Extended action and master square

Degree zero in antifields is the constructed action variation. Degree one vanishes by the inherited nilpotence of $s_0$ on generators. Degree at least two is absent by the truncation ${S^{\prime }}_{\ge 2}=0$. The graph-to-action vertex identification stays unsettled. Free action, gauge fixing, $K=-\square \mathcal{P}$, and the propagator interface are normalization inputs under N-Normfree, which is constructed. They are not a graph closure.