tdd SKILL.md skillA
tdd from sentimony/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add sentimony/skills/tdd@v0.0.15Pins v0.0.15 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- sentimony/skills
- Path
skills/tdd/SKILL.md- Versions recorded
- 14
- Latest version
- v0.0.15, committed Nov 7, 2026
- First version recorded
- Sep 10, 2026
- Size
- 16,283 bytes
- Repository stars
- 7
- License
- MIT
You MUST use this when implementing testable behavior changes - new features, bug fixes, or refactors with observable contracts. Covers writing meaningful failing tests before implementation and verifying behavior through the red-green-refactor cycle. Not for purely mechanical edits without behavior changes.
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: Test-Driven Development ## Purpose Use this skill to drive one concrete behavior into existence through a focused test-first cycle. The cycle is: ```text BEHAVIOR -> RED -> VERIFY RED -> GREEN -> VERIFY GREEN -> REFACTOR -> VERIFY GREEN ``` The test is evidence only when it observes the promised behavior at the right boundary and can fail for a meaningful defect. A green test is evidence only when its oracle proves the requirement rather than an implementation shape. This method is framework-neutral. Identify the repository's test tooling and delegate its commands and mechanics to the applicable project skill. ## Triggers Use this skill for: - new behavior and feature work; - bug fixes and regression tests; - refactors that must preserve behavior; - changes to APIs, state transitions, validation, authorization, persistence, or external adapters; - test changes whose oracle, boundary, mocks, setup, or determinism could be misleading. Route purely mechanical changes with no behavior to the appropriate project workflow. For generated output or configuration, apply TDD when the change has a behavior contract; otherwise use the project's direct verification convention. …
Read the whole file at its exact version.
How to install
mdr add sentimony/skills/tdd@sha256:8cf1520ecf6dd6f7The line at the top of this page pins the label v0.0.15, 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_ujg6z73fmvfarqpi)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 14 versions of this file, between Sep 10, 2026 and Nov 7, 2026, about one every 4 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.0.15 latest | 2026-11-07 | e2d7cec | 16,283 B | A | view · diff |
| v0.0.14 | 2026-11-04 | 6022530 | 16,055 B | A | view · diff |
| v0.0.13 | 2026-11-04 | efb8f2a | 15,885 B | A | view · diff |
| v1.1.3 | 2026-11-01 | 9838372 | 15,887 B | A | view · diff |
| git:20261010.ec93ad7 | 2026-10-10 | ec93ad7 | 15,908 B | A | view · diff |
| v1.0.7 | 2026-10-04 | 89f8fdb | 17,986 B | A | view · diff |
| v1.0.6 | 2026-10-01 | 832a9a8 | 17,989 B | A | view · diff |
| v1.0.5 | 2026-09-16 | 7451385 | 17,971 B | A | view · diff |
| v1.0.4 | 2026-09-14 | 14583c9 | 17,766 B | A | view · diff |
| v1.0.3 | 2026-09-14 | 736c5b7 | 16,013 B | A | view · diff |
| v1.0.2 | 2026-09-13 | 278c24a | 16,013 B | A | view · diff |
| v1.0.1 | 2026-09-13 | 5a3e6ba | 16,046 B | A | view · diff |
| v1.0.0 | 2026-09-10 | 81a397b | 16,056 B | A | view · diff |
| v1.0.0 | 2026-09-10 | 41e470d | 16,053 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 (16283 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
sentimony/skills · 7 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ujg6z73fmvfarqpi GET https://markdownregistry.com/api/v1/resolve?ref=sentimony/skills/tdd GET https://markdownregistry.com/api/v1/blob/8cf1520ecf6dd6f7c34443c908f420a472faf9b3e4c149a59af2f9a551e0a5e5
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 sentimony/skills
Every file in sentimony/skills