Worked on enhancing reliability in the InvoicePlane/InvoicePlane repository by addressing a bug in currency formatting logic. Focused on backend development using PHP, the work involved implementing a defensive fix within helper functions to ensure the thousands separator replacement in the standardize_amount method only occurred when appropriate. This adjustment prevented empty-string warnings and improved the accuracy of currency display, particularly for compact number formats across different locales. By refining edge-case handling in number_helper.php, the changes reduced formatting errors in invoices and reports, contributing to more robust internationalization and lowering the likelihood of support issues related to financial data presentation.