/qstack-update-plan-assets
Use the update workflow owned by qstack-plan-to-html, the package that also
owns the source template and deterministic update script.
Resolve this skill's directory through its real path. Then resolve the sibling
qstack-plan-to-html/references/update-plan-assets.md, read it completely, and
follow it. Do not assume either skill was installed under a fixed home
directory.
If that reference, its script, or its source template is unavailable, report that the updater installation is incomplete and stop without editing the target.