What do I need to use Excel Model?

What the model is; The inputs / assumptions; The outputs; Structure.

Is Excel Model free to use?

Yes — run it free in the browser playground (no API key needed for the sponsored trial, or bring any provider key), or install it into Claude Code, Cursor, ChatGPT and more via npx pm-claude-skills. MIT-licensed and open source.

Excel Model

Q: How do I know the Excel Model output is good?

The skill verifies itself against its own quality checks: Calculations are **live cell formulas**, not pasted static values; All driver assumptions live on one Inputs sheet and are referenced, not duplicated; Numbers are formatted (currency/percent/thousands) and sheets are readable; The script runs cleanly and the file opens in Excel/Sheets/Numbers.

🔵 Stable🕐 updated 2026-10-06 🔷 SkillSpec L3 ⚙ ships an executable helper pm-documents

Build a real, formula-driven Excel (.xlsx) model — not a static table. Use when asked to build an Excel model, a financial model, a budget/forecast spreadsheet, or any .xlsx with live formulas a user can edit. Produces an actual .xlsx file via a generated openpyxl script: an inputs/assumptions sheet, calculation sheets with real cell formulas, and formatting — so changing an input recalculates the model. Requires a code-execution environment (Claude Code, the API code tool, or Claude.ai).

▶ Run it free — no key needed 📝 Grade your existing draft ⬇ Add to Claude (works in Duet) 📱 Use as an app View SKILL.md ↗ What changed

🗣 Say this to your agent

“Build an Excel model.”“Build a financial model in Excel.”“Make a budget spreadsheet with live formulas.”“Make me an .xlsx forecast I can edit.”

What to give it

▸What the model is — financial model, budget, forecast, pricing model, scenario planner, etc.

▸The inputs / assumptions — the driver variables (and rough values) the user will change.

▸The outputs — what it should compute (revenue, burn, margins, totals, a P&L, etc.).

▸Structure — periods (months/years), tiers/segments, and any required layout.

✅ The bar it holds itself to

Every skill in this library self-verifies — these are this skill's own quality checks, straight from its definition.

✓Calculations are **live cell formulas**, not pasted static values

✓All driver assumptions live on one Inputs sheet and are referenced, not duplicated

✓Numbers are formatted (currency/percent/thousands) and sheets are readable

✓The script runs cleanly and the file opens in Excel/Sheets/Numbers

✓The user is told exactly which cells to change to drive the model

⚠️ What it refuses to do

Do not write computed results as static numbers — the whole point is that inputs recalculate

Do not hard-code an assumption inside a formula — put it on the Inputs sheet and reference it

Do not scatter inputs across sheets — one assumptions sheet, single source of truth

Do not skip formatting — an unformatted grid of numbers is hard to trust or use

Do not claim a file was produced if there was no code execution — fall back to a clear spec instead

Install

npx pm-claude-skills add --agent claude   # or codex · cursor · gemini · hermes
# or one-line MCP (every skill, any client):
claude mcp add pm-skills -- npx -y -p pm-claude-skills pm-claude-skills-mcp

Related skills

🔌 Embed this skill

Drop this on your blog, docs, or site — it renders a "Run this skill" card:

<div data-pm-skill="excel-model"></div>
<script src="https://mohitagw15856.github.io/pm-claude-skills/embed.js" async></script>

💬 Discussion

Excel Model is one of 1326 open-source professional AI agent skills — all SkillSpec L3. Try them all in the browser · ⭐ Star on GitHub · Browse the full catalog