  In this paper I study Wilson line operators in a certain type of split
Chern-Simons theory on a manifold with boundaries. The resulting gauge theory
is a 3d topological BF theory equivalent to a topologically twisted 3d
$\mathcal N=4$ theory. I show that this theory realises solutions to the
quantum Yang-Baxter equation all orders in perturbation theory as the
expectation value of crossing Wilson lines.
