# Observer Pattern

## Description
Define a one-to-many dependency relationship so that when one object's state changes, all dependent objects are notified and automatically updated.

## Use Cases
Load this skill when you need to solve design problems described by this pattern in your code.

## Guidelines
1. Analyze whether current code structure matches the pattern's intent.
2. Refactor or implement following the pattern's typical structure.
3. Ensure the pattern introduction reduces coupling or improves flexibility.

## Detailed Reference
For more details, diagrams, and code examples: [Observer Pattern - RefactoringGuru](https://refactoringguru.cn/design-patterns/observer)