{
  description = "MCP-Experiment mit SQLite, Ollama und Qwen-LLM";

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

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = nixpkgs.legacyPackages.${system};
      in {
        devShell = pkgs.mkShell {
          name = "mcp-experiment-shell";
          buildInputs = with pkgs; [
            go
            jq
            nodejs
            ollama
            python310
            sqlite
            tmux
          ];

          shellHook = ''
            echo "Installiere Python-Tools..."
            pip install --user uv

            echo "Installiere NodeJS-Tools..."
            npm install @modelcontextprotocol/server-filesystem

            echo "Installiere mcphost über Go..."
            export GOPATH=$HOME/go
            export PATH=$GOPATH/bin:$PATH
            go install github.com/mark3labs/mcphost@latest

            # check that "ollama serve" is running

            echo "Lade Qwen-LLM in Ollama..."
            ollama pull qwen2.5

            # tmux-Session mit mehreren Fenstern
            session="mcp"
            if ! tmux has-session -t $session 2>/dev/null; then
              tmux new-session -d -s $session -n sqlite "uvx mcp-server-sqlite --db-path ./Car_Database.db"
              tmux new-window -t $session:1 -n fs "npx @modelcontextprotocol/server-filesystem ."
              tmux new-window -t $session:2 -n ollama "ollama run --model qwen2.5"
              tmux new-window -t $session:3 -n host "mcphost -m ollama:qwen2.5 --config ./config.json"
            fi
            tmux attach -t $session
          '';
        };
      });
}