Data Dashboard (scene-layer on officecli-xlsx)

A dashboard is not "a spreadsheet with charts". It is a composition: one Dashboard sheet the user lands on with formula-driven KPI cards, cell-range-linked charts, sparklines, and semantic conditional formatting. Everything else (raw data, aggregations) is upstream infrastructure the user should never need to open. This skill teaches the composition pattern. Everything about the xlsx engine — cells, formulas, batch JSON, shell quoting, validate, HTML preview — comes from officecli-xlsx and is not re-taught here.

Setup

If officecli is missing:

• macOS / Linux: curl -fsSL https://d.officecli.ai/install.sh | bash
• Windows (PowerShell): irm https://d.officecli.ai/install.ps1 | iex

Verify with officecli --version (open a new terminal if PATH hasn't picked up). If install fails, download a binary from https://github.com/iOfficeAI/OfficeCLI/releases.

⚠️ Help-First Rule

When a prop name, enum value, or alias is uncertain, consult help before guessing.