# Session: API Refactor - Error Handling
**Date:** 2026-01-19
**Started:** 10:00
**Last Updated:** 13:30

---

## Current State

Standardizing error handling across all API endpoints. Moving from ad-hoc try/catch to centralized error middleware.

### Completed
- [x] Created AppError class with status codes
- [x] Built global error handler middleware
- [x] Migrated `/users` routes to new pattern
- [x] Migrated `/products` routes

### Key Findings
- 47 endpoints with inconsistent error responses
- Some returning `{ error: message }`, others `{ message: message }`
- No consistent HTTP status codes

### Error Response Standard
```javascript
{
  success: false,
  error: {
    code: 'VALIDATION_ERROR',
    message: 'Email is required',
    field: 'email'  // optional, for validation errors
  }
}
```

### Notes for Next Session
- Migrate remaining routes: `/orders`, `/payments`, `/admin`
- Add error logging to monitoring service

### Context to Load
```
src/middleware/errorHandler.js
src/utils/AppError.js
```
