diff --git a/scripts/run_audit_generator_local.py b/scripts/run_audit_generator_local.py
index 748e3f89..ab0215c8 100644
--- a/scripts/run_audit_generator_local.py
+++ b/scripts/run_audit_generator_local.py
@@ -1,18 +1,21 @@
 """
-Run audit_generator locally. Writes XLSX to ./local_output/ instead of S3.
+Run audit_generator locally.
 
 Usage:
     cd /workspaces/model
-    python scripts/run_audit_generator_local.py <hubspot_deal_id>
+    python scripts/run_audit_generator_local.py [<hubspot_deal_id>]
+
+Prompts for deal ID and S3 destination (local file or real S3) if not supplied.
 """
 
 from __future__ import annotations
 
 import os
 import sys
-from io import BytesIO
 from pathlib import Path
-from typing import Any
+from typing import Any, Union
+
+import boto3
 
 # Load .env before importing infra modules
 from dotenv import load_dotenv
@@ -21,6 +24,7 @@ load_dotenv(Path(__file__).parent.parent / "backend" / ".env")
 
 from infrastructure.postgres.config import PostgresConfig
 from infrastructure.postgres.engine import make_engine, make_session
+from infrastructure.s3.s3_client import S3Client
 from orchestration.audit_generator_orchestrator import AuditGeneratorOrchestrator
 from orchestration.audit_generator_unit_of_work import AuditGeneratorUnitOfWork
 
@@ -46,9 +50,19 @@ class _LocalS3Client:
         return str(dest)
 
 
+def _make_s3_client() -> Union[S3Client, "_LocalS3Client"]:
+    use_real = input("Use real S3? [y/N]: ").strip().lower() == "y"
+    if use_real:
+        bucket = "retrofit-energy-assessments-dev"
+        boto3_client: Any = boto3.client
+        return S3Client(boto_s3_client=boto3_client("s3"), bucket=bucket)
+    output_dir = Path(__file__).parent.parent / "local_output"
+    return _LocalS3Client(output_dir)
+
+
 def main() -> None:
     deal_id = sys.argv[1] if len(sys.argv) > 1 else input("hubspot_deal_id: ").strip()
-    output_dir = Path(__file__).parent.parent / "local_output"
+    s3_client = _make_s3_client()
 
     engine = make_engine(PostgresConfig.from_env(os.environ))
 
@@ -60,7 +74,7 @@ def main() -> None:
 
     AuditGeneratorOrchestrator(
         hubspot_deal_id=deal_id,
-        s3_client=_LocalS3Client(output_dir),  # type: ignore[arg-type]
+        s3_client=s3_client,  # type: ignore[arg-type]
         uow_factory=uow_factory,
     ).run()