Thank you for the clear use cases! I'm impressed you've gotten ap_pipe to work with HSC data.
It looks like you ran ap_pipe on lsst-dev, but I'm not sure what working directory you were in, and I'd like to take a look at the actual processed images if possible. Can you please point me to somewhere I can see them?
I may be missing something, but it looks like you moved some critical config info from ap_pipe into the dataset repo (i.e., ap_verify_hits2015) because it was DECam-specific. Did you generate a similar but HSC-style config file for refcats, filterMaps, etc. for your three use case test runs? I am concerned about requiring users to have a bunch of custom configs set in order to run ap_pipe at all, and I wonder if it would make sense for the obs_packages to have a set of default refcat/filterMap configs that advanced users may choose to override.