mwg API
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    Type Alias AreaShape

    AreaShape:
        | { kind: "single" }
        | { kind: "burst"; radius: number }
        | { kind: "line" }
        | { kind: "cone"; width: number }

    How a target resolves into the cells it actually affects.

    single is a dagger throw or a bolt from a wand - only the cell aimed at. burst is an explosion or a cloud, centred on the target rather than the thrower. line is a beam or a spear thrust - everything between thrower and target, not just where it lands. cone is a breath or a spray - widening with distance along the aim direction, width counting how many cells wide the far end is.