# Sprint 6 Report

## Implemented

- Excel-only `.xlsx` product imports;
- working sample workbook download;
- Products, Instructions, and Reference worksheets;
- enterprise product and supplier columns;
- workbook heading validation;
- row normalization and validation;
- duplicate SKU and barcode detection;
- preview before processing;
- persistent import and row history;
- downloadable Excel error report;
- transaction-safe confirmed processing;
- existing-SKU update behavior;
- automatic category, brand, supplier, and tax matching;
- bounded row inserts;
- cursor-based processing;
- import audit events;
- import permissions;
- import history interface;
- unit and route tests.

## Excluded

- CSV uploads;
- inventory quantity import;
- remote product-image URLs;
- partial commits after a failed confirmed import;
- mandatory Redis or queue dependency.

## Spreadsheet dependency

The implementation uses `phpoffice/phpspreadsheet:^5.9` directly. Production hosting must provide the required ZIP and GD PHP extensions.
