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I strongly dislike 3♣ for a number of reasons. The most concerning is when LHO makes a call of some number of hearts. Now partner does not know we have support, and cannot evaluate his hand properly... That means we're going to have to make a very difficult guess later. The next is that you won't be able to get much useful information from partner, and the later 4♠ bid will pre-empt any further slam investigation. 3♥ describes the hand very well, and is the correct bid IMO. 3♣ is forcing here, if you have a weaker hand with clubs, you have to pass and wait for partner to reopen. Sometimes you'll miss partscores, but overall playing 3♣ as forcing makes life MUCH easier when it's important. As you said in your original post, 4♠ shows a hand that would accept an Invite. If partner had a hand that would have slam opposite a hand better than an invite, they have a lot of bids between 3♥ and 4♠ to show that. Therefore, partner is limited. I don't want to define limited by HCP, since that isn't accurate. Partner is limited in that they thought that opposite most normal (12)13-15 raises, they don't want to be in slam... But opposite a 10-11(12) raise they want to be in game. If you think about your relative strength compared to what you have shown, and bids available to partner before making a move over a signoff by partner, it will improve your slam bidding a lot. Here you have shown a decent 10 count or better with 3 card or better support... Your hand isn't too much more than that. Yes, it's got quick tricks, but the small doubleton heart, only three trumps, and lack of club interiors makes this hand not worth more than a minimum GF raise, which will be happy to pass partner's 4♠ call.

I agree with 3♥ and Pass now. There are still a lot of bids between 3♥ and 4♠ that partner could have made to show more slam interest.

3♥ gets your hand across in 1 bid and is 100% correct, this doesn't mean that 3♣ might not work better sometimes, but keep the things simple, its still a balanced hand with support. 4♠ shows a hand that is worth game opposite an invite, but nothing extra, partner had room to bid 4♣/♦ but decided not to, we don't have enough extras to move on.

For the people who have not defined their system, the system is undefined. The question was not 'what would you assume from a pickup partner?'. If that were the question, the answer is unfortunately quite sad - it is very little that you can assume, and in general you can expect at least five bidding misunderstandings a session, and so on, and so forth. So what? SAYC is defined by an ACBL booklet, readily available online. As several people have suggested in these forums, there are at least a few situations that are undefined or defined in contradictory manner in the booklet. However, it is made clear that a 2/1 bid promises another bid, therefore for example 2NT in the second round by opener cannot be passed, and 2♦ by opener cannot be passed. People who are playing 2NT nonforcing by opener or 2♦ nonforcing by opener, and have express agreements about this are not playing SAYC. People who say they are playing SAYC but have never read the booklet and do not know the definitions are playing a partial SAYC fantasy variation or are failing to play SAYC properly.

I choose a double now, but agree it is a bare minimum and I might pass next time. Don't understand gnasher's view.

3♣ is bad in my opinion. It is a game-forcing bid but I don't think the suit is long/good enough to be shown. 3♥ is better, well done. 4NT is silly. Partner does not have slam interest opposite most 3♥ bids, and you have two small hearts. You are not that far from minimum. It's high time to pass.

I would suggest it is non-trivial as to which is the important feature of South's hand to show, the good club suit or the spade support. Depending upon how the ensuing suction develops (west bidding 4H for example) either might have been right. Thus neither 3C nor 3H are wrong but rather a matter of style. One option with the South hand would have been a response of 4C which (if agreed) shows spade support and a good club suit and the (offensive) strength for 4S. Many insist on 4 spades for this bid though. Another systematic point that can be very useful on auctions like this is the serious/frivolous 3NT. An example response structure on this auction for North's rebid might be: 3S = min 3N = enough for game and decent slam hand (frivolous 3NT) 4C/D/H = significant extras, cue bid 4S = enough for game and poor slam hand The key in any response structure over an open-ended raise is for partner not to jump without a good reason, thus allowing space for those occasions when the raiser has extra values.

Who plays scrambling here? That sounds like resulting because Lebensohl is much more frequent. In that case you're booked for a bad MP score anyway, as it's going to be quite hard to play 3♣ on a Lebensohl scenario (maybe you'll get to play 4 if lucky). I'll chalk this up on "preempts work".

I am glad to hear it! I have come to see Facebook as annoying and the thought of seeing a movie about what a great idea it is seemed unbearable.

Barring special agreements then both minors.