3.1 Responses to 1♣

West	North	East	South
	1♣	Pass	?

1♦	4+ Diamonds, 4 (Ace)+ HCP, denies 4M unless game-force
1♥	4+ suit, 4 (Ace)+ HCP, may have longer diamonds
1♠	4+ suit, 4 (Ace)+ HCP, may have longer diamonds
1NT	6-9 HCP, denies 4M
2♣	5+ Clubs, 10+ HCP, forcing to 2NT or 3♣ by either hand, denies 4M
2♦	6+ Diamonds, 0-5 HCP, no Ace unless only card, denies 4M
2♥	6+ Hearts, 0-5 HCP, no Ace unless only card
2♠	6+ Spades, 0-5 HCP, no Ace unless only card
2NT	10-12 HCP, denies 4M, has good lead values (otherwise, bid 1♦ or 2♣)
3♣	5+ Clubs, 4(Ace)-9, no Ace unless only card, denies 4M
3♦	5+ Clubs, small singleton diamond, slam try
3♥	5+ Clubs, small singleton heart, slam try
3♠	5+ Clubs, small singleton spade, slam try
3NT	13-15 HCP, balanced hand, denies 4M, has good lead values
4♣	RKCB for clubs
4♦	Unused
4♥	7 Winners with hearts as trump, no void, no Ace outside of hearts
4♠	7 Winners with spades as trump, no void, no Ace outside of spades

Alternative

The range for the weak raise is too wide for comfortable decisions opposite, so we can use the jump shift to the other minor as a constructive raise.

2♦	5+ Clubs, 6-9
3♣	5+ Clubs, 4(Ace)-6