# Model selector (Notchset): prompt.md (v2.0.0) - id: `model-selector` · version 2.0.0 · component · free - category: AI interfaces - build: one set of files for every shadcn style - install: `npx shadcn@latest add https://notchset.dev/r/model-selector.json` - npm dependencies: @base-ui/react@^1, lucide-react@^1 - registry dependencies: utils, https://notchset.dev/r/notchset-foundation.json, @notchset/button, @notchset/menu - docs: https://notchset.dev/components/model-selector - The install command carries everything this item needs (files, CSS, tokens, npm and registry dependencies). Prefer it to copying source by hand. Up to four choices named by purpose, each with a line on when to pick it and the model's name; no hidden Auto. One that can't answer now stays listed with why. An assistant that fixes its model shows it as set, by whom. The host binds the shortcut that opens it.. ## Build it - Stack: React 18.3 or 19, TypeScript, Tailwind CSS v4 utility classes on the foundation's roles, a components.json (imports use its aliases). - Packages: `@base-ui/react@^1`, `lucide-react@^1`. - Files: `components/ui/notchset/model-selector.tsx`; shared code: `lib/notchset/popup.ts`. - Registry dependencies, installed with it automatically: shadcn `utils` (cn), `notchset-foundation`, `button`, `menu`. - Builds: one set of files, the same for every shadcn style. - Exports to keep: `ModelSelector`, and every exported type. - CSS: the install adds the notchset foundation (its roles, keyframes and motion switch, reading your shadcn tokens for colour) to your global stylesheet once. Nothing to import by hand. - Re-running `add` (or `--overwrite`) re-applies those rules: put overrides in your own CSS, never in the installed rules. - Colours: every part reads the foundation's roles (`--ns-canvas`, `--ns-ink`, `--ns-line`, `--ns-signal` …), which read your shadcn tokens (`--background`, `--foreground`, `--border`, `--destructive` …), plus the optional `--success` and `--warning`. Retheme on `:root` or any container; never add Tailwind colour classes inside the component. - This item reads `--ns-control-sm`, `--ns-ease`, `--ns-ease-panel`, `--ns-hover`, `--ns-ink`, `--ns-ink-2`, `--ns-ink-3`, `--ns-line`, `--ns-menu-row`, `--ns-radius-lg`, `--ns-radius-xl`, `--ns-raised`, `--ns-shadow-float`, `--ns-sheet-bottom`, `--ns-text-body`, `--ns-text-meta`, `--ns-text-small`, `--ns-time-menu`, `--ns-time-panel`, `--ns-weight-medium`. - Retune it (on any ancestor) with the foundation's roles and hooks: `--ns-bad`, `--ns-bad-ink`, `--ns-band`, `--ns-band-edge`, `--ns-band-grade`, `--ns-band-optimal`, `--ns-beat`, `--ns-bezel`, `--ns-canvas`, `--ns-cat-1`, `--ns-cat-2`, `--ns-cat-3`, `--ns-cat-4`, `--ns-cat-5`, `--ns-cat-6`, `--ns-check`, `--ns-chip`, `--ns-control`, `--ns-control-pad`, `--ns-control-sm`, `--ns-deep`, `--ns-deep-ink`, `--ns-deep-ink-2`, `--ns-deep-line`, `--ns-dialog`, `--ns-dialog-lg`, `--ns-dialog-sm`, `--ns-ease`, `--ns-ease-in`, `--ns-ease-panel`, `--ns-ease-pop`, `--ns-field`, `--ns-flood-arc`, `--ns-flood-aurora`, `--ns-flood-behind-1`, `--ns-flood-behind-2`, `--ns-flood-bloom`, `--ns-flood-deep`, `--ns-flood-dial-bloom`, `--ns-flood-glass`, `--ns-flood-grain`, `--ns-flood-image`, `--ns-flood-ink`, `--ns-flood-ink-low`, `--ns-flood-light`, `--ns-flood-mid`, `--ns-flood-pale`, `--ns-flood-pane`, `--ns-flood-pane-edge`, `--ns-flood-pill-ink`, `--ns-flood-ribbon`, `--ns-flood-ribbon-core`, `--ns-flood-shadow`, `--ns-flood-sheen`, `--ns-flood-wash`, `--ns-font-body`, `--ns-font-display`, `--ns-font-mono`, `--ns-font-script`, `--ns-glass`, `--ns-glass-blur`, `--ns-glass-shadow`, `--ns-glow`, `--ns-grain`, `--ns-gutter`, `--ns-header`, `--ns-heat`, `--ns-hover`, `--ns-ink`, `--ns-ink-2`, `--ns-ink-3`, `--ns-ink-4`, `--ns-leading`, `--ns-lift`, `--ns-light-1`, `--ns-light-2`, `--ns-light-3`, `--ns-light-spread`, `--ns-light-strength`, `--ns-line`, `--ns-line-soft`, `--ns-lit-edge`, `--ns-menu-dy`, `--ns-menu-row`, `--ns-mesh`, `--ns-mesh-frost`, `--ns-ok`, `--ns-ok-ink`, `--ns-orb-body`, `--ns-orb-cool`, `--ns-orb-core`, `--ns-orb-dawn`, `--ns-orb-deep`, `--ns-orb-edge`, `--ns-orb-grain`, `--ns-orb-ground`, `--ns-orb-halo`, `--ns-orb-inner`, `--ns-orb-key`, `--ns-orb-lift`, `--ns-orb-limb`, `--ns-orb-limb-from`, `--ns-orb-rim`, `--ns-orb-skin-hi`, `--ns-orb-skin-lo`, `--ns-orb-skin-mid`, `--ns-orb-warm`, `--ns-panel`, `--ns-panel-w`, `--ns-prism-edge`, `--ns-prism-glint`, `--ns-prism-sheen`, `--ns-prism-tint`, `--ns-pulse`, `--ns-radius`, `--ns-radius-card`, `--ns-radius-full`, `--ns-radius-lg`, `--ns-radius-sm`, `--ns-radius-xl`, `--ns-raised`, `--ns-range`, `--ns-row`, `--ns-row-compact`, `--ns-segment`, `--ns-selected`, `--ns-series`, `--ns-series-core`, `--ns-series-lilac`, `--ns-series-tint`, `--ns-shadow-dialog`, `--ns-shadow-float`, `--ns-shadow-panel`, `--ns-sheet`, `--ns-sheet-bottom`, `--ns-side`, `--ns-signal`, `--ns-sleep-awake`, `--ns-sleep-deep`, `--ns-sleep-light`, `--ns-sleep-rem`, `--ns-space-1`, `--ns-space-2`, `--ns-space-3`, `--ns-space-4`, `--ns-space-5`, `--ns-space-6`, `--ns-space-8`, `--ns-space-section`, `--ns-stack-on`, `--ns-standing-critical`, `--ns-standing-in`, `--ns-standing-out`, `--ns-state-doing`, `--ns-state-done`, `--ns-state-review`, `--ns-state-todo`, `--ns-switch-h`, `--ns-switch-w`, `--ns-text-body`, `--ns-text-control`, `--ns-text-display`, `--ns-text-figure`, `--ns-text-headline`, `--ns-text-hero`, `--ns-text-lede`, `--ns-text-meta`, `--ns-text-page`, `--ns-text-record`, `--ns-text-small`, `--ns-text-strong`, `--ns-text-sub`, `--ns-text-title`, `--ns-tile-shadow`, `--ns-time-born`, `--ns-time-color`, `--ns-time-dialog`, `--ns-time-menu`, `--ns-time-page`, `--ns-time-panel`, `--ns-time-toast`, `--ns-tint`, `--ns-tint-ink`, `--ns-toast-bottom`, `--ns-toast-left`, `--ns-touch`, `--ns-tracking-display`, `--ns-tracking-headline`, `--ns-warn`, `--ns-warn-ink`, `--ns-wash-clay`, `--ns-wash-dusk`, `--ns-wash-graphite`, `--ns-wash-ink`, `--ns-wash-sage`, `--ns-wash-sand`, `--ns-weight-light`, `--ns-weight-medium`, `--ns-weight-regular`, `--ns-weight-strong`, `--ns-well`. - Never add Tailwind colour classes inside the component. ```tsx import { ModelSelector, type ModelChoice } from "@/components/ui/notchset/model-selector"; ``` ## Parts - A single export that takes props. ## Match the original - Read `components/ui/notchset/model-selector.tsx` as the reference implementation before changing or recreating anything, and match it: sizes, colours per theme, motion timings, copy and behaviour. - If you deviate (a prop you can't honour, a style you changed, a dependency you swapped), say so in your reply, part by part. - Keep the accessibility contract, the keyboard map and the motion levels listed below. ## Use it when ### Not when ## Built from - button (`button`), installed with it: reuse it, don't rebuild it - menu (`menu`), installed with it: reuse it, don't rebuild it - Popup placement (shared helper, ships with it) ## Mistakes - Recreating the component instead of installing it ## Usage ```tsx "use client"; import * as React from "react"; import { ModelSelector, type ModelChoice } from "@/components/ui/notchset/model-selector"; const CHOICES: ModelChoice[] = [ { id: "fast", purpose: "Fast", note: "Quick answers and short drafts", name: "Claude Haiku 5.5" }, { id: "balanced", purpose: "Balanced", note: "Most questions; thinks longer when it helps", name: "Claude Opus 5.5" }, { id: "deep", purpose: "Deep thinking", note: "Hard problems, plans and analysis", name: "Claude Opus 5.5", unavailable: "Busy right now: try again in a few minutes" }, ]; export default function ModelSelectorDemo() { const [value, setValue] = React.useState("balanced"); const [open, setOpen] = React.useState(false); /* the host binds the shortcut: ⌘⇧M (Ctrl+Shift+M) opens the choices */ React.useEffect(() => { const key = (e: KeyboardEvent) => { if ((e.metaKey || e.ctrlKey) && e.shiftKey && e.key.toLowerCase() === "m" && !e.isComposing) { e.preventDefault(); setOpen(true); } }; addEventListener("keydown", key); return () => removeEventListener("keydown", key); }, []); return (
{}} lockedBy="Support assistant" />
); } ``` ## Props | Prop | Type | Default | What it does | |---|---|---|---| | `choices` | `ModelChoice[]` | | Required. | | `value` | `string` | | Required. | | `onValueChange` | `(id: string) => void` | | Required. | | `lockedBy` | `string` | | who fixed the model ("Support assistant"): no menu, the choice is said as set | | `open` | `boolean` | | | | `onOpenChange` | `(open: boolean) => void` | | | Full docs: https://notchset.dev/components/model-selector ## Customising - Colours: every part reads the foundation's roles (`--ns-canvas`, `--ns-ink`, `--ns-line`, `--ns-signal` …), which read your shadcn tokens (`--background`, `--foreground`, `--border`, `--destructive` …), plus the optional `--success` and `--warning`. Retheme on `:root` or any container; never add Tailwind colour classes inside the component. - Dark mode follows the `.dark` class or `data-theme="dark"` on an ancestor (the shadcn and next-themes conventions). - Update later: Commit or stash local changes first (or copy the files), so the update can be undone. Read https://notchset.dev/r/changelog.json for the new versions: a major version, an entry marked breaking or a merge says what to change. Then re-run the install with `--overwrite`, on a branch. It replaces the component's files, the shared helper files they import, and the item's CSS rules in the global stylesheet, so review the whole diff (components, shared files, CSS), re-apply your own edits, and run the app's typecheck, tests and build. ## Accessibility contract (preserve when editing) ## Install ```bash npx shadcn@latest add https://notchset.dev/r/model-selector.json ``` Or add the `@notchset` registry to components.json and run `npx shadcn@latest add @notchset/model-selector`. Every components.json style gets the same files. ## Continue the workflow - [Message](https://notchset.dev/components/message) - [Prompt input](https://notchset.dev/components/prompt-input) - [Receipt](https://notchset.dev/blocks/receipt) ## Source ### components/ui/notchset/model-selector.tsx ```tsx // Notchset model-selector 2.0.0 · https://notchset.dev/changelog "use client"; import { Menu as Base } from "@base-ui/react/menu"; import { Check, ChevronDown, Lock } from "lucide-react"; import { cn } from "@/lib/utils"; import { Button } from "@/components/ui/notchset/button"; import { Menu } from "@/components/ui/notchset/menu"; import { popupItem } from "@/lib/notchset/popup"; /* * Model selector: which model answers, named by what it's for. Up to four choices ("Fast", "Balanced", "Deep * thinking", "Long documents"), each with one line on when to pick it and the model's own name under it; no hidden * Auto. A choice that can't answer right now stays listed, disabled, with the reason ("Busy right now"). An assistant * that fixes its model shows it as set, with who set it, instead of a menu. Every reply then names what answered * (Message's model line), so a fallback is never silent. * * The host owns the choice and the shortcut that opens it (⌘⇧M in the template), through open and onOpenChange. */ type ModelChoice = { id: string; /** what it's for, the name a person reads: "Balanced" */ purpose: string; /** when to