[Avodah] 2 Women working on Rosh Chodesh questions

[Rich, Joel]

1. While the Shulchan Aruch Mentions the practice of women not working on Rosh Chodesh in oc 417,His wording was of particular interest    I have not found this practice mentioned the Rambam but was wondering if anybody else is aware of him mentioning it. 

2. Also rashi in Megilah 23b sv rashei chadashim is interesting -do  We have any idea who ended the parentheses quoting Tosafot? I also assumed that Rashi goes on at such length because there is no source in the bavli that talks about women only not doing work then.

 As always any insights appreciated 
> 
> Kt
> Joel
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