How does this skill handle state manipulation?

It utilizes Monocle's Focus API to create lenses that can zoom into nested case classes, allowing for immutable updates within a monadic context.

Can this skill help with project configuration?

Yes, it includes specific commands and snippets to add the necessary Cats and Monocle dependencies to your build.sbt file.

What primary libraries does this skill support?

This skill is designed to work with Cats-core for functional abstractions and Monocle for optics and state lenses.

Why are Monad laws important for this skill?

Adhering to laws like associativity and identity ensures that your functional code is predictable, composable, and easier to test or refactor.

Scala Cats Focus & Monad

Name: Scala Cats Focus & Monad
Author: plurigrid

byplurigrid

•

開発者ツール

Implements lawful functional programming patterns using Cats and Monocle for robust Scala state and effect management.

This skill provides Claude with the specialized knowledge required to write type-safe, lawful Scala code using the Typelevel Cats library and Monocle optics. It streamlines the creation of purely functional pipelines by enforcing monad laws—including identity and associativity—while allowing precise manipulation of nested data structures through lenses. By integrating ternary logic (GF(3) Trit) and Monad composition patterns, this skill helps developers manage complex state transitions and side effects with mathematical rigor and minimal boilerplate.

主な機能

01Enforces Monad laws including Left/Right Identity and Associativity

02Implements GF(3) Trit ternary logic for advanced state validation

03Integrates Monocle Focus for deep-nested state manipulation

04Automates build.sbt dependency configuration for Typelevel stacks

058 GitHub stars

06Provides standardized for-comprehension patterns for effect management

ユースケース

01Implementing predictable effect management pipelines for backend services

02Refactoring imperative logic into lawful, mathematically sound functional patterns

03Managing complex nested state in purely functional Scala applications

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add plurigrid/asi cats-focus-monad

For use in Claude.ai and ChatGPT

Download Skill