fix(core): ensure --yolo does not force headless mode (#18976)

Author: NTaylorMullen

packages/core/src/utils/headless.test.ts

@@ -120,18 +120,18 @@ describe('isHeadlessMode', () => {
     }
   });
 
-  it('should return true if -y or --yolo is in process.argv as a fallback', () => {
+  it('should return false if -y or --yolo is in process.argv as a fallback', () => {
     const originalArgv = process.argv;
     process.argv = ['node', 'index.js', '-y'];
     try {
-      expect(isHeadlessMode()).toBe(true);
+      expect(isHeadlessMode()).toBe(false);
     } finally {
       process.argv = originalArgv;
     }
 
     process.argv = ['node', 'index.js', '--yolo'];
     try {
-      expect(isHeadlessMode()).toBe(true);
+      expect(isHeadlessMode()).toBe(false);
     } finally {
       process.argv = originalArgv;
     }

packages/core/src/utils/headless.ts

@@ -44,9 +44,6 @@ export function isHeadlessMode(options?: HeadlessModeOptions): boolean {
     return true;
   }
 
-  // Fallback: check process.argv for flags that imply headless or auto-approve mode.
-  return process.argv.some(
-    (arg) =>
-      arg === '-p' || arg === '--prompt' || arg === '-y' || arg === '--yolo',
-  );
+  // Fallback: check process.argv for flags that imply headless mode.
+  return process.argv.some((arg) => arg === '-p' || arg === '--prompt');
 }