upstream is configured and both tags are fetched, so updates can finally be looked at
as a diff. The first diff disproved what this issue and the fork doc have both said
since August: the import is not the v1.12.17 tag. 783 files differ, 115 exist only on
our side, and two of them date the tree - TextualBodyViewModel.tsx and
RovingTabIndex.tsx are absent from the tag, present in v1.12.26 and present in our
import. The changelog stops at 1.12.17 only because it is written at release time.
So the base is a develop state after the 1.12.17 release. Fittingly it is the MVVM
files that prove it - the area this issue already warned about.
Step 3 changes accordingly: grafting onto v1.12.17 would put every future merge on an
invented ancestry, and worse than raising false conflicts, it could hide real ones.
Finding the actual ancestor means searching develop history, which needs the full
upstream repository rather than a shallow tag fetch.
The advisory assessment is unchanged - the base sits below 1.12.22 either way.