writing-tests SKILL.md skillA
writing-tests from iliaal/ai-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add iliaal/ai-skills/writing-tests@git:20261019.5dcf8a9Pins git:20261019.5dcf8a9 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- iliaal/ai-skills
- Path
skills/writing-tests/SKILL.md- Versions recorded
- 9
- Latest version
- git:20261019.5dcf8a9, committed Oct 19, 2026
- First version recorded
- Jul 27, 2026
- Size
- 5,303 bytes
- Repository stars
- 45
- License
- MIT
Generic test writing discipline: test quality, real assertions, anti-patterns, and rationalization resistance. Use when writing tests, adding test coverage, or fixing failing tests for any language or framework. Complements language-specific skills.
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
# Writing tests Produce tests that prove the requested behavior and fail when that behavior breaks. Follow user scope and the repository's actual contracts; this skill does not authorize implementation, external actions, or changes to acceptance criteria. ## Procedure 1. Discover the repository's runner, pinned wrapper, configuration, neighboring tests, and CI command before writing tests. Learn both focused and full-suite commands. Use project tooling rather than a global default; keep tracked scripts portable and apply personal wrappers only to the outer invocation. 2. Derive cases from user requirements, implemented behavior, and claims intended for the handoff. Map each acceptance criterion to a discriminating case that a plausible wrong implementation fails. Name tests by observable behavior; keep one behavior per test and make fixtures adversarial on the axis under test. …
Read the whole file at its exact version.
How to install
mdr add iliaal/ai-skills/writing-tests@sha256:d6b1262c78a5b999The line at the top of this page pins the label git:20261019.5dcf8a9, 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_rw5ecaiyphb5v7ns)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 9 versions of this file, between Jul 27, 2026 and Oct 19, 2026, about one every 10 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261019.5dcf8a9 latest | 2026-10-19 | 5dcf8a9 | 5,303 B | A | view · diff |
| git:20261003.39b82ef | 2026-10-03 | 39b82ef | 5,147 B | A | view · diff |
| git:20260926.7b0520a | 2026-09-26 | 7b0520a | 4,985 B | A | view · diff |
| git:20260913.76ac4e8 | 2026-09-13 | 76ac4e8 | 4,914 B | A | view · diff |
| git:20260908.6c9fed1 | 2026-09-08 | 6c9fed1 | 4,826 B | A | view · diff |
| git:20260906.9107cb1 | 2026-09-06 | 9107cb1 | 24,595 B | A | view · diff |
| git:20260829.3d61391 | 2026-08-29 | 3d61391 | 23,768 B | A | view · diff |
| git:20260829.a566ff1 | 2026-08-29 | a566ff1 | 17,182 B | A | view · diff |
| git:20260727.3ddf2a2 | 2026-07-27 | 3ddf2a2 | 15,701 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 (5303 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
iliaal/ai-skills · 45 stars · license MIT · pushed 2026-10-31 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_rw5ecaiyphb5v7ns GET https://markdownregistry.com/api/v1/resolve?ref=iliaal/ai-skills/writing-tests GET https://markdownregistry.com/api/v1/blob/d6b1262c78a5b9992b27890df820762394e9b48d3db5ea68d0ded6a76fdd28ee
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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