fix(agent): make reasoning_effort a real Literal instead of a function call

`reasoning_effort: Literal[get_reasoning_efforts()]` is not valid typing.
Literal takes literal members, so every type checker rejects a call there,
and the annotation is evaluated when the class body runs -- which calls
get_reasoning_efforts(), and that function does `import litellm` to read the
values off litellm.completion's signature.

Spell the members out as a ReasoningEffort Literal and derive the tuple from
it with get_args, so the static type and the runtime tuple cannot disagree.
get_reasoning_efforts() is unchanged and still unions whatever the installed
litellm advertises, so no accepted value is narrowed.

Author: ayaangazali

swarms/structs/agent.py

@@ -101,7 +101,7 @@
 from swarms.utils.formatter import formatter
 from swarms.utils.generate_id import generate_id
 from swarms.utils.generate_keys import generate_api_key
-from swarms.utils.get_reasoning_efforts import get_reasoning_efforts
+from swarms.utils.get_reasoning_efforts import ReasoningEffort
 from swarms.utils.history_output_formatter import (
     history_output_formatter,
 )
@@ -391,7 +391,7 @@ def __init__(
         reasoning_prompt_on: bool = True,
         dynamic_context_window: bool = True,
         show_tool_execution_output: bool = True,
-        reasoning_effort: Literal[get_reasoning_efforts()] = None,
+        reasoning_effort: Optional[ReasoningEffort] = None,
         thinking_tokens: int = 1024,
         think_tool: bool = False,
         dynamic_tools: bool = True,

swarms/utils/get_reasoning_efforts.py

@@ -1,9 +1,8 @@
 import inspect
 from functools import lru_cache
-from typing import Tuple, get_args
+from typing import Literal, Tuple, get_args
 
-# Fallback set, unioned with installed litellm's values so supported efforts are never reduced.
-REASONING_EFFORTS: Tuple[str, ...] = (
+ReasoningEffort = Literal[
     "none",
     "minimal",
     "low",
@@ -13,7 +12,10 @@
     "ultra",
     "max",
     "None",
-)
+]
+
+# Fallback set, unioned with installed litellm's values so supported efforts are never reduced.
+REASONING_EFFORTS: Tuple[str, ...] = get_args(ReasoningEffort)
 
 
 @lru_cache(maxsize=1)