One dropdown of canvas group names (filled on demand by a "re-scan groups" button, exact match, all same-named groups targeted) plus a bypass toggle that sets the nodes inside the chosen group(s) to BYPASS / ALWAYS. Pure frontend virtual node (no Python class), works in both the classic canvas and Nodes 2.0. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>