DesignPatternsCompile-time design patterns for .NET

Lightweight runtime primitives + Roslyn source generators — Strategy, Chain, Composite, Factory, Decorator, and more

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Composition over inheritance

Small interfaces and builders instead of heavy base-class frameworks.

Source generators

Attributes like [RegisterStrategy] and [HandlerOrder] emit keys, registries, and pipelines at compile time.

Diagnostics

DP001–DP025 catch duplicate keys, contract mismatches, missing registrations, and unknown registry keys before runtime.

Optional DI

DesignPatterns.Extensions.DependencyInjection adds RegisterDi helpers when you use Microsoft.Extensions.DependencyInjection.

Status

Early preview

Public APIs, generated code shapes, and diagnostic IDs are not stable yet. Install Skymly.DesignPatterns 0.1.0-preview3 from nuget.org, or use a sibling clone / pin a commit until a stability announcement.

Where to read next

Page	Purpose
Getting started	Clone layout, build, and first attribute
Samples	Runnable DesignPatterns.Samples repo
Diagnostics	DP### compiler messages
Reference	Repositories and packages

Pattern guides live under Patterns in the sidebar.