Bidding:
p-p-p-1nt;
p-2♣-dbl-2♥;
p-p-3♣-?
My partner & I had a disagreement about this board.
Systemically, stayman promised no values, it can be weak with both majors, or weak 3 suiter with short clubs. His pass of 2♥ therefore limits hand to ~0-10. After East bids 3♣, is South supposed to pass or double here?
My contention is South should pass, because partner can be rather weak, and should be allowed to defend 3c undoubled. This could be your par spot (well, having failed to pass it out); 3h could go for 200 doubled or undoubled, opps could be +110. If North had a maximum 9/10 count, four hearts, he can double, and South could pass this hand, but pull with something more like KQx KQxx Axxx xx. Am I out to lunch here? How much effect is there on your choices because this is a 4th seat opener, opps probably limited to ~21 or so, at least if they have an average 1st/3rd seat opening style?
Side question: should opener bid 2♥ over the double, pass, or redouble? What should each action show & deny?

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