test-gap-analysis SKILL.md skillA
test-gap-analysis from dotnet/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add dotnet/skills/test-gap-analysis@git:20261013.3b4ec85Pins git:20261013.3b4ec85 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- dotnet/skills
- Path
plugins/dotnet-test/skills/test-gap-analysis/SKILL.md- Versions recorded
- 9
- Latest version
- git:20261013.3b4ec85, committed Oct 13, 2026
- First version recorded
- Aug 26, 2026
- Size
- 19,334 bytes
- Repository stars
- 5,836
- License
- MIT
Find caller-visible production changes existing tests would miss through pseudo-mutation analysis; verify candidates or close gaps only when requested. Includes read-only per-test composition for grading. Polyglot. USE FOR: would tests catch a bug, behavioral blind spots, surviving mutations. DO NOT USE FOR: concrete fix/feature revision proof (test-value-evidence); suite taxonomy (test-tagging); .NET coverage, Cobertura, plateaus or coverage-backed priorities (coverage-analysis); named CRAP…
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 Analysis Answer one question: **which caller-visible production behaviors could change without an existing test failing?** Mutation reasoning is a probe, not the goal. Inventory public outcomes first, then verify only credible gaps. ## Composition dispatch Before entering the decision flow, check the caller's mode. An explicit `per-test-read-only` request (including composition from `grade-tests`) uses only [references/per-test-read-only.md](references/per-test-read-only.md). This mode is assessment context conveyed through the host's supported caller instructions, not a new skill-loader parameter or a mode-specific skill name. Read that reference and return its per-test assessment inline; **do not enter the standalone workflow below**. Loading this mode does not authorize a baseline run, mutation execution, file edits, suite discovery, or delegation. If the bundled reference is unavailable, allow at most one listing of the known `references/` directory, then return **N/A / unverified** with the reason. Requests without this mode retain the standalone analysis, verification, and test-addition paths below. ## Decision flow ### 1. Set scope …
Read the whole file at its exact version.
How to install
mdr add dotnet/skills/test-gap-analysis@sha256:1214a29071033d4bThe line at the top of this page pins the label git:20261013.3b4ec85, 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_oyryk4q6mtjp3kei)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 9 versions of this file, between Aug 26, 2026 and Oct 13, 2026, about one every 6 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261013.3b4ec85 latest | 2026-10-13 | 3b4ec85 | 19,334 B | A | view · diff |
| git:20261009.e191d40 | 2026-10-09 | e191d40 | 19,563 B | A | view · diff |
| git:20261008.e468462 | 2026-10-08 | e468462 | 19,130 B | A | view · diff |
| git:20261008.a51399b | 2026-10-08 | a51399b | 17,838 B | A | view · diff |
| git:20260904.ac8f412 | 2026-09-04 | ac8f412 | 17,850 B | A | view · diff |
| git:20260903.30b30ef | 2026-09-03 | 30b30ef | 16,646 B | A | view · diff |
| git:20260828.1dd5e2b | 2026-08-28 | 1dd5e2b | 15,809 B | A | view · diff |
| git:20260828.2b9056b | 2026-08-28 | 2b9056b | 12,616 B | A | view · diff |
| git:20260826.3cd1337 | 2026-08-26 | 3cd1337 | 10,905 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 (19334 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
dotnet/skills · 5,836 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_oyryk4q6mtjp3kei GET https://markdownregistry.com/api/v1/resolve?ref=dotnet/skills/test-gap-analysis GET https://markdownregistry.com/api/v1/blob/1214a29071033d4b3da9f24062dcb517b88f7b1f7265a330f72521d92773495a
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.