mkl-write-regression SKILL.md skillA
mkl-write-regression from 00200200/maintainer-skills-lab is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add 00200200/maintainer-skills-lab/mkl-write-regression@git:20260929.4dab0aePins git:20260929.4dab0ae in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- 00200200/maintainer-skills-lab
- Path
skills/mkl-write-regression/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260929.4dab0ae, committed Sep 29, 2026
- First version recorded
- Sep 13, 2026
- Size
- 1,905 bytes
- Repository stars
- 48
- License
- MIT
Write a focused regression test from an established bug reproduction and public behavior. Use when a fix needs a test that fails on the affected version; avoid mirroring the implementation or weakening assertions.
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
# Write a regression test Read the reproduction, expected public behavior, and nearby test conventions. Derive the assertion from the behavior a caller needs, not from the proposed implementation. Write the smallest test that captures the defect. Use deterministic inputs and existing project dependencies where practical. Do not mock away the faulty path. Place supporting fixtures beside the test and explain any environment requirements. Run the test against the affected implementation before accepting it as a regression test. Use concise output flags (`pytest -q --tb=short -x`, or `python3 tools/test_fast.py`; unittest: `-q -f`) so failures stay readable instead of dumping full local-variable tracebacks. Inspect why it failed: an assertion about the reported behavior is evidence; an import error, collection failure, permission problem, or timeout is not the intended proof. Keep the test unchanged when evaluating the fix. If the fix is already present, use an isolated checkout or an equivalent preserved baseline to test the pre-fix version. Preserve the user's current checkout and uncommitted work. Do not revert their working tree merely to get a red test. …
Read the whole file at its exact version.
How to install
mdr add 00200200/maintainer-skills-lab/mkl-write-regression@sha256:117e37820fac511eThe line at the top of this page pins the label git:20260929.4dab0ae, 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_ew3najpxmvnvll3o)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Sep 13, 2026 and Sep 29, 2026, about one every 16 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260929.4dab0ae latest | 2026-09-29 | 4dab0ae | 1,905 B | A | view · diff |
| git:20260913.04cb5b6 | 2026-09-13 | 04cb5b6 | 1,723 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 (1905 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
00200200/maintainer-skills-lab · 48 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ew3najpxmvnvll3o GET https://markdownregistry.com/api/v1/resolve?ref=00200200/maintainer-skills-lab/mkl-write-regression GET https://markdownregistry.com/api/v1/blob/117e37820fac511e8894b53f5e7c05b33542433ae4ba5191d20495c61d6a7a69
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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