pick it: "Most questions; thinks longer when it helps" */ note: string; /** the model's own name: "Claude Sonnet 5.5" */ name: string; /** why it can't answer right now; shown, and the choice is disabled */ unavailable?: string | undefined; }; type ModelSelectorProps = { choices: ModelChoice[]; value: string; onValueChange: (id: string) => void; /** who fixed the model ("Support assistant"): no menu, the choice is said as set */ lockedBy?: string | undefined; open?: boolean | undefined; onOpenChange?: ((open: boolean) => void) | undefined; className?: string | undefined; }; function ModelSelector({ choices, value, onValueChange, lockedBy, open, onOpenChange, className }: ModelSelectorProps) { const current = choices.find((c) => c.id === value) ?? choices[0]; if (!current) return null; if (lockedBy) return ( {current.purpose} · set by {lockedBy} ); return ( {current.purpose} } > onValueChange(String(v))}> {choices.map((c) => ( {c.purpose} {c.name} {c.unavailable ?? c.note} ))} ); } export { ModelSelector, type ModelChoice, type ModelSelectorProps }; ``` ### lib/notchset/popup.ts ```tsx // Notchset model-selector 2.0.0 · https://notchset.dev/changelog /* * The one popup surface every list that opens from a control uses (select, combobox, recipient picker, and * menus in batch 3): the prototype's .menu. It drops just below its control, and on a phone it becomes a * bottom sheet with a grab handle and finger-sized rows. Kept as class strings so each primitive's own parts * wear the same look. */ /** On the Positioner: above everything but dialogs; on a phone, pinned to the bottom edge as a sheet (above a tab bar when the app sets --ns-sheet-bottom to its height). */ export const popupPositioner = "z-50 outline-hidden max-[600px]:!fixed max-[600px]:!inset-x-2 max-[600px]:!top-auto max-[600px]:!bottom-[calc(var(--ns-sheet-bottom)+env(safe-area-inset-bottom,0px))] max-[600px]:!left-2 max-[600px]:!w-auto max-[600px]:!transform-none"; /** On the Popup. */ export const popupSurface = "min-w-[max(var(--anchor-width,0px),180px)] max-h-[min(420px,70vh,var(--available-height,70vh))] overflow-auto overscroll-contain rounded-[var(--ns-radius-lg)] bg-[var(--ns-raised)] p-[5px] text-[length:var(--ns-text-body)] text-[var(--ns-ink)] shadow-[0_0_0_1px_var(--ns-line),var(--ns-shadow-float)] outline-hidden origin-[var(--transform-origin)] " + "[animation:ns-menu-in_var(--ns-time-menu)_var(--ns-ease)] data-ending-style:opacity-0 data-ending-style:[transition:opacity_110ms_ease] " + "max-[600px]:w-auto max-[600px]:min-w-0 max-[600px]:max-h-[70dvh] max-[600px]:rounded-[var(--ns-radius-xl)] max-[600px]:px-1.5 max-[600px]:pt-3.5 max-[600px]:pb-1.5 max-[600px]:[animation:ns-sheet-up_var(--ns-time-panel)_var(--ns-ease-panel)] " + "max-[600px]:before:absolute max-[600px]:before:top-[5px] max-[600px]:before:left-1/2 max-[600px]:before:h-1 max-[600px]:before:w-9 max-[600px]:before:-translate-x-1/2 max-[600px]:before:rounded-full max-[600px]:before:bg-[var(--ns-line)] max-[600px]:before:content-['']"; /** On each item. Highlight (pointer or arrow keys) is the hover wash; the chosen item carries a check. */ export const popupItem = "flex w-full min-h-[var(--ns-menu-row)] cursor-default items-center gap-[9px] rounded-[7px] px-[9px] text-left outline-hidden select-none data-highlighted:bg-[var(--ns-hover)] data-disabled:opacity-45 [&_svg:not([data-slot=company-mark])]:size-3.5 [&_svg]:shrink-0"; /** The quiet line a list shows when nothing matches. */ export const popupEmpty = "px-[9px] py-2 text-[length:var(--ns-text-small)] text-[var(--ns-ink-3)] empty:hidden"; ``` The foundation (the tokens listed above, keyframes and motion levels) installs once with the first component; its CSS is public at https://notchset.dev/r/notchset-foundation.json.