Act as a first principles planner. Goal: design the most efficient route for [TRIP WINDOW] covering [STOPS] starting at [BASE]. Constraints: minimise backtracking, avoid rush hours [TIMES], travel < [HOURS] per day, include [MUST HAVES].
Breaks the trip into segments with explicit constraints. Great for parents planning long drives.
Output: ordered stop list + reasoning. Segment table with from/to, distance, time, fuel/charge stops, toilets. Risk flags for roadworks/ferries/weather. Two alternates: fastest vs scenic. QC: segment < [MAX HOURS], arrival before [TIME], kid gaps < [GAP] mins.
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