From d4b0a77698cef9eee9c0bb6243048e5d38773553 Mon Sep 17 00:00:00 2001
From: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Date: Fri, 18 Sep 2026 04:45:24 +0000
Subject: [PATCH] fix(proxy): register bedrock batch output files with a file
 object so they list

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
---
 .../proxy/common_utils/check_batch_cost.py    | 21 ++++++++++-
 .../proxy_unit_tests/test_check_batch_cost.py | 36 +++++++++++++++++++
 2 files changed, 56 insertions(+), 1 deletion(-)

diff --git a/enterprise/litellm_enterprise/proxy/common_utils/check_batch_cost.py b/enterprise/litellm_enterprise/proxy/common_utils/check_batch_cost.py
index 13e9e5093a8..d12d2cc3dcb 100644
--- a/enterprise/litellm_enterprise/proxy/common_utils/check_batch_cost.py
+++ b/enterprise/litellm_enterprise/proxy/common_utils/check_batch_cost.py
@@ -2,6 +2,7 @@
 Polls LiteLLM_ManagedObjectTable to check if the batch job is complete, and if the cost has been tracked.
 """
 
+import time
 from dataclasses import replace as dataclasses_replace
 from datetime import datetime, timedelta, timezone
 from types import MappingProxyType
@@ -13,6 +14,7 @@ from litellm.constants import (
     MANAGED_OBJECT_STALENESS_CUTOFF_DAYS,
     MAX_OBJECTS_PER_POLL_CYCLE,
 )
+from litellm.types.llms.openai import OpenAIFileObject
 
 if TYPE_CHECKING:
     from prisma import models as prisma_models
@@ -41,6 +43,19 @@ TERMINAL_MANAGED_OBJECT_STATUSES: Final[Tuple[str, ...]] = (
 )
 
 
+def _batch_output_file_object(unified_file_id: str, raw_file_id: str, size_bytes: int) -> OpenAIFileObject:
+    filename: Final = raw_file_id.rsplit("/", 1)[-1] or raw_file_id
+    return OpenAIFileObject(
+        id=unified_file_id,
+        object="file",
+        purpose="batch_output",
+        filename=filename,
+        created_at=int(time.time()),
+        bytes=size_bytes,
+        status="processed",
+    )
+
+
 class CheckBatchCost:
     def __init__(
         self,
@@ -787,7 +802,11 @@ class CheckBatchCost:
                         )
                         await managed_files_hook.store_unified_file_id(
                             file_id=_unified_file_id,
-                            file_object=None,
+                            file_object=_batch_output_file_object(
+                                unified_file_id=_unified_file_id,
+                                raw_file_id=_raw_file_id,
+                                size_bytes=len(content_bytes) if _file_attr == "output_file_id" else 0,
+                            ),
                             litellm_parent_otel_span=None,
                             model_mappings={model_id: _raw_file_id},
                             user_api_key_dict=_minimal_auth,
diff --git a/tests/proxy_unit_tests/test_check_batch_cost.py b/tests/proxy_unit_tests/test_check_batch_cost.py
index 6417c7c8aa6..ec716e05925 100644
--- a/tests/proxy_unit_tests/test_check_batch_cost.py
+++ b/tests/proxy_unit_tests/test_check_batch_cost.py
@@ -23,6 +23,30 @@ _CLAIM_UNIFIED_BATCH_ID = "dW5pZmllZF9iYXRjaF9pZA=="
 _CLAIM_OUTPUT_FILE_ID = "file-output-123"
 
 
+def test_batch_output_file_object_derives_metadata():
+    from litellm_enterprise.proxy.common_utils.check_batch_cost import _batch_output_file_object
+
+    output_file = _batch_output_file_object(
+        unified_file_id="unified-output",
+        raw_file_id="s3://bucket/path/to/output.jsonl.out",
+        size_bytes=4321,
+    )
+    provider_file = _batch_output_file_object(
+        unified_file_id="unified-provider",
+        raw_file_id="file-abc",
+        size_bytes=0,
+    )
+
+    assert output_file.id == "unified-output"
+    assert output_file.object == "file"
+    assert output_file.purpose == "batch_output"
+    assert output_file.filename == "output.jsonl.out"
+    assert output_file.bytes == 4321
+    assert output_file.status == "processed"
+    assert provider_file.filename == "file-abc"
+    assert provider_file.bytes == 0
+
+
 def _batch_cost_result(
     cost: float,
     usage: dict,
@@ -1777,6 +1801,18 @@ class TestCheckBatchCost:
             raw_output_file_id: fake_managed_output_id,
             raw_error_file_id: fake_managed_error_id,
         }
+        for store_call in mock_hook.store_unified_file_id.call_args_list:
+            file_object = store_call.kwargs["file_object"]
+            assert file_object is not None
+            assert file_object.object == "file"
+            assert file_object.purpose == "batch_output"
+            assert file_object.id == store_call.kwargs["file_id"]
+        stored_file_objects = {
+            next(iter(c.kwargs["model_mappings"].values())): c.kwargs["file_object"]
+            for c in mock_hook.store_unified_file_id.call_args_list
+        }
+        assert stored_file_objects[raw_output_file_id].bytes == len(mock_file_content.content)
+        assert stored_file_objects[raw_error_file_id].bytes == 0
         assert mock_response.output_file_id == fake_managed_output_id
         assert mock_response.error_file_id == fake_managed_error_id