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Damage Model

Damage describes which grid regions may have changed after applying RenderOps.

Damage is conservative: - Regions reported may have changed. - Regions not reported did not change.

Full Redraw

When damage fragments exceed thresholds, damage escalates to full redraw.

Backends must repaint the entire grid when full_redraw is true.

Geometry Guarantees

Damage rectangles are: - Axis-aligned - Bounded to valid grid coordinates

Overlap is permitted. Rectangles are not required to be minimal.