A bit of a nit, but should the implementation & docs for the "does" opcode be moved to the "pmc" file rather than the "object" file, since this is something available to every PMC? If so, I can move it over.
I've also submitted a patch to the parrotcode site that adds the documentation for "classes/pmc2c2.pl", as this contains the docs for how to seed the information for "does".
(I've updated Tcl locally to use 'does', thanks for the pointer, Leo.)