# CSV Knowledge Base Search Implementation

## Overview
The agent has been enhanced to prioritize searching a CSV knowledge base before using other tools. This ensures faster, more consistent responses for questions that have been previously answered.

## Key Changes Made

### 1. New CSV Search Tool (`agent.py`)
- **Function**: `search_csv_knowledge_base(query: str, top_k: int = 3)`
- **Technology**: Uses TF-IDF vectorization and cosine similarity for semantic search
- **Features**:
  - Searches through questions and answers in `supabase_docs.csv`
  - Returns top-k most similar results with similarity scores
  - Extracts questions and answers from the content format
  - Filters results by minimum similarity threshold (0.1)

### 2. Modified Agent Workflow (`agent.py`)
- **Priority System**: CSV search is now the first tool used for any question
- **Enhanced Assistant Function**: 
  - Automatically searches CSV before other tools
  - Uses CSV results as foundation for answers
  - Falls back to other tools if no relevant CSV results found
- **Tool Order**: CSV search tool is placed first in the tools list

### 3. Updated System Prompt (`system_prompt.txt`)
- **New Instructions**: Always start with CSV knowledge base search
- **Clear Priority**: CSV search is explicitly marked as first priority
- **Workflow**: Updated reasoning process to include CSV search as step 1

### 4. Dependencies (`requirements.txt`)
- **Added**: `scikit-learn` for TF-IDF vectorization and similarity calculations

## CSV File Structure
The CSV contains:
- **content**: Questions and answers in format "Question : [question text] Final answer : [answer]"
- **metadata**: Task metadata (not used in search)
- **embedding**: Vector embeddings (not used in current implementation)

## How It Works

### 1. User asks a question
### 2. Agent automatically searches CSV knowledge base first
```python
csv_result = search_csv_knowledge_base.invoke({
    'query': user_question, 
    'top_k': 3
})
```

### 3. If relevant results found:
- Uses CSV information as foundation
- May use additional tools for verification/supplementation
- Provides comprehensive answer

### 4. If no relevant results found:
- Proceeds with normal tool usage (web search, calculations, etc.)

## Benefits

✅ **Faster Responses**: No need to search external APIs for known questions
✅ **Consistency**: Same questions get same answers based on previous knowledge
✅ **Cost Efficiency**: Reduced API calls to external services
✅ **Accuracy**: Domain-specific questions answered from verified knowledge base
✅ **Fallback**: Still uses other tools when CSV doesn't have relevant information

## Testing

### Test Scripts Created:
1. **`test_csv_search.py`**: Tests CSV search functionality with various queries
2. **`demo_agent_workflow.py`**: Demonstrates complete agent workflow with CSV priority

### Example Results:
- Query: "Finding Nemo fish species invasive" → Found relevant answer about clownfish (34689)
- Query: "AI regulation arXiv June 2022" → Found answer about "egalitarian"
- Query: "What is the capital of France?" → No results, would use other tools

## Usage

The agent now automatically prioritizes CSV search. No changes needed in how you interact with it - just ask questions and the agent will:

1. Search CSV first
2. Use results if found
3. Fall back to other tools if needed
4. Provide comprehensive answers

This implementation ensures the agent leverages existing knowledge efficiently while maintaining the ability to research new information when needed.