What problem does it solve? Building a fully-linked Income Statement, Balance Sheet, and Cash Flow model in Excel is error-prone: hardcoded values break when assumptions change, statements fail to tie, and balance checks silently drift. This Skill produces formula-driven .xlsx models where cash and retained earnings tie out across all three statements. ## Core Features & Use Cases - Formula-First Model Building: Writes Excel formula strings via openpyxl instead of computed values, so the model flexes when scenario toggles or assumption drivers change. - Integrated Schedules: Builds working capital, D&A roll-forward, debt, NOL, and retained earnings schedules that feed the three statements with verified linkages. - Built-In Audit Checks: Includes balance sheet balance, cash tie-out, RE roll-forward, scenario hierarchy, and credit metric threshold checks with a master pass/fail status. - Use Case: Ask the agent to build a 5-year projection model for a company from its 10-K filings; it extracts historicals from SEC EDGAR, populates the Assumptions tab, and delivers a balanced model with a Checks dashboard. ## Quick Start Build a 3-statement model in Excel for this company using the attached historical financials, with base, upside, and downside scenarios.