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Abstract: Core-collapse supernova remnants (SNRs) offer a powerful diagnostic of massive-star evolution and explosion physics. Their complex morphologies and chemical inhomogeneities retain signatures of the supernova (SN) engine, including asymmetries, nucleosynthetic yields, and compact-object formation. In young remnants (<5000 years), the debris still preserves this early “memory”, while the large-scale structure reflects interactions with the circumstellar medium (CSM) shaped by