diff --git a/litellm/cost_calculator.py b/litellm/cost_calculator.py
index 4f04fc471b5..80f4d1f2133 100644
--- a/litellm/cost_calculator.py
+++ b/litellm/cost_calculator.py
@@ -2768,7 +2768,9 @@ def handle_realtime_stream_cost_calculation(
         potential_model_names=potential_model_names,
         combined_usage_object=(
             RealtimeAPITokenUsageProcessor.collect_and_combine_usage_from_realtime_stream_results(
-                [event for event in results if event.get("type") != "response.event"]
+                [  # mutable-ok: collector requires a concrete event list
+                    event for event in results if event.get("type") != "response.event"
+                ]
             )
             if any(event.get("type") == "response.event" for event in results)
             else combined_usage_object
@@ -2832,7 +2834,7 @@ class _LiveBackendEnvelope(BaseModel):
 def _live_backend_responses(
     results: OpenAIRealtimeStreamList, logging_obj: LitellmLoggingObject | None = None
 ) -> tuple[ResponsesAPIResponse, ...]:
-    responses: Final = {
+    responses: Final = {  # mutable-ok: deduplicate terminal backend responses by response id
         response.id: response
         for result in results
         if result.get("type") == "response.event"
diff --git a/litellm/images/main.py b/litellm/images/main.py
index 662903ee35e..64bc5d9b382 100644
--- a/litellm/images/main.py
+++ b/litellm/images/main.py
@@ -870,7 +870,14 @@ def image_edit(
                     extra_body if isinstance(extra_body, dict) else None,
                 )
                 if image_edit_provider_config.use_multipart_form_data()
-                else {**non_default_params, **(extra_body if isinstance(extra_body, dict) else {})}
+                else {  # mutable-ok: image provider update requires a concrete request-parameter dict
+                    **non_default_params,
+                    **(
+                        extra_body
+                        if isinstance(extra_body, dict)
+                        else {}  # mutable-ok: empty fallback is consumed immediately
+                    ),
+                }
             )
 
         # Pre Call logging
diff --git a/litellm/litellm_core_utils/realtime_streaming.py b/litellm/litellm_core_utils/realtime_streaming.py
index f487e7513cf..850cfee2923 100644
--- a/litellm/litellm_core_utils/realtime_streaming.py
+++ b/litellm/litellm_core_utils/realtime_streaming.py
@@ -157,7 +157,12 @@ class RealTimeStreaming:
         self.messages: list[OpenAIRealtimeEvents] = []
         if account_usage and live_initialization_seconds > 0:
             self.messages.append(
-                {"type": "litellm.live.initialization", "usage": {"seconds": live_initialization_seconds}}
+                {  # mutable-ok: initialization event is appended to the mutable event history
+                    "type": "litellm.live.initialization",
+                    "usage": {  # mutable-ok: usage payload is consumed as part of the typed event
+                        "seconds": live_initialization_seconds,
+                    },
+                }
             )
         self._backend_sent_frames: bool = False
         self.input_message: dict = {}
diff --git a/litellm/proxy/proxy_server.py b/litellm/proxy/proxy_server.py
index 2f3210dad0d..25354b9fe40 100644
--- a/litellm/proxy/proxy_server.py
+++ b/litellm/proxy/proxy_server.py
@@ -12176,7 +12176,9 @@ async def realtime_websocket_endpoint(
     # Only use explicit parameters, not all query params
     query_params: Final = cast(
         RealtimeQueryParams,
-        dict(_realtime_query_params_template(model, intent) + ((("call_id", call_id),) if call_id is not None else ())),
+        dict(  # mutable-ok: FastAPI request query params must be materialized as a dict
+            _realtime_query_params_template(model, intent) + ((("call_id", call_id),) if call_id is not None else ())
+        ),
     )
 
     data: dict[str, object] = {
diff --git a/litellm/proxy/realtime_endpoints/endpoints.py b/litellm/proxy/realtime_endpoints/endpoints.py
index c1da14cb667..d66976d3e6f 100644
--- a/litellm/proxy/realtime_endpoints/endpoints.py
+++ b/litellm/proxy/realtime_endpoints/endpoints.py
@@ -362,9 +362,9 @@ async def create_realtime_client_secret(
     return RealtimeClientSecretResponse(**upstream_json)
 
 
-@router.post("/v1/live", tags=["realtime"])
-@router.post("/live", tags=["realtime"])
-@router.post("/openai/v1/live", tags=["realtime"])
+@router.post("/v1/live", tags=["realtime"])  # mutable-ok: FastAPI route metadata uses a mutable tag list
+@router.post("/live", tags=["realtime"])  # mutable-ok: FastAPI route metadata uses a mutable tag list
+@router.post("/openai/v1/live", tags=["realtime"])  # mutable-ok: FastAPI route metadata uses a mutable tag list
 async def proxy_live_calls(request: Request) -> Response:
     from litellm.proxy.realtime_endpoints.call_sessions import create_codex_realtime_call