Consider adding trankplots for parameters etc.

[danlwarren]

https://arxiv.org/pdf/1903.08008

https://bookdown.org/content/4857/markov-chain-monte-carlo.html

These seem like a very useful alternative visualization of MCMC outputs, and fairly easy to implement. It's basically just ranking all estimates for a parameter across all chains, then plotting superimposed histograms of ranks on a per-chain basis. If chains are drawing from the same distribution, the histograms should be relatively uniform and similar between chains.