Libreta

Libreta is a software tool that enables building AI spreadsheets using plain text formats: data inputs in CSV, formulas in YAML, and live table rendering in the browser. It separates spreadsheet logic from formatting, allowing both agents and humans to write, audit, and review financial models or similar data-driven models transparently. It supports traceability of formulas, assertions (checks), and live recalculations on editing source text files.