# Source notes

UI claims come from the packaged LocalFlux test and retained screenshots. Workbook claims come from direct inspection of `xl/sharedStrings.xml` and `xl/worksheets/sheet1.xml` inside each XLSX.

The article deliberately distinguishes file creation from semantic fidelity. It does not claim arbitrary delimiter, locale, encoding, or schema support. Only the three committed fixtures were tested; large files, embedded newlines, legacy encodings, TSV input, formulas, and malformed quoting were not exercised.