chore: add MCP configuration file

Example configuration for running the nixos-options MCP server
via Claude Code or other MCP clients.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.mcp.json

@@ -0,0 +1,16 @@
+{
+  "mcpServers": {
+    "nixos-options": {
+      "command": "nix",
+      "args": [
+        "run",
+        ".",
+        "--",
+        "serve"
+      ],
+      "env": {
+        "NIXOS_OPTIONS_DATABASE": "sqlite://:memory:"
+      }
+    }
+  }
+}