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Understanding the modification of jets and high-$p_T$ probes in small systemsrequires the integration of soft and hard physics. We present recentdevelopments in extending the JETSCAPE framework to build an event generator,which includes correlations between soft and hard partons, to study jetobservables in small systems. The multi-scale physics of the collision isseparated into different stages. Hard scatterings are first sampled at binarycollision positions provided by the Glauber geometry. They are then propagatedbackward in space-time following an initial-state shower to obtain theinitiating partons' energies and momenta before the collision. These energiesand momenta are then subtracted from the incoming colliding nucleons forsoft-particle production, modeled by the 3D-Glauber + hydrodynamics + hadronictransport framework. This new hybrid approach (X-SCAPE) includes non-trivialcorrelations between jet and soft particle productions in small systems. Wecalibrate this framework with the final state hadrons' $p_T$-spectra from lowto high $p_T$ in $p$-$p$, and and then compare with the spectra in $p$-$Pb$collisions from the LHC. We also present results for additional observablessuch as the distributions of event activity as a function of the hardest jet$p_T$ in forward and mid-rapidity for both $p$-$p$ and $p$-$Pb$ collisions.

A multistage framework for studying the evolution of jets and high-$p_T$ probes in small collision systems