Supernovae with the Square Kilometre Array

This chapter presents the science potential of the Square Kilometre Array (SKA) for studying all classes of supernovae and their environments. It substantially updates and extends the earlier work of Perez-Torres et al. (2015), originally published in the 2015 Advancing Astrophysics with the SKA (AASKA14) volume, reflecting the dramatic progress in time-domain astronomy and radio instrumentation over the past decade. We outline how SKA1 and its pathfinders will transform the radio study of core-collapse supernovae (CCSNe) through sensitive, commensal wide-field surveys capable of discovering hundreds of events per year, providing a dust-unbiased census of massive-star deaths and direct measurements of the volumetric CCSN rate. The same data will probe ejecta-circumstellar medium (CSM) interaction, shock microphysics, and progenitor mass-loss histories. Deep, triggered observations of thermonuclear supernovae (SNe Ia) will allow the SKA to test competing progenitor scenarios by detecting -- or definitively excluding -- the prompt radio emission expected from single-degenerate systems. The chapter further explores superluminous supernovae (SLSNe), delayed interaction supernovae and synergies with facilities such as ALMA, ngVLA, CTA, IceCube-Gen2, and ULTRASAT. Collectively, these studies will turn radio supernova astrophysics from a discovery-limited field into one governed by population statistics.