  We study a four-dimensional domain wall in twisted M-theory. The domain wall
is engineered by intersecting D6 branes in the type IIA frame. We identify the
classical algebra of operators on the domain wall in terms of a higher vertex
operator algebra, which describes the holomorphic subsector of a 4d
$\mathcal{N}=1$ supersymmetric field theory, and compute the associated mode
algebra. We conjecture that the quantum deformation of the classical algebra is
isomorphic to the bulk algebra of operators from which we establish twisted
holography of the domain wall.
