Embed an In-App Changelog Widget With a Single Script Tag

Developers who ship updates frequently often find that users remain unaware of new features, leading to higher churn and redundant support requests. A practical solution is embedding a 'what's new' widget directly inside the app using a single script tag, requiring no npm install or framework-specific SDK. The widget should render inside a Shadow DOM to prevent style conflicts and fail silently to avoid disrupting the host application. Writing clear, tagged update entries — labelled New, Fixed, or Improved — and publishing them regularly helps communicate product momentum to users. The author built a tool called Patchlog to implement this pattern, though the core approach is applicable to any changelog widget solution.