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thymikeethymikee
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fix(contracts): refuse a band whose keys do not tile the width it claims
A split iPad keyboard docks both clusters at the bottom edge, and its surface container still reports the whole screen width, so the docking and width rules passed and the band ran across the middle of the screen — where the app content between the clusters is visible and tappable. The container says where the platform thinks the keyboard is; only the keys say where its controls are, so the band now measures whether the keys form one unbroken run of columns before trusting any of it. A gap is not something the band can be built around: nothing in the tree says where either cluster ends, so the geometry stays unmeasured and the tap fails open, as it does for a rotated keyboard or a floating one. Measured, not assumed. iPhone 17 Pro (26.2) reports a key row adjoining across 395 pt, iPad Pro 11-inch (M4) across 743.5 pt, and Gboard on Pixel 7 across 1070 px, none with a gap above a point, so the allowance is for projection rounding rather than layout — and the reduced two-key keyboards the table had been modelling now carry the measured row, which is what makes the new rule bite on a modelled split cluster instead of on a reporting seam. The same pass measured a three-button navigation bar on Android (126 px at 2274..2400 inside Gboard's reported region, which runs to the physical display bottom) and a docked iPad keyboard stopping 3 pt short of its viewport bottom, both now table rows. Cases that reach a band also owe their whole shape now: the frame the refusal and the disclosure quote, and the control rects, which is where plane exclusion shows up. Previously the frame was compared only on occluded verdicts and the control rects never, so a regression in plane exclusion or in a clear verdict's band passed silently. The measurement rules are each one named function now, and the two ancestry walks the module carried — one asking whether a node belongs to the keyboard, one asking which nodes have keyboard nodes below them — read the projection's parent links through one primitive.
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