  We generalize the Pastawski-Yoshida-Harlow-Preskill (HaPPY) holographic
quantum error-correcting code to provide a toy model for bulk gauge fields or
linearized gravitons. The key new elements are the introduction of degrees of
freedom on the links (edges) of the associated tensor network and their
connection to further copies of the HaPPY code by an appropriate isometry. The
result is a model in which boundary regions allow the reconstruction of bulk
algebras with central elements living on the interior edges of the (greedy)
entanglement wedge, and where these central elements can also be reconstructed
from complementary boundary regions. In addition, the entropy of boundary
regions receives both Ryu-Takayanagi-like contributions and further corrections
that model the $\frac{\delta \text{Area}}{4G_N}$ term of Faulkner, Lewkowycz,
and Maldacena. Comparison with Yang-Mills theory then suggests that this
$\frac{\delta \text{Area}}{4G_N}$ term can be reinterpreted as a part of the
bulk entropy of gravitons under an appropriate extension of the physical bulk
Hilbert space.
