context-type-inference

SKILL.md

Separating a value from its context can cause type errors.

TypeScript infers types based on both the value AND where it's used. When you extract a value to a variable, you lose context, which can cause surprising type errors.

Note: as const makes it readonly. If the function expects a mutable tuple, this won't work:

当提取值导致类型错误时使用。当回调类型错误时使用。当需要 const 断言时使用。 来源：marius-townhouse/effective-typescript-skills。

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