tdd SKILL.md skillA
tdd from bendrucker/claude is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add bendrucker/claude/tdd@git:20261020.56c0e8fPins git:20261020.56c0e8f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- bendrucker/claude
- Path
user/skills/tdd/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261020.56c0e8f, committed Oct 20, 2026
- First version recorded
- Aug 25, 2026
- Size
- 2,596 bytes
- Repository stars
- 18
- License
- MIT
Test-driven development. Use when building a feature or fixing a bug test-first, when the user asks for red-green-refactor, or when a change needs its tests written before its implementation.
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
# Test-Driven Development ## Seams A seam is where a module's interface lives: the place a caller observes behavior without reaching inside. Tests run at seams. Before writing any test, ask the user what the public interface is and which seams to test. Write no test at an unconfirmed seam. When the interface shape is itself in question, read [`LANGUAGE.md`](../improve-codebase-architecture/LANGUAGE.md) for the vocabulary: module, interface, implementation, depth, seam, adapter, locality. ## The Loop One seam, one test, one minimal implementation per cycle. 1. Write one failing test at a confirmed seam. Run it and confirm it fails for the reason you expect. 2. Write only enough code to pass it. Anticipate no later test and add no speculative feature. 3. Return to step 1 with what the cycle taught. Refactoring belongs to review, outside the loop: `code-review` for correctness, `simplify` for reuse and shape. The work is done when every confirmed seam has a test that failed before its implementation existed. ## What a Good Test Is …
Read the whole file at its exact version.
How to install
mdr add bendrucker/claude/tdd@sha256:df014de70bfe87a7The line at the top of this page pins the label git:20261020.56c0e8f, 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_iqsm2ukzug64dogz)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Aug 25, 2026 and Oct 20, 2026, about one every 28 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261020.56c0e8f latest | 2026-10-20 | 56c0e8f | 2,596 B | A | view · diff |
| git:20260902.42e53f9 | 2026-09-02 | 42e53f9 | 2,596 B | A | view · diff |
| git:20260825.3e5e9a4 | 2026-08-25 | 3e5e9a4 | 2,565 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 (2596 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
bendrucker/claude · 18 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_iqsm2ukzug64dogz GET https://markdownregistry.com/api/v1/resolve?ref=bendrucker/claude/tdd GET https://markdownregistry.com/api/v1/blob/df014de70bfe87a70a95db3b9b482a706c5f1c939fbb398dc2eb16566383ca21
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.
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