fix: cache list_all_params() to prevent RecursionError (fixes #25859)

Pre-compute DynamicPromptManagementParamLiteral values as a module-level
frozenset (DYNAMIC_PROMPT_MANAGEMENT_PARAMS) so the call site uses O(1)
membership checks instead of rebuilding a list on every loop iteration.

This follows the established pattern used by LIST_BATCHES_SUPPORTED_PROVIDERS
(types/utils.py line 3347) and _LITELLM_ROUTES_MEMBER_NAMES (route_checks.py).

No import cycle: DYNAMIC_PROMPT_MANAGEMENT_PARAMS is defined in types/utils.py
which litellm_logging.py already imports from (line 100). Adding one symbol to
an existing import block cannot create a circular dependency.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Signed-off-by: Yiyang Liu <yiyangliu@microsoft.com>

litellm/litellm_core_utils/litellm_logging.py

@@ -97,6 +97,7 @@ from litellm.types.utils import (
     CostBreakdown,
     CostResponseTypes,
     CustomPricingLiteLLMParams,
+    DYNAMIC_PROMPT_MANAGEMENT_PARAMS,
     DynamicPromptManagementParamLiteral,
     EmbeddingResponse,
     GuardrailStatus,
@@ -684,7 +685,7 @@ class Logging(LiteLLMLoggingBaseClass):
         eg. AnthropicCacheControlHook and BedrockKnowledgeBaseHook both don't require a `prompt_id` to be passed in, they are triggered by dynamic params
         """
         for param in non_default_params:
-            if param in DynamicPromptManagementParamLiteral.list_all_params():
+            if param in DYNAMIC_PROMPT_MANAGEMENT_PARAMS:
                 return True
 
         #############################################################################

litellm/types/utils.py

@@ -3601,6 +3601,11 @@ class DynamicPromptManagementParamLiteral(str, Enum):
         return [param.value for param in cls]
 
 
+DYNAMIC_PROMPT_MANAGEMENT_PARAMS: frozenset[str] = frozenset(
+    param.value for param in DynamicPromptManagementParamLiteral
+)
+
+
 class CallbacksByType(TypedDict):
     success: List[str]
     failure: List[str]

tests/test_litellm/litellm_core_utils/test_litellm_logging.py

@@ -36,6 +36,49 @@ def test_get_masked_api_base(logging_obj):
     assert type(masked_api_base) == str
 
 
+@pytest.mark.parametrize(
+    "non_default_params",
+    [
+        {"cache_control_injection_points": [{"location": "message", "index": -1}]},
+        {"knowledge_bases": ["kb-1"]},
+        {"vector_store_ids": ["vs-1"]},
+    ],
+)
+def test_should_run_prompt_management_hooks_without_prompt_id_for_dynamic_params(
+    logging_obj, non_default_params
+):
+    assert (
+        logging_obj.should_run_prompt_management_hooks(
+            non_default_params=non_default_params,
+            prompt_id=None,
+            tools=None,
+        )
+        is True
+    )
+
+
+@pytest.mark.parametrize(
+    "non_default_params",
+    [
+        {"temperature": 0.5},
+        {"max_tokens": 100},
+        {"temperature": 0.7, "top_p": 0.9, "max_tokens": 256},
+        {},
+    ],
+)
+def test_should_run_prompt_management_hooks_false_for_non_dynamic_params(
+    logging_obj, non_default_params
+):
+    assert (
+        logging_obj.should_run_prompt_management_hooks(
+            non_default_params=non_default_params,
+            prompt_id=None,
+            tools=None,
+        )
+        is False
+    )
+
+
 def test_sentry_sample_rate():
     existing_sample_rate = os.getenv("SENTRY_API_SAMPLE_RATE")
     try:

tests/test_litellm/types/test_types_utils.py

@@ -19,6 +19,27 @@ def test_hidden_params_response_ms():
     assert hidden_params_dict.get("_response_ms") == 100
 
 
+def test_dynamic_prompt_management_list_all_params_preserves_enum_order():
+    from litellm.types.utils import DynamicPromptManagementParamLiteral
+
+    assert DynamicPromptManagementParamLiteral.list_all_params() == [
+        "cache_control_injection_points",
+        "knowledge_bases",
+        "vector_store_ids",
+    ]
+
+
+def test_dynamic_prompt_management_params_frozenset():
+    from litellm.types.utils import DYNAMIC_PROMPT_MANAGEMENT_PARAMS
+
+    assert "cache_control_injection_points" in DYNAMIC_PROMPT_MANAGEMENT_PARAMS
+    assert "knowledge_bases" in DYNAMIC_PROMPT_MANAGEMENT_PARAMS
+    assert "vector_store_ids" in DYNAMIC_PROMPT_MANAGEMENT_PARAMS
+    assert "temperature" not in DYNAMIC_PROMPT_MANAGEMENT_PARAMS
+    assert "max_tokens" not in DYNAMIC_PROMPT_MANAGEMENT_PARAMS
+    assert isinstance(DYNAMIC_PROMPT_MANAGEMENT_PARAMS, frozenset)
+
+
 def test_chat_completion_delta_tool_call():
     from litellm.types.utils import ChatCompletionDeltaToolCall, Function