feat: improved the Claude Kit as a plugin

scripts/notify.cjs

@@ -0,0 +1,52 @@
+#!/usr/bin/env node
+/**
+ * Notification hook: cross-platform desktop notification.
+ * Supports macOS (osascript), Linux (notify-send), and Windows (PowerShell).
+ * Fails open — notification errors are silently ignored.
+ */
+"use strict";
+
+const { execFileSync } = require("child_process");
+const os = require("os");
+
+function sanitize(str) {
+  return str.replace(/[^\w\s.,!?:;\-()]/g, "");
+}
+
+function notify(title, message) {
+  const platform = os.platform();
+  const safeTitle = sanitize(title);
+  const safeMessage = sanitize(message);
+
+  if (platform === "darwin") {
+    execFileSync("osascript", [
+      "-e",
+      `display notification "${safeMessage}" with title "${safeTitle}"`,
+    ], { stdio: "ignore", timeout: 5000 });
+  } else if (platform === "linux") {
+    execFileSync("notify-send", [safeTitle, safeMessage], {
+      stdio: "ignore",
+      timeout: 5000,
+    });
+  } else if (platform === "win32") {
+    execFileSync("powershell.exe", [
+      "-Command",
+      `Add-Type -AssemblyName System.Windows.Forms; [System.Windows.Forms.MessageBox]::Show('${safeMessage}', '${safeTitle}', 'OK', 'Information')`,
+    ], { stdio: "ignore", timeout: 5000 });
+  }
+}
+
+async function main() {
+  try {
+    let data = "";
+    for await (const chunk of process.stdin) data += chunk;
+    const input = JSON.parse(data);
+
+    const message = input?.message ?? "Needs your attention";
+    notify("Claude Code", message);
+  } catch {
+    // Fail open — notification errors should never block work
+  }
+}
+
+main();