add flake

setting up dev env and starting MCP services

flake.nix

@@ -0,0 +1,53 @@
+{
+  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
+          '';
+        };
+      });
+}