A professional public-equity research operating system for evidence-based underwriting and portfolio decisions. Run Earnings Review, Business, Fair Value, Short Seller, Portfolio Fit and CIO Memo independently, including cold starts, or use governed Full Value and five-stage Full Analyse pipelines. Lean routing avoids duplicated instructions, proof-backed run receipts prevent unsupported validation, and persistence is verified by re-reading Current and Superseded states. It works in conversation and can optionally persist analyses to an existing Investment OS workspace or compatible database.