diff --git a/package.json b/package.json
index e54aa3f..8890c37 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "lint": "pnpm -r --parallel lint",
     "prettier": "prettier --check .",
     "prettier-fix": "prettier --write .",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "pnpm -r --parallel typecheck"
   },
   "files": [
     "dist"
@@ -31,4 +31,4 @@
     "eslint": "^8.56.0",
     "prettier": "^3.2.4"
   }
-}
+}
\ No newline at end of file
diff --git a/plugin/src/utils/helpers.ts b/plugin/src/utils/helpers.ts
index 9241280..c7a2f92 100644
--- a/plugin/src/utils/helpers.ts
+++ b/plugin/src/utils/helpers.ts
@@ -16,7 +16,7 @@ import {
   type Node,
 } from './nodes'
 
-export const getAncestor = <N extends Node>(ofType: (node: Node) => node is N, for_: Node): N => {
+export const getAncestor = <N extends Node>(ofType: (node: Node) => node is N, for_: Node): N | undefined => {
   let current: Node | undefined = for_.parent
   while (current) {
     if (ofType(current)) return current
diff --git a/sandbox/package.json b/sandbox/package.json
index 91b34b1..99e20bb 100644
--- a/sandbox/package.json
+++ b/sandbox/package.json
@@ -8,7 +8,8 @@
     "dev": "vite",
     "build": "tsc && vite build",
     "lint": "eslint . --ext ts,tsx --report-unused-disable-directives --max-warnings 0",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "typecheck": "tsc --noEmit"
   },
   "dependencies": {
     "@pandacss/eslint-plugin": "workspace:*",
@@ -29,4 +30,4 @@
     "vite": "^5.0.12",
     "vite-plugin-eslint": "^1.8.1"
   }
-}
+}
\ No newline at end of file
diff --git a/tsconfig.build.json b/tsconfig.build.json
index c7f5c03..60d581f 100644
--- a/tsconfig.build.json
+++ b/tsconfig.build.json
@@ -7,7 +7,11 @@
     "esModuleInterop": true,
     "jsx": "preserve",
     "noEmit": true,
-    "lib": ["dom", "dom.iterable", "esnext"],
+    "lib": [
+      "dom",
+      "dom.iterable",
+      "esnext"
+    ],
     "target": "esnext",
     "noImplicitReturns": false,
     "resolveJsonModule": true,
@@ -16,6 +20,8 @@
     "verbatimModuleSyntax": true,
     "moduleResolution": "Bundler",
     "module": "ESNext",
-    "customConditions": ["source"]
+    "customConditions": [
+      "source"
+    ],
   }
-}
+}
\ No newline at end of file