Move API configuration constants to config.py

agent/config.py

@@ -1,5 +1,10 @@
 from typing import Literal
 
+API_BASE_URL = "https://openrouter.ai/api/v1"
+MODEL_NAME = "qwen/qwen3-235b-a22b-thinking-2507:floor"
+MODEL_TEMPERATURE = 0.7
+API_KEY_ENV_VAR = "OPENROUTER_API_KEY"
+
 def create_agent_config(app_name: str, thread_id: int) -> dict:
     """
     Create configuration for the agent.

agent/nodes.py

@@ -15,10 +15,8 @@ from langchain_core.messages import SystemMessage, HumanMessage
 from langgraph.prebuilt import ToolNode
 from langchain_core.rate_limiters import InMemoryRateLimiter
 
+from agent.config import API_BASE_URL, MODEL_NAME, API_KEY_ENV_VAR, MODEL_TEMPERATURE
 
-API_BASE_URL = "https://openrouter.ai/api/v1"
-MODEL_NAME = "openai/gpt-oss-120b"
-API_KEY_ENV_VAR = "OPENROUTER_API_KEY"
 if API_KEY_ENV_VAR not in os.environ:
     print(f"Please set the environment variable {API_KEY_ENV_VAR}.")
     os.environ[API_KEY_ENV_VAR] = getpass(f"Enter your {API_KEY_ENV_VAR} (will not be echoed): ")
@@ -46,6 +44,7 @@ def _get_model() -> BaseChatModel:
         api_key=SecretStr(api_key) if api_key else None,
         base_url=API_BASE_URL,
         model=MODEL_NAME,
+        temperature=MODEL_TEMPERATURE if MODEL_TEMPERATURE else 0.0,
         rate_limiter=_rate_limiter,
         metadata={
             "reasoning": {