test-first-implementation SKILL.md skillA
test-first-implementation from stark-ai-de/agent-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add stark-ai-de/agent-skills/test-first-implementation@v0.1.0Pins v0.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- stark-ai-de/agent-skills
- Path
incubator/skills/engineering-workflows/test-first-implementation/SKILL.md- Versions recorded
- 1
- Latest version
- v0.1.0, committed May 21, 2026
- Size
- 3,062 bytes
- Repository stars
- 8
- License
- Apache-2.0
Implement behavior with a red-green-refactor loop, observable tests, and small vertical slices. Use when the user asks for TDD, test-first work, regression-first fixes, or a feature that needs clear behavior before 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
# Test-First Implementation ## Goal Drive implementation from observable behavior: write a failing test, make it pass with the smallest change, then refactor without changing behavior. ## When to use - The user asks for TDD, red-green-refactor, test-first implementation, or regression-first work. - A feature can be expressed as observable behavior, API output, UI state, CLI output, or integration behavior. - A bug fix should start with a failing regression test. ## When not to use - The repo has no runnable feedback loop and the user only needs a prototype. - The task is documentation-only or configuration-only. - The user explicitly asks for implementation without adding tests. ## Inputs to inspect - User story, acceptance criteria, bug reproduction, or expected behavior. - Existing tests, test helpers, fixtures, and package scripts. - `docs/agents/validation.md` when present. - Nearby production code only after selecting the behavior boundary. ## Workflow 1. Identify the smallest vertical behavior slice. 2. Choose the most stable observable test boundary; avoid testing private implementation details. 3. Write or update a test that fails for the right reason. …
Read the whole file at its exact version.
How to install
mdr add stark-ai-de/agent-skills/test-first-implementation@sha256:65ff574e437232a6The line at the top of this page pins the label v0.1.0, 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_yg3m5flvfgb27rha)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on May 21, 2026.
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 (3062 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
stark-ai-de/agent-skills · 8 stars · license Apache-2.0 · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yg3m5flvfgb27rha GET https://markdownregistry.com/api/v1/resolve?ref=stark-ai-de/agent-skills/test-first-implementation GET https://markdownregistry.com/api/v1/blob/65ff574e437232a6bbb7db7417962b4d77b2f779c89c00b7d0e75b504b121fc1
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.