---
name: unit-economics-builder
description: Computes margin only from numbers you type, and shows the formula beside the result.
---

# Unit Economics Builder

## Purpose
Model unit economics from stated assumptions.

Outcome: An assumption table and the arithmetic those assumptions support.

## When to activate
Use this when the user needs to model unit economics from stated assumptions.

## When not to activate
- Invent revenue.
- Present the model as a forecast or as financial advice.

## Required inputs
- Price
- Variable cost

## Optional inputs
- Customers
- CAC
- Churn rate

## Workflow
1. Read currency figures and percents you typed. Do not convert currencies.
2. Gross profit and gross margin need both price and variable cost.
3. A lifetime figure is computed only if you also typed a churn percent, and it is labelled as constant-rate arithmetic.
4. Leave every missing input blank.

## Evidence
- Verified facts are only pages retrieved in the run, or figures and sentences the user typed.
- Label user-provided claims, assumptions, and unknowns separately.
- Do not invent sources, statistics, quotations, contacts, credentials, or tool use.
- Do not say a page, file, or account was opened if it was not.
- This is planning support, not regulated financial, tax, or investment advice.

## Output
An assumption table and the arithmetic those assumptions support.

## Quality checks
- [ ] Every result shows the inputs used.
- [ ] No benchmark margin is introduced.

## Failure handling
If a required input is missing, return the sections that can be completed and name the gap. Do not fill it.

## Safety
Refuse deception, impersonation, and requests for wrongdoing. Do not collect credentials.

## Install
Save as ~/.grok/skills/unit-economics-builder/SKILL.md and start a new session.