🧩 1. Overview
NexMind is an AI-powered business knowledge base and assistant. It allows businesses to upload internal documents and interact with them through a chat interface.
🌐 2. Tech Stack
| Layer | Technology |
|---|
| Frontend | React + Tailwind + shadcn/ui |
| Backend API | FastAPI (Python) or Node.js (Express) |
| Authentication | Clerk or Firebase Auth |
| File Storage | AWS S3 or Cloudinary |
| Database | PostgreSQL |
| Vector DB | Pinecone / Weaviate / Qdrant |
| AI Services | OpenAI GPT-4o / Embedding API |
| Hosting (Frontend) | Vercel / Netlify |
| Hosting (Backend) | Railway / Render / AWS Lambda |
📁 3. Key Modules
3.1 Document Ingestion
- Drag-and-drop uploader
- Integrations: Google Drive, Dropbox (later)
- Auto parser for:
- Store in S3, metadata in PostgreSQL
- Generate embeddings (OpenAI / local)
3.2 Vector Indexing
- Store document chunks in Pinecone/Weaviate
- Store
document_id, chunk_text, embedding, and metadata
3.3 Chat Interface
- Simple React chat UI
- Send user input to backend
- Backend fetches relevant chunks via vector search
- Construct context + query → send to GPT-4o
- Return and display answer
3.4 Role-Based Access
- Users: Owner, Admin, Team Member
- Assign access to documents
- Secure chat responses based on access control
3.5 Knowledge Update Monitor (Phase 2)
- Detect changed files
- Re-chunk + re-embed changed content
🔐 4. Authentication & User Management
- Email/password or Google Sign-In via Clerk
- Team workspaces
- Invite team members
- Manage document visibility per user
💬 5. OpenAI Integration
text-embedding-3-small or text-embedding-ada-002 for vector DB- GPT-4o for conversational response with context
- Prompt template includes:
- Business name
- Role of user (e.g., admin, staff)
- Retrieved chunks
- Query
🧪 6. MVP Milestones
| Phase | Features |
|---|
| Week 1-2 | Auth, file upload, chunking + embedding |
| Week 3-4 | Vector search, chat UI, GPT-4o integration |
| Week 5 | Team roles + document access |
| Week 6 | Polish UI, add waitlist/signup flow |
| Week 7+ | Beta launch to selected businesses |
🚀 7. Optional Enhancements (Post-MVP)
- Email forwarding for ingestion
- Browser extension (chat with your docs anywhere)
- Slack/Teams integration
- Feedback on responses
- Usage analytics & dashboard
- Custom AI fine-tuning per business
🔧 8. DevOps & Deployment
- GitHub + CI/CD with Vercel / Railway
- Error tracking: Sentry
- Monitoring: UptimeRobot / Grafana (advanced)
- Secrets management: Doppler / AWS Secrets Manager