Slacky is a Chrome add-on designed to improve the Slack experience by introducing useful features that streamline communication and content management. It offers capabilities such as automatically closing embed previews right after sending messages, allowing users to customize which embeds to remove based on personal preferences. This feature helps maintain a cleaner chat environment and reduces visual clutter during conversations.

Additionally, Slacky enables users to bypass the default prompt when opening links, allowing for immediate access in the browser. It also offers the functionality to export entire Slack channels and threads, making it easier to search through conversations or use the content in other applications. Moreover, it allows users to copy or send formatted PR messages from platforms like GitHub or Graphite directly to their Slack channels, enhancing productivity and workflow.