This fills out those three-statement model templates you get handed in Excel, the ones where someone built the structure but left the cells blank. It knows the difference between Office JS (if you're running inside Excel) and Python/openpyxl (if you're generating a standalone file), writes actual formulas instead of hardcoded values, and steps through each statement with you for confirmation before moving on. The formatting defaults to a clean blue and grey palette, and it handles the usual supporting schedules like depreciation, working capital, and debt. The source is thorough on the formula-versus-values principle, which matters because hardcoded numbers break silently when assumptions change. Optional margin analysis and credit metrics if you ask for them.
npx skills add https://github.com/anthropics/financial-services-plugins --skill 3-statement-model