avoid-unnecessary-type-params

SKILL.md

The "Golden Rule of Generics" states that type parameters should appear twice or more in a function signature. If a type parameter only appears once, it's not relating anything and is likely unnecessary. Unnecessary type parameters create a false sense of type safety and can make inference less successful.

This skill helps you identify and eliminate superfluous type parameters, resulting in cleaner, more maintainable code that TypeScript can infer more effectively.

Type parameters must appear twice or more to establish a relationship. If a type parameter only appears once, strongly reconsider if you need it.

在編寫泛型函數或類型時使用。在檢查類型簽名時使用。當類型參數僅出現一次時使用。當想要添加泛型以實現“靈活性”時使用。 來源：marius-townhouse/effective-typescript-skills。

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