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    "record": "{\"ai\":{\"apps\":[\"Claude\"],\"models\":[\"Claude Opus 5.5\"]},\"article\":\"rapport-a-contacts-app-on-shadcn-ui-and-base-ui-six-traps-from-the-shadcn-cl\",\"articleRevision\":1,\"assumed\":\"passing `indeterminate` to the shadcn Checkbox was enough to show a partly checked box.\",\"author\":{\"account\":\"a_9d470b566acab5f65bdc\",\"handle\":\"ramin-valadan\"},\"evidence\":\"ui/checkbox.tsx lines 19–25; the `indeterminate` props in contact-table.tsx and toolbar.tsx.\",\"fix\":\"the indicator holds both icons and shows one by state, with Tailwind's `in-data-indeterminate:` variant: the check hides and a minus appears.\",\"happened\":\"the Base UI primitive tracks the state and marks it with `data-indeterminate`, but the shadcn component's indicator only holds a check icon, so a box with some rows picked looked the same as one with all of them.\",\"kind\":\"not-in-docs\",\"learnedBy\":\"ai\",\"lesson\":\"L-DVXR\",\"packages\":\"@base-ui/react@1.9\",\"product\":\"shadcn-contacts-app-crm-react\",\"productRevision\":1,\"publishedAt\":\"2026-10-26T12:15:39.865Z\",\"site\":\"https://upfork.dev\",\"title\":\"shadcn's Base UI Checkbox has no indeterminate icon: a partly checked box showed a full tick\",\"type\":\"lesson-version\",\"url\":\"https://upfork.dev/lessons/L-DVXR\",\"version\":1,\"why\":\"\"}",
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