In 2000, Francis Tuerlinckx and I published our paper on Type M and Type S errors.
In 2014, John Carlin and I published a paper on the topic with a increasingly unromantic focus, including an R function “retrodesign” for computing these error rates given assumptions.
In 2019, Andy Timm improved the function and put it on CRAN.
Since then, Timm and Martijn Weterings found some small problems. They stock-still and updated the retrodesign package, and it’s right here on CRAN again.
I hope you find it useful.