[DO NOT MERGE] Added ReAct single script agent

exp/README.md

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+## 📋 Prerequisites
+
+- Python 3.8+
+- OpenAI API key
+- Internet connection for research APIs
+
+## 🔧 Installation
+
+1. **Install dependencies**
+   ```bash
+   pip install -r requirements.txt
+   ```
+
+2. **Set up OpenAI API Key** (Optional - can be done at runtime)
+   ```bash
+   export OPENAI_API_KEY="your-openai-api-key-here"
+   ```
+
+## 🎯 Quick Start
+
+### Method 1: Interactive Mode
+
+```bash
+python main.py
+```
+
+The script will:
+
+1. Prompt for OpenAI API key (if not in environment)
+2. Ask for target directory for solution files
+3. Start solving the default MNIST problem
+
+### Method 2: Command Line with Directory
+
+```bash
+python main.py /path/to/solution/directory
+```
+
+## 🤖 How It Works
+
+The system uses three specialized agents in sequence:
+
+### 1. 🔍 Advisor Agent
+
+- Searches arXiv for relevant research papers
+- Queries Papers with Code for implementations
+- Summarizes findings and state-of-the-art approaches
+
+### 2. 📋 Planner Agent
+
+- Analyzes research findings
+- Creates detailed implementation plan
+- Specifies data preprocessing, model architecture, and evaluation strategy
+
+### 3. 💻 Developer Agent
+
+- Generates complete Python code based on the plan
+- Creates project structure using `mkdir`, `write_file`, `read_file`
+- Implements data handling, model training, and submission format