¿Cómo definir un rectángulo biselado como .pic en tikz?

Question

Estoy intentando generar un diagrama que contenga repetidamente los mismos gráficos. Vea a continuación un gráfico de muestra:

Así lo estoy generando:

\documentclass[tikz, border=2px]{standalone}
\usetikzlibrary{shapes.misc, shapes.geometric}

\begin{document}
\tikzset{
    line/.style={-, draw=black!30, line width=1pt},
}

\begin{tikzpicture}[node distance=2cm]
    \node[draw=black!30, rectangle, minimum height=8mm, minimum width=8mm,line width=1pt, chamfered rectangle,chamfered rectangle corners={south west, south east},chamfered rectangle xsep=2pt, below] at (0, 0) (b1) {} ;
    \node[draw=black!30, rectangle, minimum height=8mm, minimum width=8mm,line width=1pt, chamfered rectangle,chamfered rectangle corners={south west, south east},chamfered rectangle xsep=2pt, below] at (1, 1) (b2) {} ;
    \node[draw=black!30, rectangle, minimum height=8mm, minimum width=8mm,line width=1pt, chamfered rectangle,chamfered rectangle corners={south west, south east},chamfered rectangle xsep=2pt, below] at (0, 2) (b3) {} ;
    \draw[line] (b1) -- (b2) -- (b3);
\end{tikzpicture}
\end{document}

Deseo definir el rectángulo biselado como .pic para poder usarlo más adelante con \pathel comando.

Estoy buscando algo como esto:

\tikzset{
line/.style={-, draw=black!30, line width=1pt},
box/.pic={
    \draw[draw=black!30, rectangle, minimum height=8mm, minimum width=8mm,line width=1pt, chamfered rectangle,chamfered rectangle corners={south west, south east},chamfered rectangle xsep=2pt, below] (0, 0);
    },
}

\begin{tikzpicture}[node distance=2cm]
    \path[line] (0, 0) pic {box} --
                (1, 1) pic {box} --
                (0, 2) pic {box};
\end{tikzpicture}

Answer 1

¿Estás buscando algo así?

\documentclass[tikz, border=2px]{standalone}
\usetikzlibrary{shapes.misc, shapes.geometric}

\begin{document}
\tikzset{
    line/.style={-, draw=black!30, line width=1pt},
}

\begin{tikzpicture}[mycham/.style={draw=black!30, rectangle, minimum height=8mm,
minimum width=8mm,line width=1pt, chamfered rectangle,chamfered rectangle
corners={south west, south east},chamfered rectangle
xsep=2pt},pics/champic/.style={code={\node[mycham] (-node){};}}]
    \path (0, 0) pic (b1) {champic}
    -- (1, 1) pic (b2){champic} 
    -- (0,2)  pic (b3){champic};
    \draw[line] (b1-node) -- (b2-node) -- (b3-node);
\end{tikzpicture}
\end{document}

Podrías definir elpic en este casotambién usando pics/champic/.style={code={\node[mycham] (-node){};}}. Sin embargo, AFAIK, esta sintaxis es menos flexible. Imagina que quieres pasar más de un argumento a la imagen, como en

\documentclass[tikz, border=2px]{standalone}
\usetikzlibrary{shapes.misc, shapes.geometric}

\begin{document}
\tikzset{
    line/.style={-, draw=black!30, line width=1pt},
}

\begin{tikzpicture}[mycham/.style={draw=black!30, rectangle, minimum height=8mm,
minimum width=8mm,line width=1pt, chamfered rectangle,chamfered rectangle
corners={south west, south east},chamfered rectangle
xsep=2pt},pics/champic/.style n args={2}{code={\node[mycham,#2] (-node){#1};}}]
    \path (0, 0) pic (b1) {champic={A}{blue}}
    -- (1, 1) pic (b2){champic={B}{red}} 
    -- (0,2)  pic (b3){champic={C}{green!70!black}};
    \draw[line] (b1-node) -- (b2-node) -- (b3-node);
\end{tikzpicture}
\end{document}

Como puedes ver, con la sintaxis elegida aquí esto no es problema, pero con la /.pic=sintaxis no sabría cómo hacerlo.

Por supuesto, si no tiene parámetros y está seguro de que nunca los necesitará, puede hacerlo

\documentclass[tikz, border=2px]{standalone}
\usetikzlibrary{shapes.misc, shapes.geometric}

\begin{document}
\tikzset{
    line/.style={-, draw=black!30, line width=1pt},
}

\begin{tikzpicture}[mycham/.style={draw=black!30, rectangle, minimum height=8mm,
minimum width=8mm,line width=1pt, chamfered rectangle,chamfered rectangle
corners={south west, south east},chamfered rectangle
xsep=2pt},champic/.pic={\draw (0,0) node[mycham] (-node){};}]
    \path (0, 0) pic (b1) {champic}
    -- (1, 1) pic (b2){champic} 
    -- (0,2)  pic (b3){champic};
    \draw[line] (b1-node) -- (b2-node) -- (b3-node);
\end{tikzpicture}
\end{document}

como sugieres.