  Spin correlations of $\Lambda$-hyperons embedded in the QCD strings formed in
high energy collider experiments provide unique insight into their locality and
entanglement features. We show from general considerations that while the
Clauser-Horne-Shimony-Holt inequality is less stringent for such states, they
provide a benchmark for quantum-to-classical transitions induced by varying i)
the associated hadron multiplicity, ii) the spin of nucleons, iii) the
separation in rapidity between pairs, and iv) the kinematic regimes accessed.
These studies also enable the extraction of quantitative measures of quantum
entanglement. We first explore such questions within a simple model of a QCD
string composed of singlets of two partial distinguishable fermion flavors and
compare analytical results to those obtained on quantum hardware. We further
discuss a class of spin Hamiltonians that model the dynamics of $\Lambda$ spin
correlations. Prospects for extracting quantum features of QCD strings from
hyperon measurements at current and future colliders are outlined.
