fix partial command detection

Author: AmirSa12

bin/cli.ts

@@ -41,9 +41,10 @@ async function main() {
       const completion = new PackageManagerCompletion(packageManager);
       await setupCompletionForPackageManager(packageManager, completion);
       let toComplete = args.slice(2);
-      // Only append -- if there are actual args (PowerShell stripped the trailing --)
-      if (toComplete.length > 0) {
-        toComplete.push('--');
+      // In PowerShell, -- is stripped. Only append it if the last arg is a flag
+      // (starts with -), meaning we want flag/option completion
+      if (toComplete.length > 0 && toComplete[toComplete.length - 1].startsWith('-')) {
+        toComplete = [...toComplete, '--'];
       }
       await completion.parse(toComplete);
       process.exit(0);