Koka is a monorepo containing several packages that provide algebraic effects and domain-driven development capabilities for TypeScript applications.

A lightweight 3kB alternative to Effect-TS based on Algebraic Effects

• Typed error handling
• Context management
• Async operations
• Minimal API surface

An AI-Oriented Domain-Driven Design framework built on Koka

• Algebraic effects for domain modeling
• Optics integration
• CQRS patterns

Bidirectional data accessors with optics

• Type-safe data transformations
• Lens/prism support
• Effectful data operations
• Composable access patterns

• Koka Core Documentation
• Koka DDD Documentation
• Koka Domain Documentation

We welcome contributions! Please see our Contribution Guidelines.

MIT