addyosmani/agent-skills · skills/test-driven-development/SKILL.md

test-driven-development skillA

test-driven-development is agent-read markdown (skill) from addyosmani/agent-skills: Drives development with tests using the red-green-refactor loop. Use when implementing any logic, fixing any bug, or changing any behavior. Use when you need to prove that code works, when a bug report arrives, or when you're about to modify existing functionality..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add addyosmani/agent-skills/test-driven-development@git:20260907.cda4542
Exact content
mdr add addyosmani/agent-skills/test-driven-development@sha256:7c0c6ac057c19d7f

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_vwyc5vacuooqo7yp.svg)](https://markdownregistry.com/a/art_vwyc5vacuooqo7yp)

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Versions

versioncommittedcommitsizeaudit
git:20260907.cda4542 latest2026-09-07 cda4542 16,517 BA view · diff
git:20260807.91d4d072026-08-07 91d4d07 16,483 BA view · diff
git:20260719.2e493192026-07-19 2e49319 16,477 BA view · diff
git:20260507.b7653432026-05-07 b765343 14,976 BA view · diff
git:20260413.ad35cbf2026-04-13 ad35cbf 14,896 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (16517 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

GitHub

addyosmani/agent-skills · 95,786 stars · license MIT · pushed 2026-09-12 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_vwyc5vacuooqo7yp
GET https://markdownregistry.com/api/v1/resolve?ref=addyosmani/agent-skills/test-driven-development
GET https://markdownregistry.com/api/v1/blob/7c0c6ac057c19d7f8be65d9f49c3a638703b868f4625c78b70da5439d5d74fca

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.