nunit

Use when adding or modifying public API surface in NUnit — new or changed constraints, attributes, assertions, helpers, or any type/member visibility change. Covers the conventions NUnit maintainers enforce for types that ship to consumers of the framework.

Use when editing `.csproj`, `.nuspec`, `Directory.Build.props`, `Directory.Build.targets`, `Directory.Packages.props`, the Cake build (`build.cake`, `build.ps1`, `build.sh`), or GitHub Actions workflows. Covers central package management, MinVer-driven…

Use when writing or modifying C# method bodies, type declarations, or non-trivial logic in NUnit source. Covers NUnit's taste-and-judgment conventions — exception construction, simplification, naming intent, `StringComparison`, non-null check form, and `var`…

Use when modifying hot paths in NUnit — constraint evaluation, equality comparison, value formatting, reflection-based dispatch, collection inspection, or anything that runs once per assertion or per test discovery. Covers allocation patterns, reflection…

Use when writing or modifying tests in NUnit's own test projects, or when making a behavioral change to production code that needs test coverage. Covers test structure, attribute choice, helper visibility, platform guards, and which test projects are real.

Use when writing or modifying async code in NUnit — async test lifecycle (setup/teardown), `TestExecutionContext`, `AsyncLocal`, `Task`/`ValueTask` continuations, blocking vs non-blocking waits, or conditional `Thread.Abort` code. Covers the threading/async…

Create and update documentation for NUnit attributes following the established template structure

Create and update documentation for NUnit constraints following the established template structure