inputs outputs system;
            hostname = "AZPILOGISTIK05";
            username = "logistik";
          };
          modules = [./home/users/logistik/AZPILOGISTIK05.nix];
        };
      "logistik@AZPILOGISTIKTEST" = let
        system = "aarch64-linux";
      in
        home-manager.lib.homeManagerConfiguration {
          pkgs = nixpkgs.legacyPackages.${system};
          extraSpecialArgs = {
            inherit inputs outputs system;
            hostname = "AZPILOGISTIKTEST";
            username = "logistik";
          };
          modules = [./home/users/logistik/AZPILOGISTIKTEST.nix];
        };
      "produktion@AZPIPRODUKTION01" = let
        system = "aarch64-linux";
      in
        home-manager.lib.homeManagerConfiguration {
          pkgs = nixpkgs.legacyPackages.${system};
          extraSpecialArgs = {
            inherit inputs outputs system;
            hostname = "AZPIPRODUKTION01";
            username = "produktion";
          };
          modules = [./home/users/produktion/AZPIPRODUKTION01.nix];
        };
      "produktion@AZPIPRODUKTION02" = let
        system = "aarch64-linux";
      in
        home-manager.lib.homeManagerConfiguration {
          pkgs = nixpkgs.legacyPackages.${system};
          extraSpecialArgs = {
            inherit inputs outputs system;
            hostname = "AZPIPRODUKTION02";
            username = "produktion";
          };
          modules = [./home/users/produktion/AZPIPRODUKTION02.nix];
        };
      "produktion@AZPIPRODUKTION03" = let
        system = "aarch64-linux";
      in
        home-manager.lib.homeManagerConfiguration {
          pkgs = nixpkgs.legacyPackages.${system};
          extraSpecialArgs = {
            inherit inputs outputs system;
            hostname = "AZPIPRODUKTION03";
            username = "produktion";
          };
          modules = [./home/users/produktion/AZPIPRODUKTION03.nix];
        };
      "produktion@AZPIPRODUKTION04" = let
        system = "aarch64-linux";
      in
        home-manager.lib.homeManagerConfiguration {
          pkgs = nixpkgs.legacyPackages.${system};
          extraSpecialArgs = {
            inherit inputs outputs system;
            hostname = "AZPIPRODUKTION04";
            username = "produktion";
          };
          modules = [./home/users/produktion/AZPIPRODUKTION04.nix];
        };
      "vertrieb@AZPIVERTRIEB01" = let
        system = "aarch64-linux";
      in
        home-manager.lib.homeManagerConfiguration {
          pkgs = nixpkgs.legacyPackages.${system};
          extraSpecialArgs = {
            inherit inputs outputs system;
            hostname = "AZPIVERTRIEB01";
            username = "vertrieb";
          };
          modules = [./home/users/vertrieb/AZPIVERTRIEB01.nix];
        };
    };
    deploy.nodes = {
      AZ-CLD-1 = {
        hostname = "AZ-CLD-1";
        profiles.system = {
          sshUser = "sascha.koenig";
          interactiveSudo = false;
          sshOpts = ["-tt"];
          remoteBuild = true;
          path = deploy-rs.lib.x86_64-linux.activate.nixos self.nixosConfigurations.AZ-CLD-1;
        };
      };
    };
  };
}