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dotnet-test-migration

v0.1.9

Skills for migrating .NET test frameworks and platforms: MSTest and xUnit version upgrades, xUnit/NUnit-to-MSTest conversion, and VSTest to Microsoft.Testing.Platform.

CodexClaude Code6 Skills

484 GitHub starsUpdated yesterday

Directory evidence

Runtimes
Codex and Claude Code
Parsed components
6 skill or MCP entries
Source updated
Sep 23, 2026
Manifest status
Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install dotnet-test-migration for Codex and Claude Code

Installs for the current user
codex plugin marketplace add IchenDEV/agent-plugin-mkt
codex plugin marketplace upgrade agent-plugin-marketplace
codex plugin add dotnet-test-migration@agent-plugin-marketplace

Paste and run these commands in a terminal with Codex. They add and refresh the PluginsMP catalog, then install this plugin.

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually
git clone https://github.com/managedcode/dotnet-skills

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The plugin root is external-sources/upstreams/dotnet-skills/dotnet-test-migration/.

Plugin files

external-sources/upstreams/dotnet-skills/dotnet-test-migration/
├── .codex-plugin/plugin.json
├── .claude-plugin/plugin.json
├── skills/migrate-mstest-v1v2-to-v3/SKILL.md
├── skills/migrate-mstest-v3-to-v4/SKILL.md
├── skills/migrate-nunit-to-mstest/SKILL.md
├── skills/migrate-vstest-to-mtp/SKILL.md
├── skills/migrate-xunit-to-mstest/SKILL.md
└── skills/migrate-xunit-to-xunit-v3/SKILL.md

Included Skills6

migrate-mstest-v1v2-to-v3skills/migrate-mstest-v1v2-to-v3/SKILL.md

Use this skill before answering or editing whenever an MSTest v1/v2 project is being upgraded or repaired for v3. Triggers include QualityTools assembly references; MSTest.TestFramework/TestAdapter 1.x-2.x; "upgrade to MSTest v3"; comparing v1 and v2 migration paths; choosing MSTest or MSTest.Sdk; CS0411/CS1503 after a v3 package bump; DataRow type mismatch, MSTEST0014, or "Test data doesn't match method parameters"; .testsettings/LegacySettings to .runsettings; timeout changes; and net5.0 or other dropped v3 TFMs. Still use it when packages say 3.x but migration source errors or legacy settings remain. Preserve VSTest/MTP. Do not use for a clean v3 project, v3-to-v4, framework conversion, or runner-only migration.

migrate-mstest-v3-to-v4skills/migrate-mstest-v3-to-v4/SKILL.md

Use this skill before answering, planning, or editing any MSTest 3.x-to-4.x upgrade or post-upgrade failure. Triggers include "MSTest v4 breaking changes"; CS0507/CS0103/CS1061/CS1615; ExecuteAsync, CallerInfo, DisplayName, or custom TestMethodAttribute; ClassCleanupBehavior; ContainsKey; ThrowsExactly or ExpectedException; IsInstanceOfType out parameters; TestTimeout.Infinite; ManagedType; net6/net7 compatibility; TestCase.Id history; TestName in ClassInitialize; TreatDiscoveryWarningsAsErrors; discovery errors after a clean build; and MSTest.Sdk/MTP or vstest.console discovery changes. Do not use for v1/v2-to-v3 leftovers, framework conversion, runner-only migration, or a general .NET upgrade.

migrate-nunit-to-mstestskills/migrate-nunit-to-mstest/SKILL.md

Convert .NET tests from NUnit 3/4 to MSTest v4 while preserving VSTest or MTP. Use for replacing NUnit/NUnit3TestAdapter packages, Test/TestCase/ TestCaseSource/Values attributes, constraint assertions, SetUp/TearDown, OneTimeSetUp, SetUpFixture, FixtureLifeCycle, TestContext, categories, retries, timeouts, and NUnit parallelization. Also use when a "convert NUnit to MSTest" request may already be migrated: inspect and report the no-op. Do not use for NUnit version upgrades, xUnit/TUnit conversion, MSTest upgrades, or runner-only VSTest-to-MTP migration.

migrate-vstest-to-mtpskills/migrate-vstest-to-mtp/SKILL.md

Use this skill before answering, planning, or editing whenever .NET tests or CI are switching from VSTest to Microsoft.Testing.Platform (MTP), or an MTP migration behaves differently. Triggers include "switch from VSTest"; MSTest/NUnit/xUnit MTP enablement; OutputType=Exe only for test projects in Directory.Build.props; EnableMSTestRunner, EnableNUnitRunner, UseMicrosoftTestingPlatformRunner, or YTest.MTP.XUnit2; .NET 10 global.json test.runner and TestingPlatformDotnetTestSupport; translating VSTest filters, logger, coverage, blame, or dump arguments; replacing VSTest@3; and exit code 8 or zero tests. Also use for xUnit v3 MTP filters during a v2-to-v3 upgrade. Do not use for framework conversion, TFM, UWP, or WinUI.

migrate-xunit-to-mstestskills/migrate-xunit-to-mstest/SKILL.md

Convert .NET tests from xUnit.net v2/v3 to MSTest v4 while preserving VSTest or MTP. Use for replacing xunit packages, Fact/Theory/InlineData/MemberData, assertions, IClassFixture/ICollectionFixture, ITestOutputHelper, TestContext cancellation, traits/Owner, skips, timeouts, and xUnit parallelization. Also use when a "convert xUnit to MSTest" request may already be migrated: inspect and report the no-op. Do not use for xUnit v2-to-v3, MSTest upgrades, NUnit/TUnit conversion, or runner-only VSTest-to-MTP migration.

migrate-xunit-to-xunit-v3skills/migrate-xunit-to-xunit-v3/SKILL.md

Migrate .NET test projects from xUnit.net v2 to xunit.v3 and fix v3 breaks. Use for package/CPM conversion, OutputType=Exe, preserving the VSTest or MTP runner (including projects currently using YTest.MTP.XUnit2), incompatible TFMs, async void tests, string-to-Type attributes, custom Fact/Theory/BeforeAfterTest attributes, Xunit.SkippableFact, xunit.abstractions/extensibility consolidation, and Xunit.Combinatorial/StaFact compatibility. Do not use for framework conversion or a runner-only migration. For xUnit v3 MTP filter syntax, also use migrate-vstest-to-mtp.

Plugin manifests2

external-sources/upstreams/dotnet-skills/dotnet-test-migration/.codex-plugin/plugin.json
{
  "name": "dotnet-test-migration",
  "version": "0.1.9",
  "description": "Skills for migrating .NET test frameworks and platforms: MSTest and xUnit version upgrades, xUnit/NUnit-to-MSTest conversion, and VSTest to Microsoft.Testing.Platform.",
  "skills": [
    "./skills/"
  ]
}
external-sources/upstreams/dotnet-skills/dotnet-test-migration/.claude-plugin/plugin.json
{
  "name": "dotnet-test-migration",
  "version": "0.1.9",
  "description": "Skills and an orchestrator agent for migrating .NET test frameworks and platforms: MSTest and xUnit version upgrades, xUnit/NUnit-to-MSTest conversion, and VSTest to Microsoft.Testing.Platform.",
  "skills": [
    "./skills/"
  ],
  "agents": [
    "./agents/test-migration.agent.md"
  ]
}

For maintainers

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[dotnet-test-migration on Agent Plugins Marketplace](https://pluginsmp.com/plugins/dotnet-test-migration)