The goal of this library is to provide portable Common Lisp facilities for working with CLOS instances. This first release is minimal because I'm following my usual MO of only implementing things as I need them. There is therefore no call for me to go beyond slot-names, map-slots, shallow-copy and deep-copy yet (and I've used deep-copy in exactly one place so far, so be wary of that one; the others have been at least slightly battle-tested).
Github page here, which includes use and project documentation in markdown format.
ASDF-install package (obsolete) http://asdf.inaimathi.ca/cl-mop.tar.gz (That's still the latest link. No idea why it says "obsolete")
No GPG keys, so download the above at your own risk.