---
title: "Test-Driven Development (TDD) - Air Market"
description: "You are about to build a feature or fix a bug, and the tempting move is to start typing the code. This puts the test first instead: you describe what the change should do as a test, then write the co…"
canonical: "https://airmarket.ai/app/test-driven-development"
---

[Air Market](/) / [Developer Tools](/category/devtools) / Test-Driven Development (TDD)

Skill by [Jesse Vincent](/@obra)

# Test-Driven Development (TDD)

Write the failing test first, every feature and every fix

## What this does

You are about to build a feature or fix a bug, and the tempting move is to start typing the code. This puts the test first instead: you describe what the change should do as a test, then write the code that satisfies it. Reach for it at the very start of any implementation work, before there is code to test.

### Top 3 things it does for you

- Start a new feature with a test that fails
- Reproduce a bug in a test before fixing it
- Keep tests ahead of implementation code

## Information

**Test-Driven Development (TDD) at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [Jesse Vincent](/@obra) |
| Category | [Developer Tools](/category/devtools) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Languages | en |
| Size | 17 KB |
| Licence | MIT |
| Repository | [obra/superpowers](https://github.com/obra/superpowers/tree/3dcbd5c4b48e02263fbf4a3c01e3fe4f81d584d9/skills/test-driven-development) |
| GitHub stars | 314,834 (as of Nov 2026) |
| Installs | 276,087, counted by skills.sh (Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of Test-Driven Development (TDD) and recorded 0 findings and 2 flagged items. AIR's verdict: **safe**.

**What Test-Driven Development (TDD)'s check was run against**

|  |  |
| --- | --- |
| Commit | 3dcbd5c4b48e02263fbf4a3c01e3fe4f81d584d9 |
| Content hash | 3cc04b631b41a4a9d7e8c4e16cb6ef1ac1523b1200ef5df5d57c1f7787188bf8 |
| Files read | [Browse the files at this exact commit](https://github.com/obra/superpowers/blob/3dcbd5c4b48e02263fbf4a3c01e3fe4f81d584d9/skills/test-driven-development/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for Test-Driven Development (TDD)](/security/test-driven-development)

## About Test-Driven Development (TDD)

A test-driven development practice for implementation work. It applies at the point where you are about to add a feature or fix a bug, and it asks for the test before the implementation code.

Use it at the start of that work rather than after. The description scopes it to any feature or bugfix, so it is meant as the default opening move for implementation, not a step reserved for tricky changes.

## What's inside

- SKILL.md - instructions
- writing-good-tests.md - reference

## Questions

### Is Test-Driven Development (TDD) safe to install?

AIR scanned this exact version of Test-Driven Development (TDD) and recorded 0 findings and 2 flagged items. AIR's verdict: safe. The verdict is named by the content that was read, at commit 3dcbd5c4b48e, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/test-driven-development.

### How do I install Test-Driven Development (TDD)?

Open https://airmarket.ai/app/test-driven-development on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/obra/superpowers/tree/3dcbd5c4b48e02263fbf4a3c01e3fe4f81d584d9/skills/test-driven-development. Install from that link, not the branch.

## Related on Air Market

- [More Developer Tools listings](/category/devtools)
- [Everything by Jesse Vincent](/@obra)

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Canonical URL: <https://airmarket.ai/app/test-driven-development>