Support for changing the baseline

[bensteffan]

It seems that right now it is not possible to adjust the baseline of the picture produced by sseqpage. At least I couldn't find anything about this in the documentation, and naively adding baseline = ... to the options doesn't seem to do anything.

I'd like to request this as a feature. My main use case for this is aligning sseqpage with equation numbers in, say, an equation environment, but there should be other uses as well. Surely at some point someone is going to want to use a spectral sequence in line...

Here's a MWE of what I was hoping would work. I am running TeX Live 2025, LuaHBTeX 1.22.0.

\documentclass{article}

\usepackage{tikz}
\usepackage{spectralsequences}

\begin{document}
% this does not work, the baseline remains at the very bottom
\begin{equation}
	\begin{sseqpage}[baseline = (N.base)]
		\class (0, 0)
		\class[name = N] (0, 2)
	\end{sseqpage}
\end{equation}
% this works and sets the baseline of the whole picture to that of (N)
\begin{equation}
	\begin{tikzpicture}[baseline = (N.base)]
		\node[draw, circle] at (0, 0) {};
		\node[draw, circle] (N) at (0, 2) {};
	\end{tikzpicture}	
\end{equation}
\end{document}