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comparaison/README.md

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# ComparAIson
**AI-Powered Deep Research Comparison Platform**
Compare anything with intelligent, multi-dimensional analysis. ComparAIson uses LLM-powered research to generate comprehensive, visual comparisons — then saves them as shareable posts on your profile.
## Features
- **Deep Research Engine** — Multi-provider LLM pipeline (Tavily search → Perplexity/OpenAI synthesis) with automatic fallback
- **Interactive Visualizations** — Radar charts, grouped bar charts, feature comparison tables, score cards, pros/cons breakdowns
- **Real-Time Streaming** — Watch research progress live via Server-Sent Events
- **User Profiles** — Save comparisons to your profile, browse a public feed
- **Self-Hosted** — Docker Compose deployment, runs on a Raspberry Pi
## Tech Stack
| Layer | Technology |
|---|---|
| Framework | Next.js 15 (App Router, Server Components, Server Actions) |
| Language | TypeScript |
| Database | PostgreSQL 16 |
| ORM | Drizzle ORM |
| Auth | Better Auth (email + password) |
| UI | Tailwind CSS + shadcn/ui |
| Charts | Recharts |
| LLM | OpenAI GPT-4o-mini + Tavily Search + Perplexity Sonar |
| Deployment | Docker Compose + Traefik reverse proxy |
## Quick Start
### Prerequisites
- Node.js 20+
- PostgreSQL 16+ (or Docker)
- At least one LLM API key
### 1. Clone & Install
```bash
git clone https://gitea.tophermayor.com/TopherMayor/comparaison.git
cd comparaison
npm install
```
### 2. Configure Environment
```bash
cp .env.example .env.local
# Edit .env.local with your API keys and database URL
```
Required environment variables:
| Variable | Description | Required |
|---|---|---|
| `DATABASE_URL` | PostgreSQL connection string | Yes |
| `BETTER_AUTH_SECRET` | Random secret for session signing | Yes |
| `OPENAI_API_KEY` | OpenAI API key (GPT-4o-mini) | Yes* |
| `TAVILY_API_KEY` | Tavily search API key | Recommended |
| `PERPLEXITY_API_KEY` | Perplexity Sonar API key | Optional |
| `NEXT_PUBLIC_APP_URL` | Public URL of the app | Yes |
*At minimum, one LLM provider key is required. OpenAI works standalone; Tavily adds web search; Perplexity adds cheaper synthesis.
### 3. Database Setup
```bash
# Generate migration
npx drizzle-kit generate
# Run migration
npx drizzle-kit migrate
```
### 4. Development
```bash
npm run dev
# App runs at http://localhost:3000
```
### 5. Docker Deployment
```bash
docker compose up -d
```
## Project Structure
```
src/
├── app/
│ ├── (auth)/ # Auth route group
│ │ ├── sign-in/ # Sign in page
│ │ └── sign-up/ # Sign up page
│ ├── (main)/ # Main app route group (with nav)
│ │ ├── compare/ # Comparison input + results
│ │ ├── explore/ # Public comparisons feed
│ │ └── profile/ # User profile + saved comparisons
│ ├── api/
│ │ ├── auth/[...all]/ # Better Auth catch-all
│ │ └── compare/ # SSE streaming research endpoint
│ ├── layout.tsx # Root layout
│ └── page.tsx # Landing page
├── components/
│ ├── comparison/ # Visualization components
│ │ ├── radar-chart.tsx
│ │ ├── bar-chart.tsx
│ │ ├── comparison-table.tsx
│ │ ├── score-card.tsx
│ │ └── pros-cons-card.tsx
│ └── ui/ # shadcn/ui components
├── hooks/
│ └── use-comparison-stream.ts # SSE streaming hook
├── lib/
│ ├── auth.ts # Better Auth server config
│ ├── auth-client.ts # Better Auth client
│ ├── db/
│ │ ├── index.ts # Drizzle client
│ │ └── schema.ts # Database schema
│ ├── llm/
│ │ ├── index.ts # Research pipeline orchestrator
│ │ ├── types.ts # LLM type definitions
│ │ └── providers/
│ │ ├── index.ts # Provider fallback chain
│ │ ├── openai.ts # OpenAI GPT-4o-mini provider
│ │ ├── tavily.ts # Tavily search provider
│ │ └── perplexity.ts # Perplexity Sonar provider
│ ├── types.ts # Shared type definitions
│ └── utils.ts # Utility functions
└── middleware.ts # Auth middleware + route protection
```
## Architecture
See [docs/architecture.md](docs/architecture.md) for detailed architecture documentation.
## API Reference
See [docs/api-reference.md](docs/api-reference.md) for endpoint documentation.
## UI/UX Flow
See [docs/ui-ux-flow.md](docs/ui-ux-flow.md) for user journey and wireframe descriptions.
## License
MIT