excess-property-checking

SKILL.md

Object literals get special treatment: TypeScript flags unknown properties.

This catches typos and mistakes that structural typing would miss. But it only applies to object literals - understanding this distinction prevents confusion.

When you see "Object literal may only specify known properties", you've triggered excess property checking.

将对象文字分配给类型化变量时使用。当被“未知属性”错误迷惑时使用。当在对象字面量上标记额外属性而不是变量时使用。 来源：marius-townhouse/effective-typescript-skills。

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