tdd SKILL.md skillA
tdd from yeachan-heo/oh-my-claudecode is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add yeachan-heo/oh-my-claudecode/tdd@git:20261009.7b270a4Pins git:20261009.7b270a4 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- yeachan-heo/oh-my-claudecode
- Path
skills/tdd/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261009.7b270a4, committed Oct 9, 2026
- First version recorded
- Feb 21, 2026
- Size
- 2,101 bytes
- Repository stars
- 40,148
- License
- MIT
Test-first at pre-agreed seams — one test, one implementation, tracer-bullet red/green; independent expected values; substitutions only at the seam's boundary class; launch Phase 4 reference.
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 in small steps, at seams that were agreed in advance. In a launch run the seam list is C2's approved output; outside launch, agree the seams with the user before the first test exists — a seam nobody approved gets no tests. ## The loop One test → one implementation → repeat: 1. Write the next test at a seam. Run it. Watch it fail for the reason you expect — a test that cannot fail is not a test. 2. Implement the smallest change that turns it green. 3. Repeat. Each test is a tracer bullet: a narrow but complete path through the behavior, not a layer finished in isolation. ## Rules - Expected values come from an independent source of truth — a spec line, a worked example, a documented output. Never from the implementation under test: a test that asserts what the code happens to do is a mirror, not a check. - Substitute at the seam's declared boundary class only — in-process, locally substitutable, owned-remote port, or true-external, the class C2 records for each seam. No substitutes inside the boundary the test is exercising. - Refactoring is not part of the loop. It belongs to the review stage; the repair worker owns it. Do not refactor mid-red-green. …
Read the whole file at its exact version.
How to install
mdr add yeachan-heo/oh-my-claudecode/tdd@sha256:b7270923ba707d93The line at the top of this page pins the label git:20261009.7b270a4, 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_f3q4rgmvxqx2eksw)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Feb 21, 2026 and Oct 9, 2026, about one every 57 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261009.7b270a4 latest | 2026-10-09 | 7b270a4 | 2,101 B | A | view · diff |
| git:20260925.570ed1c | 2026-09-25 | 570ed1c | 1,924 B | A | view · diff |
| git:20260223.9194af7 | 2026-02-23 | 9194af7 | 2,595 B | A | view · diff |
| git:20260222.e4a0c1a | 2026-02-22 | e4a0c1a | 2,850 B | A | view · diff |
| git:20260221.b93fe08 | 2026-02-21 | b93fe08 | 2,684 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 (2101 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
yeachan-heo/oh-my-claudecode · 40,148 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_f3q4rgmvxqx2eksw GET https://markdownregistry.com/api/v1/resolve?ref=yeachan-heo/oh-my-claudecode/tdd GET https://markdownregistry.com/api/v1/blob/b7270923ba707d934ef7e039579825e46c7855d6cdc1a1ab97ad576cb86490c8
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 yeachan-heo/oh-my-claudecode
Every file in yeachan-heo/oh-my-claudecode