Skills

code-testing-extensions

code-testing-extensions is a skill in dotnet/skills, last changed 9 Oct 2026. It can run shell commands, reach the network and name web addresses — read the findings before installing. Our pattern check flagged nothing at commit 586f13f on 27 Oct 2026.

Pattern check: nothing flagged · commit 586f13f · 27 Oct 2026

Install
From the author
Provides file paths to language-specific extension files for the code-testing pipeline. Read this reference-only catalog for extension guidance files (e.g., dotnet.md for .NET, cpp.md for C++). Agents and skills read its bundled files directly; do not invoke this catalog through the model's skill tool.
Licence
MIT
Repo stars
5.8k
Folder last changed
9 Oct 2026 (opens in a new tab)
Publisher
dotnet
Files
22 files
Checked
586f13f (opens in a new tab) · 27 Oct 2026

Install

Each tab says whether it installs commit 586f13f, the one we checked, or the latest version.

No tab for your agent? Use Any agent for OpenCode, Goose, Windsurf (Devin Desktop), Zed, Roo Code, Factory Droid, Junie, Amp and Antigravity, and Claude Code for Cline. Kiro needs the folder copied by hand.

Pinned to commit 586f13f, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&
  git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/dotnet/skills.git "$tmp" &&
  git -C "$tmp" fetch -q --depth 1 origin 586f13f8d898a60583a3364f146a3b6f5a763164 &&
  git -C "$tmp" sparse-checkout set -- plugins/dotnet-test/skills/code-testing-extensions &&
  git -C "$tmp" checkout -q 586f13f8d898a60583a3364f146a3b6f5a763164 &&
  mkdir -p .claude/skills &&
  mkdir .claude/skills/code-testing-extensions &&
  cp -R "$tmp"/plugins/dotnet-test/skills/code-testing-extensions/. .claude/skills/code-testing-extensions/ &&
  rm -rf "$tmp"

If Claude Code was already running and this created the skills folder, run /reload-skills.

Or install the dotnet-test plugin it ships in. Installs the latest version, not the one we checked. Installs everything in the plugin, including any hooks, MCP servers and scripts our check doesn't cover.

claude plugin marketplace add dotnet/skills --scope project &&
  claude plugin install dotnet-test@dotnet-agent-skills --scope project
Claude Code docs (opens in a new tab)

What it can touch

From the files and frontmatter at commit 586f13f. This is how much a skill can do, not whether it is risky.

What it can touch: Shell, network or credentials

  • Runs shell commands

    Its instructions or files give the agent commands to run on your computer.

  • Reaches the network

    It sends or fetches data over the internet, for example with curl, an HTTP library or a package install.

  • Names web addresses

    It mentions outside web addresses the agent may visit. We list them but don't follow them.

Pattern check

Pattern check: nothing flagged · commit 586f13f · 27 Oct 2026

We checked every text file in this skill, at commit 586f13f on 27 Oct 2026, against 45 published patterns such as download-and-run commands, hidden text and credential access. We don't run the skill, we don't read the web pages it points to, and we can't judge everything its instructions might lead an agent to do. In published tests, pattern checks like this one missed most malicious skills. Read the skill before you install it — especially anything it asks you to download or run.

How the check worksReport an incorrect finding

Outside links we did not follow

  • https://github.com/google/googletest/archive/refs/tags/v1.14.0.zip
  • https://github.com/catchorg/Catch2/archive/refs/tags/v3.5.4.zip
  • https://github.com/apple/swift-collections.git

Format check

Each agent reads SKILL.md a little differently. We check the file against each one's published rules; we don't run the skill in any agent.

  • Agent Skills specPasses with warnings

    The open format from agentskills.io, held to what the strictest agents enforce, so one folder loads everywhere.

    • Warning

      Fields outside the spec: user-invocable (read by Claude Code and VS Code) and disable-model-invocation (read by Claude Code and VS Code). Uploads to the Claude apps and API, and the spec's validator, reject the file; most agents ignore these fields. O1

      Fix: Delete them for a portable skill, or keep them if you only target the agents that read them.

    • Note

      The description doesn't say when to use the skill. D6

      Fix: Add a sentence such as "Use when …" naming the requests or files that should trigger it.

    • Note

      Reference files that SKILL.md doesn't link: extensions/cpp-examples.md, extensions/kotlin-examples.md, extensions/powershell-examples.md, extensions/ruby-examples.md and extensions/rust-examples.md. Anthropic suggests linking every reference file directly from SKILL.md. B4

      Fix: Link each one from SKILL.md and say when to read it.

