Okay, this kata should be sent to draft, because the reference solution doesn't even cohere to the description:

• Reference solution considers "balanced hand" to be no voids, no singletons, no five-card majors. This is not the standard definition of a balanced hand (no voids, no singletons, at most one doubleton)
• Description on 2C rule is wrong: see issue below
• Weak Two Bid rule is wrong: see issue below. Even then, the random test almost never hits this case, so this needs to be specifically tested
• Minor opener description is complete garbage: it does not specify the actual bidding rule other than 3-3 and 4-4, which is open 1D/1C if 3+ D/C cards, take the longer suit, then suit rank if equal
• Reference solution expects wrong minor opener when there are 5-5/6-6 D/C cards respectively (expects 1D instead of 1C, which is the higher suit)
• Bidding rule precedence is completely different from the order specified by the description: precedence taken by the reference solution is NT > 2C > Major opener (longest suit > highest suit) > Minor opener (4-4 > 3-3 > longest suit > highest suit), which I don't think is correct in practice

With 22+ points and an unbalanced hand, open 2C

In the actual tests AC KD KC AD 5S TH 9D 2H TS AH KS 2C JS expects 2C, but this is a balanced hand (4-3-3-3).

Notrump openings show a balanced hand and can be made with a five-card minor suit

The current version of SAYC says Notrump openings show a balanced hand and may be made with a five-card major suit or a five-card minor suit. Notably, suits are not limited to minor suit.

(I think most SAYC variants does this as well AFAIK)

The description is only describing part of the actual bidding rules: rules for pass aren't explained. Are we supposed to pass when no bidding criteria are met?

Also, what was the suit order again? It is not universally DCHS in every card game.