- Define a magic word like __AMBIGUOUSPAGE__, which would be included in
{{disambig}} on Wikipedia.
- Flag pages containing this magic word (schema change, I believe?)
I think that would require disambig to be substed. Probably better to use AWB to add the magic word to every page in the appropriate category, and then change the instructions for creating disambig pages. And yes, I expect that would require a schema change - I don't think there's an existing field you could use (perhaps the schema change should be adding a fairly large bit field to the articles/revisions table(s) so people can add properties like this without needing to add a new field each time, they could just change a text file somewhere which describes what all the bits mean).