    • Note

      Reference files over 100 lines with no table of contents at the top: extensions/cpp-examples.md (299 lines), extensions/cpp.md (510 lines), extensions/dotnet-examples.md (371 lines), extensions/dotnet.md (219 lines), extensions/go-examples.md (397 lines) and 16 more. B5

      Fix: Add a short list of the sections at the top of each.

  • Claude CodePasses

    Claude Code reads its own extra fields, ignores unknown ones, and still loads a skill whose frontmatter is broken, without its fields.

    • Note

      Reference files that SKILL.md doesn't link: extensions/cpp-examples.md, extensions/kotlin-examples.md, extensions/powershell-examples.md, extensions/ruby-examples.md and extensions/rust-examples.md. Anthropic suggests linking every reference file directly from SKILL.md. B4

      Fix: Link each one from SKILL.md and say when to read it.

    • Note

      Reference files over 100 lines with no table of contents at the top: extensions/cpp-examples.md (299 lines), extensions/cpp.md (510 lines), extensions/dotnet-examples.md (371 lines), extensions/dotnet.md (219 lines), extensions/go-examples.md (397 lines) and 16 more. B5

      Fix: Add a short list of the sections at the top of each.

  • Claude apps & API uploadFails

    Uploading to claude.ai or the Claude API, or packaging with Anthropic's script, accepts only the six spec fields and stops on anything else.

    • Error

      Upload and packaging fail on fields outside the spec: user-invocable and disable-model-invocation. O1

      Fix: Delete them, and keep your own data under metadata as text values.

    • Note

      The description is 303 characters. The claude.ai Help Center says 200 at most, though Anthropic's API docs and validator allow 1,024. D4

      Fix: If the claude.ai upload refuses it, trim the description to 200 characters.

    • Note

      Reference files that SKILL.md doesn't link: extensions/cpp-examples.md, extensions/kotlin-examples.md, extensions/powershell-examples.md, extensions/ruby-examples.md and extensions/rust-examples.md. Anthropic suggests linking every reference file directly from SKILL.md. B4

      Fix: Link each one from SKILL.md and say when to read it.

    • Note

      Reference files over 100 lines with no table of contents at the top: extensions/cpp-examples.md (299 lines), extensions/cpp.md (510 lines), extensions/dotnet-examples.md (371 lines), extensions/dotnet.md (219 lines), extensions/go-examples.md (397 lines) and 16 more. B5

      Fix: Add a short list of the sections at the top of each.

  • OpenAI (Codex & API)Passes with warnings

    Codex finds SKILL.md by its exact name and needs a description; OpenAI's Skills API checks the frontmatter against the spec and caps uploads.

    • Warning

      Fields outside the spec: user-invocable and disable-model-invocation. Codex ignores them; OpenAI doesn't say whether its upload accepts them. O1

      Fix: Delete them, or move your own data under metadata as text values.

  • VS Code & CopilotPasses

SKILL.md

Files

22 files

PathSize
SKILL.md (opens in a new tab)3.7 KB
extensions/cpp-examples.md (opens in a new tab)9.1 KB
extensions/cpp.md (opens in a new tab)20.1 KB
extensions/dotnet-examples.md (opens in a new tab)10.7 KB
extensions/dotnet.md (opens in a new tab)10.5 KB
extensions/go-examples.md (opens in a new tab)12.4 KB
extensions/go.md (opens in a new tab)7.8 KB
extensions/java-examples.md (opens in a new tab)11.9 KB
extensions/java.md (opens in a new tab)9.7 KB
extensions/kotlin-examples.md (opens in a new tab)10.3 KB
extensions/kotlin.md (opens in a new tab)11.2 KB
extensions/powershell-examples.md (opens in a new tab)9.1 KB
extensions/powershell.md (opens in a new tab)12.1 KB
extensions/python-examples.md (opens in a new tab)12.1 KB
extensions/python.md (opens in a new tab)11.7 KB
extensions/ruby-examples.md (opens in a new tab)8.9 KB
extensions/ruby.md (opens in a new tab)14.7 KB
extensions/rust-examples.md (opens in a new tab)10.6 KB
extensions/rust.md (opens in a new tab)8.8 KB
extensions/swift.md (opens in a new tab)9.4 KB
Show 2 more
PathSize
extensions/typescript-examples.md (opens in a new tab)12.7 KB
extensions/typescript.md (opens in a new tab)7.9 KB

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