principle-tdd SKILL.md skillA
principle-tdd from lugassawan/swe-workbench is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add lugassawan/swe-workbench/principle-tdd@git:20260828.71a6399Pins git:20260828.71a6399 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- lugassawan/swe-workbench
- Path
skills/principle-tdd/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260828.71a6399, committed Aug 28, 2026
- First version recorded
- Apr 21, 2026
- Size
- 4,687 bytes
- Repository stars
- 3
- License
- MIT
Test-Driven Development (TDD) — red-green-refactor, spec first, Arrange-Act-Assert; making tests fast and isolated; test doubles (mock, stub, fake, spy), mocking-as-design-feedback, outside-in vs inside-out TDD. Auto-load when implementing a feature TDD-style, fixing a bug with tests, or writing the test before the 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
<!-- preload-canary: SWB-PRELOAD-PRINCIPLE-TDD --> # Test-Driven Development ## The loop 1. **Red** — one failing test describing the next slice of behavior. Run it; confirm it fails for the right reason. 2. **Green** — simplest production code that passes. Hard-coding is allowed — it will be driven out by the next test. 3. **Refactor** — with all tests green, improve the code and the tests. Never refactor on red. Each cycle is minutes, not hours. ## Rule of three Duplication triggers refactor on the third occurrence. Two is coincidence; three is pattern. ## F.I.R.S.T. - **Fast** — milliseconds. - **Isolated** — independent of order and other tests. - **Repeatable** — deterministic anywhere. - **Self-validating** — automatic pass/fail. - **Timely** — written just before the production code. ## What counts as "refactor" *Structural improvement with all tests green — no new behavior.* - **Rename, extract, move** — anything that clarifies intent or repositions code to the layer that owns it. - **Never add behavior during refactor** — if a test turns red mid-refactor, revert the last step; the cycle was too large. …
Read the whole file at its exact version.
How to install
mdr add lugassawan/swe-workbench/principle-tdd@sha256:e9939c3602eabd76The line at the top of this page pins the label git:20260828.71a6399, 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_rikubj53p7ls3ugs)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Apr 21, 2026 and Aug 28, 2026, about one every 32 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260828.71a6399 latest | 2026-08-28 | 71a6399 | 4,687 B | A | view · diff |
| git:20260725.074b496 | 2026-07-25 | 074b496 | 4,799 B | A | view · diff |
| git:20260517.defa4c3 | 2026-05-17 | defa4c3 | 4,748 B | A | view · diff |
| git:20260421.35b6277 | 2026-04-21 | 35b6277 | 2,210 B | A | view · diff |
| git:20260421.54db3b9 | 2026-04-21 | 54db3b9 | 2,079 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 (4687 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
lugassawan/swe-workbench · 3 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_rikubj53p7ls3ugs GET https://markdownregistry.com/api/v1/resolve?ref=lugassawan/swe-workbench/principle-tdd GET https://markdownregistry.com/api/v1/blob/e9939c3602eabd76e42ec325cccfb4ffe3acefea4ea6b9399994e46ef41f8062
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.