# Spec Delta

## Purpose

Permite cargar rápidamente el inventario inicial desde archivos CSV locales, creando sólo las entidades que no existen y evitando duplicados por diferencias de formato en los nombres.

## ADDED Requirements

### Requirement: Importar inventario CSV
The system SHALL import CSV rows with product name, producer name, unit price, and optional quantity columns.

#### Scenario: Importación válida
- **GIVEN** a CSV with the required headers
- **WHEN** user previews and confirms the import
- **THEN** missing producers and products are created
- **AND** a positive quantity creates an initial inventory movement
- **AND** empty or zero quantity creates no movement

### Requirement: Comparación normalizada
The system SHALL match producer and product names ignoring case, accents, BOM, and redundant surrounding whitespace.

#### Scenario: Evitar duplicado
- **GIVEN** an existing producer `La Familia González`
- **WHEN** CSV contains ` la familia gonzalez `
- **THEN** the row uses the existing producer instead of creating a duplicate

### Requirement: Errores de importación
The system SHALL report invalid rows without persisting invalid records and SHALL show a summary of created, reused, skipped, and failed rows.

#### Scenario: Precio inválido
- **WHEN** a row has a non-numeric or negative price
- **THEN** that row is rejected with its line number and reason
- **AND** valid rows remain importable