If someone pledged money to a charity fund, may he fulfill the pledge through a fundraiser who receives a percentage, or should he give directly to the fund?

This source-based Torah study examines the question: If someone pledged money to a charity fund, may he fulfill the pledge through a fundraiser who receives a percentage, or should he give directly to the fund? The canonical Hebrew article develops the issue through the weekly Torah portion and the sources cited there. This localized discovery layer preserves the question and the source identity; it does not add any new halakhic, medical, legal, scientific, historical, theological, or empirical ruling or claim beyond the canonical Hebrew source.