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structural-typing

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Rely on shape, not identity, in TS types.

Software Engineering#typescript#testing#mocks#interfaces#type-safety#structural-typing#object-shape
Authorluyi985
Version1.0.0
Installs0

System Documentation

What problem does it solve?

Structural typing in TypeScript can lead to surprises when objects with extra properties are still assignable to a type, causing implicit brittleness in code. This skill helps you reason about types by their shape rather than their nominal identity, reducing surface-area surprises.

Core Features & Use Cases

  • Understand the difference between structural and nominal typing and why extra properties are allowed.
  • Apply the concept when designing interfaces and function parameters, and when writing unit tests with mock objects.
  • Use real-world examples to reason about type compatibility and to prevent accidental bugs.

Quick Start

Validate a sample object against a target interface by checking that it has the required properties.

Dependency Matrix

Required Modules

None required

Components

Standard package

💻 Claude Code Installation

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Please help me install this Skill:
Name: structural-typing
Download link: https://github.com/luyi985/lyi-bash/archive/main.zip#structural-typing

Please download this .zip file, extract it, and install it in the .claude/skills/ directory.
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