Limit Vitest to source test tree

package.json

@@ -10,7 +10,7 @@
     "build": "tsc -p tsconfig.json",
     "dev": "tsx watch src/index.ts",
     "start": "node dist/index.js",
-    "test": "vitest run",
+    "test": "vitest run --config vitest.config.ts",
     "typecheck": "tsc -p tsconfig.json --noEmit"
   },
   "dependencies": {

vitest.config.ts

@@ -0,0 +1,8 @@
+import { defineConfig } from "vitest/config";
+
+export default defineConfig({
+  test: {
+    include: ["tests/**/*.test.ts"],
+    exclude: ["dist/**", "node_modules/**"],
+  },
+});