FR-DEV-19a said a part is added to the mask or taken out of it, and
mask-editing.md listed Intersect as an M2 item with nothing built. Both
now say what shipped: the requirement names the third join and why it is
a product rather than a minimum, and how old and new sidecars read across
it; the plan marks the blend-table row built, names the tests that hold
the GPU to the definition, and splits M2 into what is done and what is
still outstanding (joining non-painted parts from the panel, per-part
distance fields, folding two layers).
dtourolle
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