feat: add configuration validation for local LLM providers

Warn when using local LLM with OpenAI-only data vendors, suggest alternatives

tradingagents/dataflows/config.py

@@ -5,6 +5,38 @@ from typing import Dict, Optional
 _config: Optional[Dict] = None
 DATA_DIR: Optional[str] = None
 
+# Local LLM providers that don't support OpenAI's web_search_preview
+LOCAL_LLM_PROVIDERS = ["ollama", "lm studio"]
+# Methods that require OpenAI's web_search_preview tool
+OPENAI_ONLY_METHODS = ["get_news", "get_global_news", "get_fundamentals"]
+
+
+def validate_config(config: Dict):
+    """Validate configuration and warn about incompatible settings."""
+    llm_provider = config.get("llm_provider", "").lower()
+
+    if llm_provider in LOCAL_LLM_PROVIDERS:
+        # Check data vendors
+        data_vendors = config.get("data_vendors", {})
+        tool_vendors = config.get("tool_vendors", {})
+
+        warnings = []
+        if data_vendors.get("news_data") == "openai":
+            warnings.append("data_vendors.news_data")
+        if data_vendors.get("fundamental_data") == "openai":
+            warnings.append("data_vendors.fundamental_data")
+
+        for method in OPENAI_ONLY_METHODS:
+            if tool_vendors.get(method) == "openai":
+                warnings.append(f"tool_vendors.{method}")
+
+        if warnings:
+            print(f"WARNING: Using local LLM provider '{llm_provider}' with 'openai' data vendors.")
+            print(f"  The following settings use OpenAI's web_search_preview which is not available locally:")
+            for w in warnings:
+                print(f"    - {w}")
+            print(f"  Recommendation: Change these to 'alpha_vantage', 'google', or 'local'.")
+
 
 def initialize_config():
     """Initialize the configuration with default values."""
@@ -21,6 +53,7 @@ def set_config(config: Dict):
         _config = default_config.DEFAULT_CONFIG.copy()
     _config.update(config)
     DATA_DIR = _config["data_dir"]
+    validate_config(_config)
 
 
 def get_config() -> Dict: