{
  "$schema": "https://ui.shadcn.com/schema/registry-item.json",
  "name": "model-selector",
  "title": "Model selector",
  "description": "Model selector is a production-ready ai component from BJORK UI, packaged for shadcn registries.",
  "dependencies": [
    "clsx",
    "framer-motion",
    "lucide-react",
    "next-themes",
    "tailwind-merge"
  ],
  "files": [
    {
      "path": "components/bjork-ui/ai/model-selector.tsx",
      "content": "\"use client\";\n\nimport { useEffect, useId, useLayoutEffect, useMemo, useRef, useState, type KeyboardEvent, type RefObject } from \"react\";\nimport { Lock, Search } from \"lucide-react\";\nimport { LiveRegion } from \"@/components/bjork-ui/_core/a11y\";\nimport {\n  FOCUS_RING,\n  PRESS,\n  formatTokens,\n  useAiTone,\n  useControllable,\n  useReduceMotion,\n  type BjorkTone,\n} from \"@/components/bjork-ui/ai/_shared\";\nimport { StrokeMorphIcon } from \"@/components/bjork-ui/utilities/stroke-morph-icon\";\nimport { cn } from \"@/lib/utils\";\n\nexport type ModelCapability = \"vision\" | \"tools\" | \"reasoning\" | \"long-context\";\nexport type ModelSpeed = \"fast\" | \"balanced\" | \"deliberate\";\n\nexport interface AiModel {\n  id: string;\n  name: string;\n  /** Groups the list. Its initials become the monogram tile. */\n  provider: string;\n  description?: string;\n  capabilities?: ModelCapability[];\n  /** Context window in tokens. Shown as \"200k\". */\n  contextWindow?: number;\n  /** US dollars per million tokens. */\n  price?: { input: number; output: number };\n  speed?: ModelSpeed;\n  disabled?: boolean;\n  /** Why a disabled model is unavailable, such as \"Requires Pro\". */\n  disabledReason?: string;\n}\n\nexport interface ModelSelectorProps {\n  /** Defaults to SAMPLE_MODELS. */\n  models?: AiModel[];\n  /** Controlled selected model id. */\n  value?: string;\n  defaultValue?: string;\n  onValueChange?: (id: string, model: AiModel) => void;\n  /** Controlled open state of the menu. */\n  open?: boolean;\n  defaultOpen?: boolean;\n  onOpenChange?: (open: boolean) => void;\n  /** Preferred side for the menu. It flips when the other side has more room. Default \"bottom\". */\n  side?: \"top\" | \"bottom\";\n  /** Edge of the trigger the menu lines up with before it is kept inside the viewport. Default \"start\". */\n  align?: \"start\" | \"end\";\n  /**\n   * Element the menu lines up under instead of the trigger, such as the composer card the picker sits in. The menu\n   * takes its width and left edge from it, and opens below its bottom edge. Omit it to anchor to the trigger.\n   */\n  anchorRef?: RefObject<HTMLElement | null>;\n  /** Accessible name of the trigger and list. Default \"Model\". */\n  label?: string;\n  disabled?: boolean;\n  tone?: BjorkTone;\n  className?: string;\n}\n\nexport const SAMPLE_MODELS: AiModel[] = [\n  {\n    id: \"halcyon-3-pro\",\n    name: \"Halcyon 3 Pro\",\n    provider: \"Lumen Labs\",\n    description: \"Careful, thorough work across long documents and code.\",\n    capabilities: [\"vision\", \"tools\", \"reasoning\", \"long-context\"],\n    contextWindow: 200_000,\n    price: { input: 3, output: 15 },\n    speed: \"balanced\",\n  },\n  {\n    id: \"halcyon-3-flash\",\n    name: \"Halcyon 3 Flash\",\n    provider: \"Lumen Labs\",\n    description: \"Quick answers and high-volume drafting.\",\n    capabilities: [\"vision\", \"tools\"],\n    contextWindow: 200_000,\n    price: { input: 0.25, output: 1.25 },\n    speed: \"fast\",\n  },\n  {\n    id: \"halcyon-3-ultra\",\n    name: \"Halcyon 3 Ultra\",\n    provider: \"Lumen Labs\",\n    description: \"The largest Halcyon, for research-grade problems.\",\n    capabilities: [\"vision\", \"tools\", \"reasoning\", \"long-context\"],\n    contextWindow: 500_000,\n    price: { input: 15, output: 75 },\n    speed: \"deliberate\",\n    disabled: true,\n    disabledReason: \"Requires Pro\",\n  },\n  {\n    id: \"kestrel-mini\",\n    name: \"Kestrel Mini\",\n    provider: \"Aviary\",\n    description: \"Small and cheap. Good for routing and extraction.