RecruitingPhase 2Drug trialOptimize Neoadjuvant Therapy in HER2-Positive Early-Stage Breast CancerThis is an open-label phase 2 study to evaluate the pCR rate in patients diagnosed with HER2 positive breast cancer treated on an adaptive clinical trial design. Tumors will undergo testing using a novel molecular phosphoprotein-based biomarker assay, HER2 Activation Response Predictive Signature (HARPS) to identify HARPS-positive breast cancers. To assess 3-year invasive disease-free survival (iDFS) in patients with HARPS-positive and HARPS-negative HER2-positive breast cancer. To correlate changes in ctDNA with treatment outcomes in patients with HARPS-positive and HARPS-negative HER2-positive breast cancer. To understand the changes in quality of life (QOL) measure in patients with HARPS-positive HER2-positive breast cancer treated using an adaptive neoadjuvant trial design.