test-driven-development SKILL.md skillA
test-driven-development from taracodlabs/aiden is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add taracodlabs/aiden/test-driven-development@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- taracodlabs/aiden
- Path
skills/test-driven-development/SKILL.md- Versions recorded
- 2
- Latest version
- v1.0.0, committed Apr 17, 2026
- First version recorded
- Apr 17, 2026
- Size
- 4,594 bytes
- Repository stars
- 875
- License
- AGPL-3.0
Write software using the RED-GREEN-REFACTOR cycle for reliable, well-tested code.
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) Use the RED-GREEN-REFACTOR cycle to write reliable, well-tested software. Write tests first, then write the minimal code to pass them, then clean up. ## When to Use - User wants to implement a new function or module correctly - User wants to ensure edge cases are handled before they become bugs - User is refactoring and wants a safety net - User wants tests for business-critical logic - User wants to document behavior through executable tests ## How to Use ### The TDD cycle ``` RED → Write a failing test for the behavior you want GREEN → Write the minimum code to make the test pass REFACTOR → Clean up the code without breaking tests Repeat for each small behavior increment ``` ### Phase 1: RED — Write a failing test first Write the test before the implementation. It must fail to prove the test works. ```python # test_calculator.py — write this BEFORE calculator.py import pytest from calculator import add def test_add_two_positive_numbers(): assert add(2, 3) == 5 def test_add_negative_number(): assert add(-1, 5) == 4 def test_add_floats(): assert abs(add(0.1, 0.2) - 0.3) < 1e-9 ``` …
Read the whole file at its exact version.
How to install
mdr add taracodlabs/aiden/test-driven-development@sha256:d58a79b3aadf13e1The line at the top of this page pins the label v1.0.0, 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_gyqcwbnenni5w44q)
6 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, all committed on Apr 17, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.0.0 latest | 2026-04-17 | a38c031 | 4,594 B | A | view · diff |
| v1.0.0 | 2026-04-17 | 9e46d41 | 4,574 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 (4594 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
taracodlabs/aiden · 875 stars · license AGPL-3.0 · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_gyqcwbnenni5w44q GET https://markdownregistry.com/api/v1/resolve?ref=taracodlabs/aiden/test-driven-development GET https://markdownregistry.com/api/v1/blob/d58a79b3aadf13e171144f8da636a2edd1a87caab128357e5cdb1751087bf682
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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