Shabbat Chol Hamoed
Kabbalat Shabbat begins with Mizmor L’David, and not with L’chu Neranenah. Some begin with Mizmor Shir L’Yom Hashabbat. In Lecha Dodi, some say all the verses and some say only the first and last two. The Amidah is the usual Shabbat one, with the addition of Ya’aleh Veyavo.
According to most Chassidim, Shalom Alechem and Eishet Chayil (as well as all the other selections prior to Kiddush) are not recited. According to Chabad, Shalom Alechem and Eishet Chayil (as well as all the other selections prior to Kiddush) are recited in an undertone. And according to Minhag Ashkenaz, According to most Chassidim, Shalom Alechem and Eishet Chayil (as well as all the other selections prior to Kiddush) are recited as normal.
Kiddush is recited as on a regular Shabbat, with Leshev Basukkah added at the end.
In bentching, both Retzei and Ya’aleh Veyavo are recited, as well as both the Harachaman for Shabbat and Sukkot.
Most have the custom to say Hosha’anot on Shabbat and some, including Chabad, don’t.
Since it is Shabbat, all the additional Shabbat selections are mentioned in the Mussaf for Shalosh Regalim. If one did not make any mention of Shabbat in the middle Brachah, or if he mistakenly davened the regular Mussaf of Shabbat: If he did not yet finish reciting the second Yih’yu L’ratzon (at the end of the passage of Elokai N’tzor), he should return to the beginning of the middle Brachah (i.e. Atah Vechartanu). Otherwise, he must repeat Mussaf.
For the daytime Kiddush, everything prior to Kiddush is recited in an undertone, and Leshev Basukkah is recited before drinking the wine.
Vihi Noam and V’atah Kaddosh are not recited on Motzei Shabbat.
Havdallah is recited as on every Motzei Shabbat, followed by Leshev Basukkah. V’Yiten Lecha is recited in an undertone.
For those who don’t say Hosha’anot on Shabbat, on Sunday Chol Hamoed, one says the Hosha’anot one missed on Shabbat together with the one for Sunday, but one only makes one circuit around the Bimah.
