dotnet-msbuild-tasks
dotnet-msbuild-tasks
Guidance for authoring custom MSBuild tasks: implementing the ITask interface, extending ToolTask for CLI wrappers, using IIncrementalTask (MSBuild 17.8+) for incremental execution, defining inline tasks with CodeTaskFactory, registering tasks via UsingTask, declaring task parameters, debugging tasks, and packaging tasks as NuGet packages.
Version assumptions: .NET 8.0+ SDK (MSBuild 17.8+). IIncrementalTask requires MSBuild 17.8+ (VS 2022 17.8+, .NET 8 SDK). All examples use SDK-style projects. All C# examples assume using Microsoft.Build.Framework; and using Microsoft.Build.Utilities; are in scope unless shown explicitly.
Scope boundary: This skill owns custom MSBuild task authoring -- ITask, ToolTask, IIncrementalTask, inline tasks, UsingTask, parameters, debugging, and NuGet packaging. MSBuild project system authoring (targets, props, items, conditions) is owned by [skill:dotnet-msbuild-authoring].
Cross-references: [skill:dotnet-msbuild-authoring] for custom targets, import ordering, items, conditions, and property functions.
ITask Interface
All MSBuild tasks implement Microsoft.Build.Framework.ITask. The simplest approach is to inherit from Microsoft.Build.Utilities.Task, which provides default implementations for BuildEngine and HostObject.
Minimal Custom Task
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