Currently, one of the two custom off topic reasons for CR is:
Questions must contain working code for us to review it here. For questions regarding specific problems encountered while coding, try Stack Overflow.
Technically, this does include questions that don't include code at all, or just link to it (latest example), but I think it's confusing in those cases, especially the emphasis on “working” (which makes sense in other cases).
Do you think it would be worth it to have a separate close reason for this case? Or should I just use the free-text option?