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Wyrly DI is a dependency injection toolkit for explicit, analyzable, type-safe application architecture. Use it when you want dependency injection for modern TypeScript apps without legacy decorator metadata, automatic runtime type guessing, or framework lock-in.

Get started

Install @wyrly/core for Deno, Node.js, or Bun and create your first container.

Why Wyrly?

Learn why Wyrly uses typed tokens, explicit dependencies, and standard decorators.

Framework adapters

Add request-scoped DI to Next.js, Express, Hono, Fresh, Fastify, and GraphQL (Yoga / Apollo).

API reference

See the stable public exports for Wyrly DI v2.2.

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What Wyrly is for

Wyrly is designed for TypeScript applications that value clear composition roots, explicit dependencies, and framework-independent domain code. It fits especially well with DDD and Clean Architecture, where use cases depend on ports and the outer layer wires concrete infrastructure through typed tokens.

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Core ideas

  • No reflect-metadata
  • No emitDecoratorMetadata
  • No parameter decorators
  • Type-safe tokens
  • Explicit dependencies
  • Singleton, scoped, and transient lifetimes
  • Request scopes for web frameworks
  • Inspectable and validatable dependency graphs

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Packages

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Start with an example

If you are new to Wyrly, start with the core quickstart, then pick the adapter that matches your runtime.

Core quickstart

Register a repository implementation and resolve a use case from a scope.

Examples

Find runnable examples for DDD, provider patterns, graph validation, and web frameworks.