Avoiding Melacha on Motzei Shabbos-Women Sewing:
Some Poskim write it is customary for women to avoid doing Melacha throughout the entire duration of Motzei Shabbos. However, this custom is negated by the Yerushalmi, was omitted by Admur, and is no longer the accepted custom, and therefore so is the practical ruling that it is not necessary to be careful in this matter. Nonetheless, some have a custom to avoid writing Safrus on Motzei Shabbos. Others avoid any laborious work done for payment the entire Motzei Shabbos. Others avoid sewing on Motzei Shabbos. [Practically, each family is to abide by their tradition, and those who avoid sewing are to continue to avoid doing so, while those who do not have such a tradition, may continue to sew on Motzei Shabbos.]
The Chabad custom: According to Admur in his Shulchan Aruch there is no need for women to avoid doing any Melacha, even sewing, on Motzei Shabbos. Nonetheless, some testify that the established Chabad tradition dating back to Russia is for women to avoid sewing on Motzei Shabbos. Others however claim to be unaware of such a custom in Chabad.
 See Aruch Hashulchan 299:22; Piskeiy Teshuvos 300:6
 M”A 299:15 in name of Abudarham end of Seder Motzei Shabbos; Elya Raba 299:23 in name of Tashbeitz that so is the custom of the world to not do Melacha throughout the entire Motzei Shabbos
 Yerushalmi Pesachim 4, Perek Hamakom Shenahagu Halacha 1, brought in Tur 299 and M”A 299:15, “Women who are accustomed to not do Melacha on Motzei Shabbos are not fulfilling a custom”
 It is omitted likewise in the Mishneh Berurah
 Aruch Hashulchan 299:22; Nesiv Hachaim; Torah Lishma 79
 Based on testimony of Leket Yosher p. 58 in name of Terumos Hadeshen
 Tosefes Shabbos 299:18; See Piskeiy Teshuvos 300:6
 Makor Chaim of Chavos Yair 300; Piskeiy Teshuvos 300:6 that so is custom in many communities; Received from HaRav Eliyahu Landa Shlita that so is the explicit Chabad tradition for women to avoid sewing on Motzei Shabbos; Rivivos Efraim 2:107 that so is custom of many; Shulchan Halevi that the custom only applies until midnight
 As Admur 299:20 rules that the statement of the Gemara against doing work on Motzei Shabbos applies only until Maariv is finished in Shul.
 Received from HaRav Eliyahu Landa Shlita
 Received from HaRav Leibal Groner Shlita