# [Product Name]

## What
[One paragraph: what this product does. Be concrete — "A CLI tool that converts CSV files to JSON" not "A data transformation solution".]

## Requirements
- [User can DO something specific and observable]
- [User can DO another specific thing]
- [System DOES something automatically]
- [Error case: system handles X gracefully]

## Technical Constraints
- Language: [Node.js / Python / Go / Rust / etc.]
- Framework: [Express / FastAPI / none / etc.]
- External dependencies: [list APIs, databases, services]
- Environment: [Node >= 22 / Python 3.12+ / etc.]

## Out of Scope
- [Explicit exclusion 1 — prevents scope creep]
- [Explicit exclusion 2]
