San Diego is adding policies aimed at preventing massive wildfires to the city’s blueprint for future development, which is referred to as a general plan. The policies, which will constitute a new wildfire planning section of the plan, cover everything from brush management guidelines to the use of fire-resistant building materials in dangerous areas. Many of the rules apply only to homes located on the edges of canyons or along San Diego’s dangerous urban wildland interface – where suburban neighborhoods bump up against undeveloped wilderness. The Planning Commission last week unanimously approved the new policies. They were OK’d in January by the state Board of Forestry and Fire Protection. The City Council is scheduled to approve them this spring.