Integrate Tools and LLMs (Claude Opus 4.1)

Enhance your `researcher` node to actually use `SerpAPI` for web searches. Modify `analyst` and `synthesizer` nodes to invoke `Claude Opus 4.1` for their respective tasks, ensuring structured prompts for analysis and report generation. Use `ChromaDB` as a temporary storage or lookup for retrieved documents. Configure your LangChain LLM instances with your Claude API key.

```python
from langchain_community.tools import SerpAPIWrapper
from langchain_anthropic import ChatAnthropic
from langchain_community.vectorstores import Chroma
from langchain_community.embeddings import HuggingFaceEmbeddings # Example for Chroma

# Initialize LLM and tools
llm = ChatAnthropic(model='claude-3-opus-20240229', temperature=0.7) # Ensure correct model name
search_tool = SerpAPIWrapper(serpapi_api_key='YOUR_SERPAPI_KEY')

# ... (modify researcher_node, analyst_node, synthesizer_node to use these) ...
```