typedsheet

Use the repository SDD workflow for non-trivial behavior, architecture, protocol, persistence, or test changes. Create or update work-item specs under `docs/spec/` before implementation and keep baseline specs synchronized when lasting rules change.

Edit and validate `.xlsx` workbooks through the `fastxlsx` CLI. Use for config-table updates, structured-sheet edits, sheet management, style changes, and roundtrip-safe workbook modifications instead of touching workbook XML directly.

Edit and validate `.xlsx` workbooks through the `fastxlsx` CLI. Use for config-table updates, structured-sheet edits, sheet management, style changes, and roundtrip-safe workbook modifications instead of touching workbook XML directly.

Edit and validate `.xlsx` workbooks through the `fastxlsx` CLI. Use for config-table updates, structured-sheet edits, sheet management, style changes, and roundtrip-safe workbook modifications instead of touching workbook XML directly.