git:20260824.da779f9 to git:20260824.dfd64f3

---

{

"name": "implement",

"description": "Turn a spec or plan into working code, one vertical slice at a time. Use when a spec or plan exists and needs implementation, or converting design decisions into code.",

"credit": "Matt Peacock (mattpocock/skills)"

}

---

# Implement

Turn a spec or plan into working code, one vertical slice at a time.

## Process

1. **Read the spec** — Understand what needs to be built.

2. **Identify the first vertical slice** — One test → one implementation.

3. **Write the failing test** — Red.

4. **Write minimal code to pass** — Green.

5. **Refactor if needed** — But only after green.

6. **Repeat** — Next slice.

## Rules

- One vertical slice at a time.

- Test-first: always red before green.

- Don't anticipate future slices.

- Keep each slice demoable on its own.

## Credit

This skill is based on the work of **Matt Peacock** ([@mattpocock](https://github.com/mattpocock)). Original source: [mattpocock/skills](https://github.com/mattpocock/skills). Licensed under MIT.