Convert TypeScript wrapper types to lowercase primitive types.
npx skills add https://github.com/luyi985/lyi-bash --skill avoid-wrapper-types
Please help me install this Agent Skill. Skill: avoid-wrapper-types Source: https://github.com/luyi985/lyi-bash/tree/main/ai/skills/avoid-wrapper-types Command: npx skills add https://github.com/luyi985/lyi-bash --skill avoid-wrapper-types
This skill helps prevent the misuse of object wrapper types in TypeScript by promoting lowercase primitives and explaining auto-boxing and common pitfalls.
Replace wrapper types with primitive types in your TypeScript codebase.
High-intent search queries and answers about installing and using this skill.
Wrapper types like String and Number cause type-safety issues in TypeScript because they are objects, not primitives, leading to unpredictable identity checks and runtime behavior due to auto-boxing. Using lowercase primitives enforces strict type consistency.
The difference between primitive types and wrapper types in TypeScript is that primitives (string, number, boolean) are immutable values, while wrappers (String, Number, Boolean) are objects. Primitives avoid auto-boxing pitfalls and ensure reliable type checking.
To convert wrapper types to primitive types in a TypeScript codebase, replace uppercase wrappers like String, Number, and Boolean with their lowercase equivalents. This refactoring enforces type-safety and prevents runtime identity issues.
You should avoid using object wrapper types in JavaScript and TypeScript whenever you need primitive values. Wrappers cause strict equality checks to fail and introduce unnecessary object overhead, making lowercase primitives the safer choice.
TypeScript auto-boxing temporarily wraps primitive types for method calls but does not affect equality checks for the primitives themselves. However, explicitly using wrapper types breaks identity comparisons because it creates distinct object instances.
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