tdd SKILL.md skillA
tdd from parcha-ai/parcha-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add parcha-ai/parcha-skills/tdd@git:20260915.3ff248bPins git:20260915.3ff248b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- parcha-ai/parcha-skills
- Path
tdd/skills/tdd/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260915.3ff248b, committed Sep 15, 2026
- First version recorded
- Sep 15, 2026
- Size
- 4,823 bytes
- Repository stars
- 123
- License
- MIT
Test-driven development. Use when the user wants to build features or fix bugs test-first, mentions "red-green-refactor", or wants integration tests.
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 TDD is the red → green loop. This skill is the reference that makes that loop produce tests worth keeping: what a good test is, where tests go, the anti-patterns, and the rules of the loop. Every section applies on every cycle: consult them before and during the loop, not after. When exploring the codebase, read `CONTEXT.md` (if it exists) so test names and interface vocabulary match the project's domain language, and respect ADRs in the area you're touching. ## What a good test is Tests verify behavior through public interfaces, not implementation details. Code can change entirely; tests shouldn't. A good test reads like a specification: "user can checkout with valid cart" tells you exactly what capability exists, and it survives refactors because it doesn't care about internal structure. See [references/tests.md](references/tests.md) for examples and [references/mocking.md](references/mocking.md) for mocking guidelines. ## Seams: where tests go A **seam** is the public boundary you test at: the interface where you observe behavior without reaching inside. Tests live at seams, never against internals. …
Read the whole file at its exact version.
How to install
mdr add parcha-ai/parcha-skills/tdd@sha256:52615cd0a9392912The line at the top of this page pins the label git:20260915.3ff248b, 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_uaz3hqkwfw5jjaaj)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, all committed on Sep 15, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260915.3ff248b latest | 2026-09-15 | 3ff248b | 4,823 B | A | view · diff |
| git:20260915.032c2e8 | 2026-09-15 | 032c2e8 | 4,810 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 (4823 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
parcha-ai/parcha-skills · 123 stars · license MIT · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_uaz3hqkwfw5jjaaj GET https://markdownregistry.com/api/v1/resolve?ref=parcha-ai/parcha-skills/tdd GET https://markdownregistry.com/api/v1/blob/52615cd0a9392912436dfaa8aa8b5f7a5014f00e43575a3822a4588a4f2a6946
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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