dotnet-add-analyzers

Add and configure .NET code analyzers to an existing project. Covers built-in Roslyn CA rules, nullable reference types enforcement, trimming/AOT compatibility analyzers, and third-party analyzer packages.

Prerequisites: Run [skill:dotnet-version-detection] first — analyzer features vary by SDK version. Run [skill:dotnet-project-analysis] to understand the current project layout.

Scope

• Built-in Roslyn CA rules and AnalysisLevel configuration
• Nullable reference types enforcement
• Trimming and AOT compatibility analyzers
• Third-party analyzer packages and severity configuration

Out of scope

• EditorConfig hierarchy and IDE code style preferences -- see [skill:dotnet-editorconfig]
• Solution layout and Directory.Build.props -- see [skill:dotnet-project-structure]
• New project scaffolding with analyzers -- see [skill:dotnet-scaffold-project]