Three-statement model build plan (P&L, BS, CF) with checks

Create a three-statement financial model build plan for {company_name}.

Inputs:
- Historical financials: {historical_financials}
- Forecast drivers: {forecast_drivers}
- Debt and equity schedules: {capital_structure}
- Capex and depreciation assumptions: {capex_dep_assumptions}
- Working capital assumptions: {wc_assumptions}

Deliver:
1) Model architecture (inputs, calculations, outputs) and tab list.
2) Key schedules (revenue, COGS, opex, WC, capex, debt).
3) Integrity checks (balance sheet balancing, cash rollforward, circularity handling).
4) Output tables and scenario switch design.

Write it so a junior analyst could implement.