The first commit, the core and all files is adding to repo

scripts/clean-build.mjs

@@ -0,0 +1,37 @@
+import { resolve } from "node:path";
+import { existsSync } from "node:fs";
+import { rm } from "node:fs/promises";
+import { spawn } from "node:child_process";
+// OneDrive marks directories as Windows reparse points, which Next's Node
+// cleanup may mistake for links. Use native PowerShell for this build cache.
+const root = resolve("."),
+  target = resolve(root, ".next");
+if (target !== resolve(root, ".next") || !target.startsWith(root))
+  throw new Error("Unsafe build cache target");
+if (existsSync(target)) {
+  if (process.platform === "win32")
+    await new Promise((accept, reject) => {
+      const escaped = target.replaceAll("'", "''");
+      const child = spawn(
+        "powershell.exe",
+        [
+          "-NoProfile",
+          "-NonInteractive",
+          "-Command",
+          `Remove-Item -LiteralPath '${escaped}' -Recurse -Force -ErrorAction Stop`,
+        ],
+        { stdio: "inherit", windowsHide: true },
+      );
+      child.on("exit", (code) =>
+        code === 0
+          ? accept()
+          : reject(
+              new Error(
+                "Could not clear the Next build cache. Stop the dev server first.",
+              ),
+            ),
+      );
+      child.on("error", reject);
+    });
+  else await rm(target, { recursive: true, force: true });
+}