Code Testing Extensions Agent Skill
>- Provides file paths to language-specific extension files for the code-testing pipeline. Call this skill to discover available extension guidance files (e.g., dotnet.md for .NET, cpp.md for C++). Do not use directly — invoked by code-testing agents and skills that need language-specific references.
Install
one command, takes just this skill from the repositorynpx skills add https://github.com/dotnet/skills --skill code-testing-extensionsThe instruction itself
3 sections, as written by the authorCode Testing Extensions
This skill provides access to language-specific guidance files used by the code-testing pipeline. Call this skill to get the file paths, then read the relevant file for your target language.
Available Extension Files
| File | Language | Contents |
|------|----------|----------|
| extensions/dotnet.md | .NET (C#/F#/VB) | Build commands, test commands, project reference validation, common CS error codes, MSTest template |
| extensions/python.md | Python | Framework-adaptive test commands (pytest, custom runners), project layout detection, mocking guidelines, common errors |
| extensions/typescript.md | TypeScript/JavaScript | Build/test commands (Jest/Vitest/Mocha), framework detection, mocking, TS-specific considerations |
| extensions/powershell.md | PowerShell | Test commands (Pester v5), module import patterns, discovery/run pitfalls, mocking, common errors |
| extensions/cpp.md | C++ | Testing internals with friend declarations |
| extensions/go.md | Go | go test commands, table-driven tests, integration vs unit layout, mocking via interfaces, common errors |
| extensions/java.md | Java | Maven/Gradle commands, JUnit 4/5 and TestNG detection, Mockito, Spring Boot slices, common errors |
| extensions/rust.md | Rust | cargo test commands, unit vs integration vs doc tests, features, async test harnesses, common errors |
| extensions/ruby.md | Ruby | RSpec and Minitest commands, Bundler usage, Rails specifics, mocking patterns, common errors |
| extensions/swift.md | Swift | SPM and Xcode test commands, XCTest vs Swift Testing, @testable import, async/throws tests, common errors |
| extensions/kotlin.md | Kotlin | Gradle commands, JUnit/Kotest detection, MockK, coroutines test, KMP and Android specifics, common errors |
| extensions/dotnet-examples.md | .NET (C#/F#/VB) | Concrete pipeline examples: sample research output, plan, generated tests, fix cycles, final report |
| extensions/python-examples.md | Python | Concrete pipeline examples (pytest): research, plan, generated test file, fix cycles, final report |
| extensions/typescript-examples.md | TypeScript/JavaScript | Concrete pipeline examples (Vitest, applicable to Jest): research, plan, generated test file, fix cycles, final report |
| extensions/go-examples.md | Go | Concrete pipeline examples (standard testing): research, plan, table-driven test file, fix cycles, final report |
| extensions/java-examples.md | Java | Concrete pipeline examples (JUnit 5 + Mockito on Maven): research, plan, generated test file, fix cycles, final report |
Usage
Read the appropriate extension file for the target language before writing test code. When an <language>-examples.md file exists for the target language, read it alongside the base extension to see a concrete end-to-end pipeline walkthrough (research output, plan, generated tests, fix cycles, final report).
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How to use it
Take dotnet/code-testing-extensions from the repository into ~/.claude/skills for personal
use, or into .claude/skills inside a project.
The agent identifies a skill by the name field in its header. Two skills with the
same name cannot sit side by side — one of them will be ignored.