By extending the six-dimensional hybrid formalism for the superstring to include d = 6 \( \mathcal{N} \) = 1 superspace variables along with unconstrained bosonic ghost fields, we construct a manifestly spacetime supersymmetric vertex operator U. We demonstrate that the BRST invariance of U implies the d = 6 \( \mathcal{N} \) = 1 SYM equations of motion in superspace. Furthermore, we show that spacetime supersymmetric scattering amplitudes can be computed in a manner analogous to that of the non-minimal pure spinor formalism.
