# Spec Delta

## Purpose

Garantiza que cambios posteriores al registro original de productores, productos y ventas sean explicables y aparezcan en la información exportada y reportada.

## ADDED Requirements

### Requirement: Editar registros operativos
The system SHALL allow editing producers, products, and sales from the application UI.

#### Scenario: Editar producto
- **WHEN** user edits a product and confirms with actor and reason
- **THEN** the product stores the new values
- **AND** the edit appears in the audit history

### Requirement: Auditoría obligatoria
The system SHALL require actor and non-empty reason for every edit and SHALL store before and after values with timestamp.

#### Scenario: Edición sin motivo
- **WHEN** user attempts to save an edit without actor or reason
- **THEN** the edit is not persisted
- **AND** an inline validation message identifies the missing data

### Requirement: Corrección de venta trazable
The system SHALL update inventory consistently when an existing sale is edited and SHALL preserve the original and corrected sale snapshots.

#### Scenario: Cambiar cantidad vendida
- **WHEN** user changes a sale line quantity with a valid audit reason
- **THEN** compensating inventory movement is recorded
- **AND** the audit entry identifies the original and new sale values