\",\n    capabilities: [\"tools\"],\n    contextWindow: 128_000,\n    price: { input: 0.15, output: 0.6 },\n    speed: \"fast\",\n  },\n  {\n    id: \"kestrel-large\",\n    name: \"Kestrel Large\",\n    provider: \"Aviary\",\n    description: \"Balanced general model with strong image reading.\",\n    capabilities: [\"vision\", \"tools\"],\n    contextWindow: 128_000,\n    price: { input: 2.5, output: 10 },\n    speed: \"balanced\",\n  },\n  {\n    id: \"corvid-reasoner\",\n    name: \"Corvid Reasoner\",\n    provider: \"Corvid Research\",\n    description: \"Thinks before it answers. Best for math and planning.\",\n    capabilities: [\"reasoning\", \"tools\", \"long-context\"],\n    contextWindow: 256_000,\n    price: { input: 4, output: 16 },\n    speed: \"deliberate\",\n  },\n  {\n    id: \"corvid-reasoner-max\",\n    name: \"Corvid Reasoner Max\",\n    provider: \"Corvid Research\",\n    description: \"Extended thinking budget for the hardest problems.\",\n    capabilities: [\"reasoning\", \"tools\", \"long-context\"],\n    contextWindow: 256_000,\n    price: { input: 12, output: 48 },\n    speed: \"deliberate\",\n    disabled: true,\n    disabledReason: \"Waitlist only\",\n  },\n];\n\nconst CAPABILITY_LABEL: Record<ModelCapability, string> = {\n  vision: \"Vision\",\n  tools: \"Tools\",\n  reasoning: \"Reasoning\",\n  \"long-context\": \"Long ctx\",\n};\nconst SPEED_LEVEL: Record<ModelSpeed, number> = { fast: 3, balanced: 2, deliberate: 1 };\n// Room kept between the menu and the viewport edge.\nconst EDGE = 12;\n// Room between the trigger and the menu. Matches the house popover spacing (8px).\nconst GAP = 8;\n\nfunction monogram(provider: string): string {\n  const words = provider.split(/\\s+/).filter(Boolean);\n  return words\n    .slice(0, 2)\n    .map((w) => w[0]?.toUpperCase() ?? \"\")\n    .join(\"\");\n}\n\nfunction money(n: number): string {\n  return n < 1 || n % 1 !== 0 ? `$${n.toFixed(2)}` : `$${n}`;\n}\n\nfunction matches(model: AiModel, q: string): boolean {\n  if (!q) return true;\n  const hay = [model.name, model.provider, model.description ?? \"\", ...(model.capabilities ?? []).map((c) => CAPABILITY_LABEL[c])]\n    .join(\" \")\n    .toLowerCase();\n  return q\n    .toLowerCase()\n    .split(/\\s+/)\n    .filter(Boolean)\n    .every((word) => hay.includes(word));\n}\n\n/**\n * A model picker: a compact trigger that opens a searchable list of models grouped by provider. The list is a\n * combobox, so focus stays in the search field while the arrow keys move the highlighted option.\n */\nexport function ModelSelector({\n  models = SAMPLE_MODELS,\n  value,\n  defaultValue,\n  onValueChange,\n  open,\n  defaultOpen = false,\n  onOpenChange,\n  side = \"bottom\",\n  align = \"start\",\n  anchorRef,\n  label = \"Model\",\n  disabled = false,\n  tone: toneProp,\n  className,\n}: ModelSelectorProps) {\n  const { style } = useAiTone(toneProp);\n  const reduce = useReduceMotion();\n  const firstEnabled = models.find((m) => !m.disabled)?.id ?? \"\";\n  const [selectedId, setSelectedId] = useControllable<string>(value, defaultValue ?? firstEnabled, (id) => {\n    const model = models.find((m) => m.id === id);\n    if (model) onValueChange?.(id, model);\n  });\n  const [isOpen, setOpen] = useControllable(open, defaultOpen, onOpenChange);\n  const [query, setQuery] = useState(\"\");\n  const [activeId, setActiveId] = useState<string | null>(selectedId);\n  const [announce, setAnnounce] = useState(\"\");\n\n  const wrapRef = useRef<HTMLDivElement>(null);\n  const triggerRef = useRef<HTMLButtonElement>(null);\n  const panelRef = useRef<HTMLDivElement>(null);\n  const listRef = useRef<HTMLDivElement>(null);\n  const inputRef = useRef<HTMLInputElement>(null);\n  const focusOnOpen = useRef(false);\n  const baseId = useId();\n  const listId = `${baseId}-list`;\n  const optionId = (id: string) => `${baseId}-opt-${id}`;\n\n  const selected = models.find((m) => m.id === selectedId);\n  const filtered = useMemo(() => models.filter((m) => matches(m, query.trim())), [models, query]);\n  const groups = useMemo(\n    () =>\n      filtered.reduce<{ provider: string; models: AiModel[] }[]>((acc, m) => {\n        const g = acc.find((x) => x.provider === m.provider);\n        if (g) g.models.push(m);\n        else acc.push({ provider: m.provider, models: [m] });\n        return acc;\n      }, []),\n    [filtered],\n  );\n  // Visual order (grouped) drives the arrow keys.