I built a Krita plugin called Smart Segments that lets you easily select objects using Meta’s Segment Anything Model (SAM v2). Just run the tool, and it automatically finds everything on the current layer. You can click or shift-click to choose one or more segments, and it converts them into a selection. No more struggling with the magic wand or cutting stuff out by hand. It supports GPU and CPU, works on Linux and (hopefully) Windows, and macOS, and sets everything up on first run without needing to install anything manually. You can grab it here: GitHub - a904guy/Smart_Segments: KRITA Plugin - Smart Segments - Segment Anything Model 2
Screenshots showing usage available on on the link above.