1)
Why does it repeat here that Hashem gave Chachmah to Shlomo?
1.
Radak: In most of the buildings that he built, his Chachmah was seen, like it says "and Malkas Sheva saw all the Chachmah of Shlomo, and the house that he built?" (10:5-6).
2.
Malbim: This teaches that the love between Shlomo and Chiram was not due to Chiram's love for David, rather, due to Shlomo's Chachmah. Chiram made Shalom with David because David was a warrior who conquered lands, and Cherem needed his help. His Shalom with Shlomo was due to his Chachmah; therefore, he added a Bris of love.
