a

core/storage/s3.py

@@ -80,6 +80,18 @@ def upload_file(local_path: str, bucket: str, key: str) -> None:
     s3.upload_file(local_path, bucket, key)
 
 
+def delete_objects(bucket: str, prefix: str) -> int:
+    """Delete all objects under a prefix. Returns count of deleted objects."""
+    s3 = get_s3_client()
+    objects = list_objects(bucket, prefix)
+    if not objects:
+        return 0
+
+    delete_keys = [{"Key": obj["key"]} for obj in objects]
+    s3.delete_objects(Bucket=bucket, Delete={"Objects": delete_keys})
+    return len(delete_keys)
+
+
 def get_presigned_url(bucket: str, key: str, expires: int = 3600) -> str:
     """Generate a presigned URL for an S3 object."""
     s3 = get_s3_client()