A plain-table grid over a hand-rolled, zero-dependency workbook core: import CSV, edit cells, write formulas, navigate with the keyboard, select ranges, and digest a selection into a manifest fragment for downstream verifiable-compute pipelines.
WorkbookCSVZero PIIClient-Side
Scope & reliance: 🔒 All inputs are processed locally in your browser. No data is transmitted. Do not enter real personal data: use synthetic or anonymised inputs only. This is a basic workbook for agents and humans feeding a verifiable-compute pipeline, not an Excel replacement. CSV only. Deterministic logic, zero PII, CC BY 4.0.