nw-fp-haskell

Model Haskell domain logic with GADTs, type classes, and effect systems.

Updated Apr 15, 2026

Search Tags:#haskell #domain-modeling #functional-patterns #type-systems #gadts #effect-systems

Ready to run

npx skills add https://github.com/StudentCristian/nWave-github --skill nw-fp-haskell

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: nw-fp-haskell
Source: https://github.com/StudentCristian/nWave-github/tree/main/.github/skills/nw-fp-haskell
Command: npx skills add https://github.com/StudentCristian/nWave-github --skill nw-fp-haskell

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Applies advanced Haskell patterns, including GADTs, type classes, and effect systems, to real-world domain modeling and reliable software design, helping teams write correct, maintainable code.

Core Features & Use Cases

GADTs for state machines and typed transitions
Type-class-based interfaces and modular layering
Effect management patterns (IO vs pure code separation) and testing strategies

Quick Start

Create a new Haskell project and begin experimenting with the starter domain-modeling patterns.

Frequently Asked Questions about nw-fp-haskell

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I model domain logic in Haskell using GADTs?▼

Modeling domain logic in Haskell using GADTs allows you to encode state machines and typed transitions, ensuring invalid states are rejected at compile time. This provides strong type safety for correctness-critical software.

What is the best way to separate pure code from IO effects in Haskell?▼

Separating pure code from IO effects in Haskell requires effect management patterns that create clear modular layering. This isolates side effects, making domain logic easier to test and maintain without compromising purity.

How do I structure type-class-based interfaces for modular layering in Haskell?▼

Structuring type-class-based interfaces in Haskell enables modular layering by defining clear boundaries between components. This approach supports maintainable code and allows interchangeable implementations for testing.

Can I use Haskell domain modeling patterns for correctness-critical software?▼

Haskell domain modeling patterns are highly suited for correctness-critical software and education contexts. By leveraging GADTs and type classes, they enforce strong type safety and prevent invalid state transitions.

Why should I use GADTs for state machines in Haskell?▼

Using GADTs for state machines in Haskell ensures typed transitions that make illegal states unrepresentable. This advanced pattern enforces compile-time guarantees, reducing runtime errors in complex domain logic.

What are the limitations of effect systems in Haskell domain modeling?▼

Effect systems in Haskell domain modeling require careful management of IO versus pure code separation. While they provide modular layering, improper structuring can complicate testing strategies and increase boilerplate.