The costliest mistakes in preconstruction usually aren’t measurement errors — they’re missed scope buried in a spec section or a contract clause nobody read closely enough before bid day. These guides cover reading Division 1 requirements, catching hidden scope-of-work gaps in concrete and drywall/framing packages, tracking addenda as documents change, and analysing a contract (including AIA forms) before you sign. They also cover what comes after award: change order and unit-rate management, and navigating disputes when scope was missed anyway. Several walk through where AI genuinely speeds up document review versus where a careful read is still non-negotiable.