Jeroen's three rulings on the zoom-ladder design pass, recorded as a
D-226 amendment: (1) 'we set a new BHAG so old restrictions are up for
debate' — the item-(d) ceiling opens for the Atlas windowed viewport
(below-quarter rungs gated on the T-1154 measurement pass; chunk/tile
still never a whole-body planetary layer); (2) planetary rung ships as
progressive capped-density tiling on the generalized district_window
carrier; (3) planetary->regional entry becomes continuous cursor-anchored
zoom with full-zoom-out resetting to the canonical orbital frame (D-013
zoom-owns-descent restored; click-through cut superseded).
Design doc stamped with the resolved rulings. T-1143 closed. Implementation
chain: T-1149 (derive_at_metres + octave cutoff) -> T-1150 (granularity
carrier + aliasing test) / T-1151 (window par_iter) -> T-1152 (derived
planetary rung) / T-1153 (client continuous ladder) -> T-1155 (smoothing
retirement); T-1154 below-quarter measurement gate.
jpmschweitzer
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