C[S@](=O)Cl means C[S@"LP"](O)Cl - that is, the lone pair, oxygen and chlorine appear anticlockwise from the carbon.
It's a possibly useful idea, but only provided that all issues can be resolved. If they can't then Stereochemistry should explicitly disallow the interpretation.
A suggestion:
It's a possibly useful idea, but only provided that all issues can be resolved. If they can't then Stereochemistry should explicitly disallow the interpretation.