create-sheet

# Create a workbook in open-sheet This skill owns the **workflow**. The technical reference — file contract, components, references, formats — lives in the **`sheet-authoring`** skill. Read it before writing code; do not duplicate its rules here. You only write files under `sheets/<id>/`. Never modify `package.json`, `open-sheet.config.ts`, or an existing workbook unless asked. ## Step 0 — Pick a theme List `themes/`. If any theme markdown exists, offer each theme id via `AskUserQuestion` plus a final **"no theme — design from scratch"** option. If the user picks one, read `themes/<id>.md` end to end, copy its palette and components, and set `meta.theme`. ## Step 1 — Get the numbers before anything else A spreadsheet is judged entirely on whether its numbers are right. Before structure, before layout, establish: - **Purpose** — what decision does this workbook support? A budget to approve, a forecast to argue with, a register to maintain? - **Audience** — a CFO wants assumptions they can change; an analyst wants the working; an ops team wants a list they can filter. - **The data** — where does it come from? Ask for the file, the query, the figures. If the user has none yet, build the structure and leave explicit `TODO:` markers. > **Never invent a figure.** Not a revenue number, not a growth rate, not a > headcount, not a "typical industry" benchmark. A fabricated number in a > spreadsheet is indistinguishable from a real one — it will be formatted, > totalled...