Add README.md

README.md

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-<LOCAL_CONTENT>
+# RAG Agent Project
+
+## Installation
+```bash
+python -m venv .venv
+source .venv/bin/activate
+pip install -r requirements.txt
+```
+
+## Environment Variables
+- `OPENAI_API_KEY` – API key for OpenAI or Ollama. If using local Ollama set `OPENAI_API_BASE_URL=http://localhost:11434/v1`.
+
+## Usage
+### Load documents into vector store
+```bash
+python init_loader.py /path/to/text/files
+```
+
+### Start interactive CLI
+```bash
+python cli_client.py /add --text "Your document content"
+python cli_client.py /search --text "What is LangChain?"
+python cli_client.py /quit
+```
+
+### Run agent directly
+```bash
+python agent.py
+```
+
+## Development
+- Tests are not included but can be added in `tests/`.
+- Lint with `ruff .` and format with `black .`.