Response-Potential Dynamics of an Electron-Like ECSM Packet

This paper reports the V7 response-potential dynamics test for the ECSM electron-like packet programme. Starting from a previously constructed qₑff ≃ -1 electron-like packet scaffold, the test applies weak external response potentials to a Dirac-like packet using a split-operator evolution scheme. The V7 result passes all 15 verdict criteria. The packet preserves its occupancy scaffold, inherited alpha/beta closure, norm, branch weights, and controlled negative-branch leakage. Under a weak linear response potential, the packet trajectory changes substantially and shows force/acceleration sign agreement in an Ehrenfest-like diagnostic. Under chi-deformed response-potential dynamics, transport changes systematically while conservation remains stable. The result does not claim recovery of the physical electron, exact Newtonian force law, or full electromagnetic gauge coupling. It establishes a narrower internal result: an electron-like ECSM Dirac packet can undergo weak response-potential dynamics while conserving branch structure. The associated reproducibility notebook is publicly available at: https: //github. com/asheldrick-research/ecsm-framework/blob/main/ECSMElectronLikePacketResponsePotentialV7. ipynb