Level-one N=2 steps exist

There exists an integer regional step at level $1$ with two elementary positions.

The skeleton is forced ($R=1$, $n=[1]$, $L=2$, $half=2$, parent $1+1+2=4$) and completed with a delta mass at one split, grade-matching delta profiles, and a large tolerance. This is the base point every copy-bound argument at $N=2$ must start from.

Formalization Note Explicit instance; the predicate is trivial so the source obligation is immediate.