tuftex-sidenotes.sty

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{tuftex-sidenotes}[2023-06-20 package tuftex-sidenotes]

\RequirePackage{sidenotes}
\RequirePackage{tuftex-letterpaper}
%\RequirePackage{xparse} % I don't think we need this?
% we will use the sidenotes package to implement sidenote 
% and marginnote

% define fonts etc for sidenote use
% TODO right now it is hard coded for ragged right need to fix this
\NewDocumentCommand{\@tuftex@marginfont}{}{%
\normalfont\footnotesize\RaggedRight\@tuftex@MarginPar\unskip\ignorespaces%
} %\@tuftex@marginfont

% set marginpar font for use in sidenote=marginpar
%\let\oldmarginpar\marginpar
\NewCommandCopy{\@tuftex@old@marginpar}{\marginpar}

\RenewDocumentCommand{\marginpar}{om}{%
  \IfNoValueTF{#1}%
    {\@tuftex@old@marginpar{\@tuftex@marginfont #2}}
    {\@tuftex@old@marginpar[\@tuftex@marginfont #1]{\@tuftex@marginfont #2}}
} %\marginpar redefined

% also set marginnote to use marginpar font
%\renewcommand*{\marginfont}{\tufte@marginfont}
\RenewDocumentCommand{\marginfont}{}{\@tuftex@marginfont}

% redefine footnote to use sidenote
\RenewDocumentCommand{\footnote}{m}{\sidenote{\unskip #1}}

% redefine thanks to use sidenote
\RenewDocumentCommand{\thanks}{m}{\sidenote{\unskip #1}}