Code Analysis Rules

This section documents the code analysis rules provided by the Arc.Core code analyzer for .NET.

Arc.Core includes Roslyn analyzers that validate Arc constructs at compile time to catch errors early and enforce best practices.

All rules follow the identifier format ARC#### where the numbers are sequential without gaps.

Rules Overview

Rule ID	Title	Severity	Description
ARC0001	Incorrect query method signature on ReadModel	Error	ReadModel query methods must return the ReadModel type or an allowed wrapper of it.
ARC0002	Missing [Command] attribute on command-like type	Warning	Command-like types must be marked with [Command] to be recognized as commands.
ARC0003	Handle() must be on [Command] type	Error	Public command Handle() methods must be declared on the command type itself.
ARC0004	[Command] type must have public Handle() method	Error	Types marked with [Command] must declare a public instance Handle() method.

Quick Fixes

No automatic code fixes are currently provided for these rules.

Installation

The analyzer is automatically included when you reference Arc.Core in your project. No additional configuration is required.

<ItemGroup>
    <ProjectReference Include="../Arc.Core/Arc.Core.csproj" />
</ItemGroup>