Oh duh, az.summary() does have a lot of this already! I could really simplify this 
But it does not have everything.Consider these visual checks that are only currently accomplished visually:
- Consistent trace plots showing ‘k’ traces mostly shaped the same.
- Uniformity of rank plots.
- Autocorrelation plots…“look” reasonable. Not even sure how I make this judgement but I definitely know I should be looking at them.
These things seem to require more data, and more complex logic, than checking az.summary().