  Generalizing recent work by Schnabl-Stettinger and Erbin-Firat, we outline a
universal algebraic procedure for `adding stubs' to string field theories
obeying the BV quantum master equation. We apply our results to classical and
quantum closed string field theory as well as to open-closed string field
theory. We also clarify several aspects of the integration-out process in the
co-algebraic formulation of string field theory at the quantum level.
