The Activity Heatmap Plugin for Obsidian provides a visually engaging way to track your note-taking habits over time. Inspired by GitHub's activity heatmap, this plugin displays a calendar-style heatmap that shows your writing and vault changes. It logs file changes by tracking metrics like file size and word count, updating the heatmap automatically in the background. Users can easily access the heatmap via a ribbon icon or the command palette, and can configure the view to show different metrics or time periods, such as the past year. This plugin is ideal for those who want to visualize their productivity patterns and stay motivated by seeing their progress in a colorful, easy-to-read format.