  Let $p$ be a prime. We characterize the oriented right-angled Artin pro-$p$
groups whose $\mathbb{F}_p$-cohomology algebra yields no essential $n$-fold
Massey products for every $n>2$, in terms of the associated digraph. Moreover,
we show that the $\mathbb{F}_p$-cohomology algebra of such oriented
right-angled Artin pro-$p$ groups is isomorphic to the exterior Stanley-Reisner
$\mathbb{F}_p$-algebra associated to the same digraph. This work also aims at
providing a concrete and group-theoretic introduction to the study of Massey
products in Galois cohomology for non-specialists, especially graduate students
working in profinite group theory.
