diff --git a/types/treescape/.npmignore b/types/treescape/.npmignore
new file mode 100644
index 000000000000000..93e307400a5456b
--- /dev/null
+++ b/types/treescape/.npmignore
@@ -0,0 +1,5 @@
+*
+!**/*.d.ts
+!**/*.d.cts
+!**/*.d.mts
+!**/*.d.*.ts
diff --git a/types/treescape/index.d.ts b/types/treescape/index.d.ts
new file mode 100644
index 000000000000000..0c2dbd52fb3a2f1
--- /dev/null
+++ b/types/treescape/index.d.ts
@@ -0,0 +1,18 @@
+export class TreeNode {
+    val: number;
+    left: TreeNode | null;
+    right: TreeNode | null;
+    constructor(val?: number, left?: TreeNode | null, right?: TreeNode | null);
+}
+/**
+ * Creates a binary tree from a level-order array (use `null` for empty nodes).
+ * @param arr Level-order array representing the tree.
+ * @returns The root TreeNode or null if the array is empty.
+ */
+export function convertToTree(arr: (number | null)[]): TreeNode | null;
+
+/**
+ * Prints the tree in ASCII format to the console.
+ * @param treeNode The root TreeNode to print.
+ */
+export function printTree(treeNode: TreeNode | null): void;
diff --git a/types/treescape/package.json b/types/treescape/package.json
new file mode 100644
index 000000000000000..2e07c32654e79f8
--- /dev/null
+++ b/types/treescape/package.json
@@ -0,0 +1,17 @@
+{
+    "private": true,
+    "name": "@types/treescape",
+    "version": "1.0.9999",
+    "projects": [
+        "https://www.npmjs.com/package/treescape"
+    ],
+    "devDependencies": {
+        "@types/treescape": "workspace:."
+    },
+    "owners": [
+        {
+            "name": "Shan0102",
+            "githubUsername": "Shan0102"
+        }
+    ]
+}
diff --git a/types/treescape/treescape-tests.ts b/types/treescape/treescape-tests.ts
new file mode 100644
index 000000000000000..50c362ce86318c6
--- /dev/null
+++ b/types/treescape/treescape-tests.ts
@@ -0,0 +1,4 @@
+import { convertToTree, printTree } from "treescape";
+
+const tree = convertToTree([1, 2, 3, null, 4, 5, 6]);
+printTree(tree);
diff --git a/types/treescape/tsconfig.json b/types/treescape/tsconfig.json
new file mode 100644
index 000000000000000..73badb2c9f157f2
--- /dev/null
+++ b/types/treescape/tsconfig.json
@@ -0,0 +1,14 @@
+{
+    "compilerOptions": {
+        "module": "node16",
+        "lib": ["es6"],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": ["index.d.ts", "treescape-tests.ts"]
+}