The Shulchan Aruch of the Admor HaZaken (the Alter Rebbe, Rabbi Shneur Zalman of Liadi) is a halachic work based on the standard Shulchan Aruch, authored by Rabbi Yosef Karo, but with additional rulings and clarifications. The Alter Rebbe’s version is known as the Shulchan Aruch HaRav and is widely studied and followed, especially within Chabad and other Chassidic communities.
Rabbi Shneur Zalman composed this work to provide a clear, precise, and accessible code of Jewish law. It incorporates his deep understanding of both Nigleh (revealed Torah) and Chassidus (the mystical dimensions of Torah) and covers all aspects of daily life, prayer, holidays, and more, often bringing unique insights and rulings.