- vibetyper/msty-studio: unversioned AppImage URLs → HEAD/Last-Modified
check via custom update.sh, refreshes sha256 when upstream binary changes
- zellij-ps: switch to branch-tracking (master tip via Gitea API) since
helper-scripts repo has no tags
- all three expose passthru.updateScript so the existing CI workflow
discovers them via is_custom_update_script
