Connector that other Datarails finance skills delegate to for the Excel-context guard / refresh / refresh-after-insert / drill-down patterns — not a response to a direct user request. Centralizes Excel-context detection (is a workbook open with the add-in bridge available?) and the financial-intent → command-name routing — the command catalog itself (parameters, timeouts, wait rules) is fetched from the running add-in via agent.get_skill, never hardcoded here. Finance skills delegate here at Step 0 (guard) and for refresh/drill instead of implementing Excel-context logic inline. It ORCHESTRATES the datarails-excel-agent bridge ("the agent") — it does not replace it, and it is not the datarails-finance-os MCP connector.