Create README.md

README.md

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+---
+title: CedroPM Bot
+emoji: 🤖
+colorFrom: blue
+colorTo: indigo
+sdk: docker
+pinned: false
+app_port: 7860
+---
+
+# PM-RAG-ChatBot
+
+A powerful RAG (Retrieval Augmented Generation) chatbot for querying Software Requirements Documents (SRDs) and project documentation. Built with Chainlit, Claude AI, and advanced document processing capabilities.
+
+## 🚀 Features
+
+- **📄 SRD Document Processing**: Upload and index PDF documents with intelligent section-aware text splitting
+- **🎨 Diagram Understanding**: Process diagrams using Claude Vision and/or Qwen2-VL vision models
+- **💬 Interactive Chat Interface**: Web-based chat interface powered by Chainlit
+- **🔍 Hybrid Search**: Combines dense vector search (semantic) and sparse search (BM25) with cross-encoder reranking
+- **📚 Multi-Project Support**: Manage multiple projects with isolated knowledge bases
+- **💾 Persistent Chat History**: SQLite database stores all conversations and messages
+- **🧠 Learning from Feedback**: Optional learning mode that improves responses based on user corrections
+- **🔐 User Isolation**: Multi-user support with strict data isolation per user, project, and chat
+- **⚡ Smart Intent Detection**: Automatically detects enumeration queries vs. regular Q&A
+- **📊 Table Extraction**: Extracts and indexes tables from PDF documents
+
+## 🏗️ Architecture
+
+The system uses a hybrid RAG architecture:
+
+1. **Document Ingestion**: PDFs are processed with section-aware splitting, preserving functional/non-functional requirement context
+2. **Vector Storage**: ChromaDB stores embeddings with metadata for filtering and scoping
+3. **Hybrid Retrieval**: 
+   - Dense retrieval using sentence transformers (all-MiniLM-L6-v2)
+   - Sparse retrieval using BM25
+   - Cross-encoder reranking (ms-marco-MiniLM-L-6-v2)
+4. **Answer Generation**: Claude Sonnet 4.5 generates context-aware answers
+5. **Vision Processing**: Optional diagram interpretation using Claude Vision or OCR
+
+## 📋 Prerequisites
+
+- **Python 3.8+**
+- **System Dependencies**:
+  - **Poppler** (for PDF to image conversion)
+    - Windows: Download from [poppler-windows releases](https://github.com/oschwartz10612/poppler-windows/releases/)
+    - Add `bin` folder to PATH or set `POPPLER_PATH` environment variable
+  - **Tesseract OCR** (optional, for OCR fallback)
+    - Windows: Download from [UB-Mannheim Tesseract](https://github.com/UB-Mannheim/tesseract/wiki)
+- **Anthropic API Key**: Get one from [Anthropic Console](https://console.anthropic.com/)
+
+## 🔧 Installation
+
+### 1. Clone the Repository
+
+```bash
+git clone <repository-url>
+cd PM-RAG-ChatBot