test-gap-review SKILL.md skillA
test-gap-review from yarlson/yarstack is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add yarlson/yarstack/test-gap-review@git:20261017.2f2e03bPins git:20261017.2f2e03b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- yarlson/yarstack
- Path
plugins/yarstack/skills/test-gap-review/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261017.2f2e03b, committed Oct 17, 2026
- First version recorded
- Jul 17, 2026
- Size
- 2,276 bytes
- Repository stars
- 3
- License
- MIT
Review whether existing tests and verification credibly prove a scoped behavior contract. Use during validation when evidence may omit important behavior or provide false confidence.
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 Gap Review Audit verification sufficiency without silently becoming a test-writing or production implementation workflow. ## Workflow 1. Establish the authoritative behavioral contract, comparison scope, and claimed verification. 2. Map invariants, assumptions, normal behavior, important boundaries, meaningful failures, preserved state, cleanup, and external effects to existing evidence. 3. Identify weak assertions, fixtures that cannot fail meaningfully, implementation-detail tests, expected values derived from the code under test, mocks of code the system owns, coverage numbers cited as proof, unsupported manual claims, and skipped required commands. Flag example-only evidence when the claim spans a broad input space, operation sequence, concurrent ordering, restart, or recovery, and check that generated failures are reproducible. 4. For each high-risk claim, ask whether its test would fail if the behavior broke. Reason through a likely mutation, such as a flipped condition, a removed call, or an off-by-one bound. Run a temporary mutation only in a scratch copy, never in the user's working tree. …
Read the whole file at its exact version.
How to install
mdr add yarlson/yarstack/test-gap-review@sha256:661aee75563d9327The line at the top of this page pins the label git:20261017.2f2e03b, 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_34dokfm2u7pcvgxo)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jul 17, 2026 and Oct 17, 2026, about one every 23 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261017.2f2e03b latest | 2026-10-17 | 2f2e03b | 2,276 B | A | view · diff |
| git:20260724.0771972 | 2026-07-24 | 0771972 | 1,898 B | A | view · diff |
| git:20260720.2e4f3b4 | 2026-07-20 | 2e4f3b4 | 1,641 B | A | view · diff |
| git:20260718.188cd11 | 2026-07-18 | 188cd11 | 1,382 B | A | view · diff |
| git:20260717.dc9a72d | 2026-07-17 | dc9a72d | 1,721 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 (2276 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
yarlson/yarstack · 3 stars · license MIT · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_34dokfm2u7pcvgxo GET https://markdownregistry.com/api/v1/resolve?ref=yarlson/yarstack/test-gap-review GET https://markdownregistry.com/api/v1/blob/661aee75563d93270e12666eb987855a88347dd4983a5eb04dbe336777ac5042
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.