054-design-tdd SKILL.md skillA
054-design-tdd from jabrena/plinth is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jabrena/plinth/054-design-tdd@v0.19.0Pins v0.19.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jabrena/plinth
- Path
skills/054-design-tdd/SKILL.md- Versions recorded
- 3
- Latest version
- v0.19.0, committed Sep 26, 2026
- First version recorded
- Jul 10, 2026
- Size
- 3,902 bytes
- Repository stars
- 461
- License
- Apache-2.0
Use when Java implementation work should be guided by Test-Driven Development, including maintaining a test list, choosing the next behavior, writing a failing test first, implementing only enough production code to pass, and refactoring while keeping tests green. This should trigger for requests such as Apply TDD; Use test-driven development; Drive this Java change with tests; Write the failing test first; Red-green-refactor this feature. Part of Plinth Toolkit.
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 Design Guide Java developers through Test-Driven Development for implementation work. **This is an interactive SKILL**. **What is covered in this Skill?** - Maintaining or refining a list of candidate test cases - Selecting the next useful behavior or test case before editing production code - Writing a failing test first to clarify the public interface, API shape, or usage of the code - Writing only enough functional production code to pass the selected test - Refactoring new and existing code while tests remain green - Adding newly discovered test cases to the list without losing the current TDD cycle - Reporting skipped checks, missing tests, and remaining risks when verification is incomplete ## Constraints Keep implementation work inside the red-green-refactor cycle, with one selected behavior driving each small change. - **MUST** read `references/054-design-tdd.md` before applying TDD guidance - **MUST** maintain or refine a test list when more than one behavior, edge case, or question is in scope - **MUST** select the next useful behavior or test case before writing production code …
Read the whole file at its exact version.
How to install
mdr add jabrena/plinth/054-design-tdd@sha256:ffb1e9b568deb8deThe line at the top of this page pins the label v0.19.0, 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_ujq3peiv7ezwxpn2)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jul 10, 2026 and Sep 26, 2026, about one every 39 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.19.0 latest | 2026-09-26 | 9569c35 | 3,902 B | A | view · diff |
| v0.18.0 | 2026-08-01 | 26b0e71 | 3,902 B | A | view · diff |
| v0.17.0 | 2026-07-10 | aaee915 | 3,902 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 (3902 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
jabrena/plinth · 461 stars · license Apache-2.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ujq3peiv7ezwxpn2 GET https://markdownregistry.com/api/v1/resolve?ref=jabrena/plinth/054-design-tdd GET https://markdownregistry.com/api/v1/blob/ffb1e9b568deb8de36ff0872dba6a65ff02ae54a3991403c37663e073f3c56e1
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.