# Prisma Stock Model Implementation Spec

## Goal
Initialize Prisma ORM with SQLite database and create a Stock model to persist manually added stock tickers in the AITrader analyze route.

## Architecture
- **ORM**: Prisma with SQLite datasource
- **Database file**: `prisma/dev.db`
- **Model**: `Stock` with id, ticker, optional notes, and timestamps
- **Integration**: API routes for CRUD operations, integrated with analyze.tsx

## Design Decisions

### Stock Model Schema
```prisma
model Stock {
  id        String   @id @default(cuid())
  ticker    String   @unique
  notes     String?
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
}
```

**Rationale for `notes` field**: Included for future extensibility (user notes on watched stocks). Nullable to avoid breaking changes.

### Implementation Approach
- Single migration (`init`) for all model fields
- SQLite for development simplicity (matches plan)
- Prisma client singleton pattern for React Router 7 compatibility

## Files to Create/Modify

### Task 1: Initialize Prisma
- `prisma/schema.prisma` - Prisma schema with Stock model
- `prisma/dev.db` - SQLite database (generated)
- `prisma/migrations/..._init/migration.sql` - Initial migration (generated)

## Success Criteria
1. `prisma/schema.prisma` exists with valid Stock model
2. `npx prisma generate` completes without errors
3. `npx prisma migrate dev --name init` creates `prisma/dev.db`
4. Git commit created with prisma/ changes

## Dependencies to Install
- `prisma` (dev dependency)
- `@prisma/client` (runtime dependency)