# Founder Cfo

Your CFO.

- Repository: https://github.com/Jakeschincariol/founder-skill (2314 stars)
- Category: Business
- License: MIT
- Last updated: 2026-10-07
- Runs scripts: yes, review before use

## Install

Claude Code: `npx skills add Jakeschincariol/founder-skill --skill founder-cfo -g -a claude-code -y`
Codex: `npx skills add Jakeschincariol/founder-skill --skill founder-cfo -g -a codex -y`
Cursor: `npx skills add Jakeschincariol/founder-skill --skill founder-cfo -g -a cursor -y`
Gemini CLI: `npx skills add Jakeschincariol/founder-skill --skill founder-cfo -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add Jakeschincariol/founder-skill`

## Description

Your CFO. Builds the unit economics of a business before money is spent: what one unit earns after its direct costs, the real profit margin at the planned volume, the break-even point in units a day, year 1 month by month, the cash needed before it pays for itself, how long the startup spend takes to earn back, and what happens if the price drops, sales come in low or costs rise. Every number traces to an input the user can check. Use when the user says "find the profit margins", "do the numbers", "is this profitable", "break-even", "unit economics", "how much do I need to start", or "run the CFO".

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# founder-cfo

The person who asks "and what does that cost?" Margins decide whether a good idea
is a business. This skill finds them, with every number traceable to an input.

Tool in this folder:

```bash
python3 "${CLAUDE_SKILL_DIR}/unit_economics.py" founder/numbers.json --out founder/cfo.md
```

## Step 1: gather the inputs

Write `founder/numbers.json` (shape: `example.json` in this folder, a walk-in
matcha café). It needs:

| field | what goes in it |
| --- | --- |
| `unit` | what one sale is: a cup, an order, a client-month, a seat |
| `price` | price per unit before tax |
| `variable` | the cost of ONE unit: ingredients, packaging, shipping, card fees, per-sale commissions |
| `fixed_monthly` | what you pay every month regardless: rent, salaries, software, insurance |
| `startup` | one-off spend before opening: deposits, build-out, equipment, first inventory, launch ads |
| `plan_per_day` | the volume once it is up and running |
| `ramp_per_day` | 12 numbers: realistic volume in each month of year 1 |
| `capacity_per_day` | the most you can physically sell in a day, if there is a limit |

Where the numbers come from, in this order:

1. The user's own quotes, invoices, leases and supplier price lists.
2. Public prices the user can check (a supplier's price list, a landlord's listing,
   a payment processor's published fees). Write the source next to the number in
   `founder/cfo-sources.md`.
3. Your estimate, clearly marked as an estimate, with the reasoning. Never present
   an estimate as a fact.

Ask the user for anything only they know (rent quoted, wages they will pay). Use the
price from `founder/pricing.md` or `founder/pitch.md` if those exist.

**The ramp is where plans lie.** Month 1 is almost never the plan volume. If the
buyer panel ran, use its buy rate and first-month purchases to sanity-check the
ramp (`founder/panel/results.md`), and say how you did it.

## Step 2: run it

The rest: https://github.com/Jakeschincariol/founder-skill/blob/HEAD/skills/founder-cfo/SKILL.md