Your agent should confirm the builder is enrolled with a licensed new home warranty provider and understand what that warranty covers: most programs give full coverage on defects in the first 1 to 2 years, then narrow to major systems and the structure for years 3 through 10.
Possession date protection matters more here than on a resale. New construction possession dates slip more often than resale ones, so your agent should push for contract language that addresses a delayed possession rather than assuming the builder's estimated date is firm.
A builder's sales representative works for the builder, which is exactly why your own agent's review of the contract terms matters on new construction. Get your hand-reviewed valuation from Joel Dyck.