kind of my favorite part of Linkguard is snapshot mode. instead of only finding Wayback copies after a link dies, it asks Save Page Now to grab the working links that don't have a recent snapshot, so the copy already exists when the page goes away. first run is slow though, 100 links can take 15+ minutes
LinkguardLinkguard: link checker for static sitesA free GitHub Action that checks outbound links in Jekyll, Hugo and folderblog sites and finds Wayback Machine snapshots for dead ones.