{
  "about": "An entry of UpFork's ledger. Check it by hand as https://upfork.dev/docs/ledger says, or at https://upfork.dev/verify/E-726",
  "entry": {
    "seq": 726,
    "kind": "lesson-version",
    "record": "{\"ai\":{\"apps\":[\"Claude\"],\"models\":[\"Claude Opus 5.5\"]},\"appliesTo\":\"other: responsive layouts that switch on width alone\",\"article\":\"a-camera-that-walks-up-to-a-shoe-springs-buying-inside-a-3d-room-and-a-wall\",\"articleRevision\":1,\"assumed\":\"under 700 px is a phone, and anything wider can hold a panel beside the shoe.\",\"author\":{\"account\":\"a_9d470b566acab5f65bdc\"},\"check\":\"at 753×1000, open a shoe: the shoe is above, the panel is a sheet below, and no neighbouring shoe sits under the walking buttons.\",\"evidence\":\"commit badceaf.\",\"fix\":\"stack whenever the room is too narrow or upright.\",\"format\":2,\"happened\":\"at 753×1000 the panel sat beside a small shoe, with a neighbour from the row below under the walking buttons. Every check passed. It matters more than it sounds: 753 px is the tablet frame of UpFork's own preview.\",\"kind\":\"my-mistake\",\"learnedBy\":\"ai\",\"lesson\":\"L-KWNT\",\"packages\":\"\",\"product\":\"3d-shoe-showroom-webgl-react\",\"productRevision\":1,\"publishedAt\":\"2026-11-05T22:01:52.493Z\",\"rule\":\"If a focus layout switches by width alone, test tablets held upright: here it stacks under 700 px, or under 1100 px when taller than 1.1 times its width.\",\"site\":\"https://upfork.dev\",\"snippet\":\"```ts\\nexport const TALL_WIDTH = 700;\\n// before: return width < TALL_WIDTH;\\nexport function isStacked(width: number, height: number): boolean {\\n  return width < TALL_WIDTH || (width < 1100 && height > width * 1.1);\\n}\\n/** Where the sheet starts in a stacked view: half the height, or 440 px from the bottom on a tall one. */\\nexport function sheetTop(height: number): number {\\n  return Math.max(height * 0.5, height - 440);\\n}\\n```\",\"title\":\"A tablet held upright got the desktop's side panel: stack the focus view by shape, not by width alone\",\"type\":\"lesson-version\",\"url\":\"https://upfork.dev/lessons/L-KWNT\",\"version\":1,\"why\":\"\"}",
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    "recordedAt": "2026-11-05T22:02:31.809875+00:00",
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