Does this skill help with error handling?

Yes, it promotes the use of Discriminated Unions and Result types (like neverthrow) for explicit error handling in functional code, rather than relying on uncontrolled exceptions.

What is the FCIS pattern mentioned in the skill?

Functional Core, Imperative Shell (FCIS) is a pattern where the complex logic (the core) is kept pure and functional, while side effects like I/O and state changes are isolated to the outer shell.

Why does this skill prefer 'type' over 'interface'?

Types are preferred because they compose more predictably with unions and intersections, support mapped types, and avoid the accidental declaration merging often associated with interfaces.

How does it handle function declarations?

The skill enforces using the 'function' keyword for top-level declarations to take advantage of hoisting and visibility, while reserving arrow functions for inline callbacks and stable React references.

Professional TypeScript Standards

Name: Professional TypeScript Standards
Author: ed3dai

byed3dai

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開発者ツール

Enforces high-quality TypeScript conventions focused on type safety, immutability, and functional programming patterns.

概要

This skill provides a comprehensive set of TypeScript coding standards and best practices designed to minimize bugs and improve code maintainability. It guides Claude to prefer types over interfaces for better composition, enforce immutability by default using readonly constraints, and implement the Functional Core, Imperative Shell (FCIS) pattern. Whether writing new code or reviewing existing implementations, this skill ensures consistency across type declarations, naming conventions, and asynchronous logic, ensuring that types act as both documentation and constraints.

主な機能

Enforces 'type' over 'interface' for superior composition and safety
Standardizes naming conventions for Options, Results, and State types
Guides explicit async/await usage and strict type safety enforcement
Promotes immutability through Readonly types and functional patterns
Integrates the Functional Core, Imperative Shell (FCIS) architecture
45 GitHub stars

ユースケース

Establishing a rigorous house style for new TypeScript projects
Reviewing complex PRs for adherence to strict naming and implementation patterns
Refactoring legacy code into a functional, type-safe architecture

概要

主な機能

Enforces 'type' over 'interface' for superior composition and safety
Standardizes naming conventions for Options, Results, and State types
Guides explicit async/await usage and strict type safety enforcement
Promotes immutability through Readonly types and functional patterns
Integrates the Functional Core, Imperative Shell (FCIS) architecture
45 GitHub stars

ユースケース

Establishing a rigorous house style for new TypeScript projects
Reviewing complex PRs for adherence to strict naming and implementation patterns
Refactoring legacy code into a functional, type-safe architecture