Why did Joseph insist that the gid hanasheh be removed from the meat in front of the brothers, but did not insist that the slaughter itself be performed in front of them?

This source-based Torah study examines: Why did Joseph insist that the gid hanasheh be removed from the meat in front of the brothers, but did not insist that the slaughter itself be performed in front of them? It follows the canonical Hebrew discussion through the parasha and classical Jewish sources. This localized discovery layer is a concise summary rather than a full translation of the article; practical, halakhic, medical, legal, historical, mystical or empirical claims remain source-framed and subject to the canonical review status.