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test-driven-development SKILL.md skillA

test-driven-development from intent-driven-dev/intent-driven-template is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add intent-driven-dev/intent-driven-template/test-driven-development@git:20260823.edc50a0

Pins git:20260823.edc50a0 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: intent-driven-dev/intent-driven-template
Path: .agents/skills/test-driven-development/SKILL.md
Versions recorded: 1
Latest version: git:20260823.edc50a0, committed Aug 23, 2026
Size: 1,618 bytes
Repository stars: 188
License: MIT

Use when implementing a change with test-driven development (TDD): work test-first through focused red-green cycles.

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

Use the repository's existing test tooling and conventions.

One test, one behaviour, one reason to fail. A test name describes that one
behaviour; never use joiners such as "and", "or", or "etc." to combine
independent outcomes. Multiple assertions are acceptable only when together
they establish that same behaviour.

## Red

- Select one observable behaviour from the requirement.
- Write one test before changing implementation code.
- Run the test and confirm it fails because the behaviour is missing, not because the test is broken.

## Green

- Write only enough implementation code to pass the failing test.
- Run the test, then run the relevant suite.
- Do not add behaviour without first seeing its test fail.

## Refactor

- Refactor only while the relevant suite is green, after completing a red-green slice.
- Refactor either the tests or the implementation in one pass, not both.
- Reuse shared setup, teardown, helpers, and parameterized structure when they clarify intent without combining behaviours.
- Rerun the relevant suite after each refactor pass.

## Patterns and anti-patterns
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add intent-driven-dev/intent-driven-template/test-driven-development@sha256:8687c3dcc1d00380

The line at the top of this page pins the label git:20260823.edc50a0, 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.

Badge

[![mdr](https://markdownregistry.com/badge/art_2yk4dc7qqe5bgpmn.svg)](https://markdownregistry.com/a/art_2yk4dc7qqe5bgpmn)

3 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Aug 23, 2026.

version	committed	commit	size	audit
git:20260823.edc50a0 latest	2026-08-23	edc50a0	1,618 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the 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 (1618 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

intent-driven-dev/intent-driven-template · 188 stars · license MIT · pushed 2026-10-15 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_2yk4dc7qqe5bgpmn
GET https://markdownregistry.com/api/v1/resolve?ref=intent-driven-dev/intent-driven-template/test-driven-development
GET https://markdownregistry.com/api/v1/blob/8687c3dcc1d003801d103c66c84cb3afae77b93a309a37f240b1df55f76b3465

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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