Track add-building row-shape families

docs/rehost-queue.md

@@ -320,6 +320,12 @@ Working rule:
     show those observed add-building clusters have empty non-add-building companions, which biases
     the next source/trigger-kind pass toward a distinct add-building compact subfamily rather than
     a generic dispatch carrier reused by variable-band rows
+  - the descriptor-independent row-shape split is explicit now too:
+    the same cluster-counts surface reports normalized add-building row shapes.
+    Current targeted checks show `Texas Tea.gmp` on the one-row shape `[0:8:0]`, while
+    `Alternate USA.gmp` sits on the repeated three-row shape
+    `[0:8:-25,0:8:0,0:8:0]`; that gives the next pass a simpler shape-level discriminator even
+    when descriptor labels differ
   - the same probe now narrows the candidate runtime-effect set too:
     it reports which decoded records already carry grouped opcodes in the grounded
     `0x00431b20` dispatch strip; real `War Effort.gmp` currently narrows that to record indexes