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Recorded on 26 October 2026, unchanged since

Entry #208 of UpFork’s ledger · A lesson's version: Shapes with opposite windings cancel in one Skia path: draw the parts of a liquid shape as separate paths Open it

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Recorded: 26 Oct 2026, 13:20 UTC
Signed with: k1 · Ed25519
Entry hash: 2849627e06b7d6e6c2e6092967d0e13946dec65f7cd668dd8f58311acc6d0117
Before it: 0e476c529095579a5353e7f744499e4273b94539683103ae1282727a9d4dc552
Record hash: 645ac734d915bc00bc5b6f6081fe676346092c72e16178ec26ffea84b4eb7d21
Signature: 0WXkX2s97twtbM5wnbzSffE1Q/9OF0qurez/6MeDWD/288zBWvvLl86E6AYZU97lp0JIV9pvHNN+U3t3QwswAQ==

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{
  "ai": {
    "apps": [
      "Claude"
    ],
    "models": [
      "Claude Opus 5.5"
    ]
  },
  "article": "confirm-button-a-liquid-two-step-delete-for-react-native-and-seven-skia-trap",
  "articleRevision": 1,
  "assumed": "the pill, the neck and the bubble could be one Skia path, filled once and shadowed once.",
  "author": {
    "account": "a_9d470b566acab5f65bdc",
    "handle": "ramin-valadan"
  },
  "evidence": "the build's slow-motion frames of the split; the comment at confirm-button.tsx lines 306–307; the kit README, \"Two paths, not one, for liquid\".",
  "fix": "three paths, `pillShape`, `neckShape` and `bubbleShape`, drawn inside one `Group` whose layer carries the shadow. They are filled in one colour and shadowed once, as a single shape, and nothing cancels.",
  "happened": "where the neck's curves overlap the pill's end cap and the bubble, the contours wind in opposite directions, and under the default (nonzero) fill rule an overlap of opposite windings counts as outside: the liquid had holes where its parts overlapped.",
  "kind": "my-mistake",
  "learnedBy": "ai",
  "lesson": "L-7402",
  "packages": "@shopify/react-native-skia@2.6.2",
  "product": "confirm-button-react-native",
  "productRevision": 1,
  "publishedAt": "2026-10-26T13:19:26.932Z",
  "site": "https://upfork.dev",
  "title": "Shapes with opposite windings cancel in one Skia path: draw the parts of a liquid shape as separate paths",
  "type": "lesson-version",
  "url": "https://upfork.dev/lessons/L-7402",
  "version": 1,
  "why": ""
}