tdd SKILL.md skillA
tdd from codeaholicguy/ai-devkit is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add codeaholicguy/ai-devkit/tdd@git:20260509.950097bPins git:20260509.950097b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- codeaholicguy/ai-devkit
- Path
skills/tdd/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260509.950097b, committed May 9, 2026
- First version recorded
- Apr 3, 2026
- Size
- 3,368 bytes
- Repository stars
- 1,661
- License
- Apache-2.0
AI DevKit · Test-driven development — write a failing test before writing production code. Use when implementing new functionality, adding behavior, or fixing bugs during active development.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# TDD Red. Green. Refactor. In that order, every time. ## Hard Rules - No production code without a failing test first. - If production code was written before its test, delete it and start over with a failing test. - Never skip the red step. A test that has never failed proves nothing. ## Cycle For each unit of behavior: 1. **Red** — Write a test for the next behavior. Run it. It must fail. Read the failure message — it should describe the missing behavior. 2. **Green** — Write the minimum production code to make the test pass. Nothing more. Run the test. Apply the `verify` skill. 3. **Refactor** — Clean up both test and production code. Run the test again. Still green? Done. Apply the `verify` skill. Then pick the next behavior and repeat. ## Rules for Each Step **Red:** - Test one behavior, not one function. Name the test after what the system should do, not what the function is called. - The test must fail for the right reason — a missing method, wrong return value, unmet condition. Not a syntax error or import failure. - If the test passes immediately, it's not testing new behavior. Delete it or pick a different behavior. **Green:** …
Read the whole file at its exact version.
How to install
mdr add codeaholicguy/ai-devkit/tdd@sha256:86b44ef491b0948bThe line at the top of this page pins the label git:20260509.950097b, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ziytsalek2v2ao7r)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Apr 3, 2026 and May 9, 2026, about one every 18 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260509.950097b latest | 2026-05-09 | 950097b | 3,368 B | A | view · diff |
| git:20260403.43eb83c | 2026-04-03 | 43eb83c | 3,355 B | A | view · diff |
| git:20260403.2d9440a | 2026-04-03 | 2d9440a | 3,363 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3368 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
codeaholicguy/ai-devkit · 1,661 stars · license Apache-2.0 · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ziytsalek2v2ao7r GET https://markdownregistry.com/api/v1/resolve?ref=codeaholicguy/ai-devkit/tdd GET https://markdownregistry.com/api/v1/blob/86b44ef491b0948b16ae86fec191c7e6c2dcc6b1c7540d747c011c1dba7f2262
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from codeaholicguy/ai-devkit
Every file in codeaholicguy/ai-devkit