Planned

• [Breaking][MTP v2]: Remove ITestApplicationLifecycleCallbacks in favor of ITestHostApplicationLifetime #5733 (Done in [rel/4.0] Cleanup and progress on obsolete MTP APIs #5993)
• [rel/4.0] Cleanup and progress on obsolete MTP APIs #5993
• Drop support for < net8.0 in MSTest and MTP #5614 (NOTE: This is common for MTP and MSTest)
• [MTP v2][Breaking] Avoid the use of C# records in public API #5517
• [MTP v2] Add CancellationToken parameter to more async methods. #5342
• Review all exposed extensibility points and substitute the couple SessionId and CancellationToken with Microsoft.Testing.Platform.Services.ITestSessionContext #3356
• Microsoft.Testing.Platform.Extensions.TestHost.IDataConsumer should be defined inside the Microsoft.Testing.Platform.Extensions #3354
• TrxReport should use TestNodeUid as-is if it's a Guid already. (Few adjustments for test id #5936)
• [MTP v2] Consider breaking old dotnet test experience #5722
• Rename diagnostic options to use kebab case #3630
• Enable again EnableCodeCoverage which is temporarily being disabled in Use ITestSessionContext instead of SessionUid and CancellationToken #5995, as well as adding CC as a dependency of MSTest metapackage back, and MSTest.Sdk as well. PR: [rel/4.0]: MSTest.Sdk: Enable CC in NativeAOT.targets and in our tests #6343
• Make the TestNodeUpdateMessage and in general every payload structure immutable. #3473
• We have two TestSessionContext classes. One in TestHost namespace and one in Services. We should discuss removing the one in TestHost namespace. [rel/4.0]: Unify TestSessionContext #6344

To discuss

• TreeNodeFilterCommandLineOptionsProvider seems to be using the wrong Version #4294

Cancelled

• [MTP][Breaking for v2] AddSelfRegisteredExtensions shouldn't need to have string[] args parameter #5453
• ITrxReportCapability interface design has a flaw where "enabled" state is unknown to callers #5532
• use ValueTask instead of Task if possible #3474
• [MTP][Breaking] Remove TrxFullyQualifiedTypeNameProperty once we get rid of vstestProvider capability #5474
• [MTP] Error when VSTest arguments are passed via old dotnet test when they will be ignored #5697 (NOTE: Not needed in v2 if we remove the whole thing in v2 ;))
• [MTP v2][Breaking] Revise MTP properties and where they do belong (test node vs update message) #5524