Rewrite a technical brief for a site-planning engine

An engineering-led product team needs an urgent rewrite of a technical brief for a site-planning engine. The existing document is fragmented and leaves too much room for interpretation across product, AI, and implementation teams. The revised brief should define the user problem, inputs, decision logic, constraints, edge cases, and measurable acceptance criteria. The result should give a delivery team one dependable source of truth for the next exploratory build cycle.