Use this skill when running headless (managed-agent
/ CMA mode) and you need to deliver an Excel workbook as a file
artifact rather than editing a live workbook via
mcp__office__excel_*.
./out/<name>.xlsx. Create
./out/ if it does not exist.Write a short Python script and run it with Bash. Use
openpyxl:
from openpyxl import Workbook
from openpyxl.styles import Font, PatternFill
wb = Workbook()
ws = wb.active; ws.title = "Inputs"
ws["B2"] = "Revenue"; ws["C2"] = 1_250_000_000
ws["C2"].font = Font(color="0000FF") # blue = hardcoded input
calc = wb.create_sheet("DCF")
calc["C5"] = "=Inputs!C2*(1+Inputs!C3)" # black = formula
wb.save("./out/model.xlsx")audit-xls)If mcp__office__excel_* tools are available (Cowork
plugin mode), use those instead — they drive the user's live workbook
with review checkpoints. This skill is the file-producing fallback for
headless runs.