Type system for Ruby supporting coercions, constraints and complex types like structs, value objects, enums etc

Predicate logic with rule composition

A mixin to add configuration functionality to your classes

Validation library

A flexible framework for maintainable Ruby apps

dry-schema provides a DSL for defining schemas with keys and rules that should be applied to values. It supports coercion, input sanitization, custom types and localized error messages (with or without I18n gem). It's also used as the schema engine in dry-validation.

Typed structs and value objects

Common monads for Ruby

Persistence and mapping toolkit for Ruby

Repository abstraction for rom-rb

rom-changeset adds support for preprocessing data on top of rom-rb repositories

Hanami utilities

Container-agnostic automatic constructor injection

Pub/sub system

Business Transaction Flow DSL

Flexible, expressive pattern matching for Ruby

Organize your code into reusable components

SQL databases support for ROM

Monitoring and instrumentation APIs

A complete, standalone view rendering system that gives you everything you need to write well-factored view code