\n  const ordered = useMemo(() => groups.flatMap((g) => g.models), [groups]);\n  const active = ordered.find((m) => m.id === activeId) ?? ordered[0];\n\n  const openMenu = () => {\n    if (disabled) return;\n    focusOnOpen.current = true;\n    setQuery(\"\");\n    setActiveId(selectedId);\n    setOpen(true);\n  };\n\n  const close = (refocus: boolean) => {\n    setOpen(false);\n    if (refocus) triggerRef.current?.focus();\n  };\n\n  const choose = (model: AiModel | undefined) => {\n    if (!model || model.disabled) return;\n    setSelectedId(model.id);\n    setAnnounce(`${model.name} selected`);\n    close(true);\n  };\n\n  // Placement: flip above or below by available room, then slide sideways so the menu stays in the viewport.\n  // Written straight to the DOM, so measuring never costs a render.\n  useLayoutEffect(() => {\n    if (!isOpen) return;\n    const place = () => {\n      const trigger = triggerRef.current;\n      const panel = panelRef.current;\n      const list = listRef.current;\n      const wrap = wrapRef.current;\n      if (!trigger || !panel || !list || !wrap) return;\n      const r = trigger.getBoundingClientRect();\n      // The edge the menu lines up with: the composer when one is given, otherwise the trigger.\n      const a = anchorRef?.current?.getBoundingClientRect() ?? r;\n      const w = wrap.getBoundingClientRect();\n      // Screen pixels to the wrapper's own CSS pixels, so offsets stay right inside a scaled preview.\n      const k = wrap.offsetWidth > 0 ? w.width / wrap.offsetWidth : 1;\n      const local = (px: number) => px / k;\n      const vw = window.innerWidth;\n      const vh = window.innerHeight;\n      const below = vh - a.bottom - GAP - EDGE;\n      const above = a.top - GAP - EDGE;\n      const chrome = panel.offsetHeight - list.offsetHeight;\n      const want = Math.min(list.scrollHeight, 340);\n      const fitsPreferred = (side === \"bottom\" ? below : above) >= want + chrome;\n      const placeBelow = side === \"bottom\" ? fitsPreferred || below >= above : !(fitsPreferred || above >= below);\n      const room = Math.max(120, (placeBelow ? below : above) - chrome);\n      list.style.maxHeight = `${Math.min(340, local(room))}px`;\n      panel.dataset.side = placeBelow ? \"bottom\" : \"top\";\n      // Offsets are measured from the wrapper, which is the menu's containing block.\n      panel.style.top = placeBelow ? `${local(a.bottom + GAP - w.top)}px` : \"auto\";\n      panel.style.bottom = placeBelow ? \"auto\" : `${local(w.bottom - a.top + GAP)}px`;\n      if (anchorRef?.current) {\n        panel.style.width = `${local(Math.min(a.width, vw - EDGE * 2))}px`;\n      } else {\n        panel.style.width = \"\";\n      }\n      const width = panel.offsetWidth;\n      const wantLeft = anchorRef?.current ? a.left : align === \"start\" ? r.left : r.right - width * k;\n      const left = Math.min(Math.max(EDGE, wantLeft), Math.max(EDGE, vw - EDGE - width * k));\n      panel.style.left = `${local(left - w.left)}px`;\n    };\n    place();\n    // On mount the composer ref is attached after this effect runs, so place once more on the next frame.\n    const frame = requestAnimationFrame(place);\n    window.addEventListener(\"resize\", place);\n    window.addEventListener(\"scroll\", place, true);\n    return () => {\n      cancelAnimationFrame(frame);\n      window.removeEventListener(\"resize\", place);\n      window.removeEventListener(\"scroll\", place, true);\n    };\n  }, [isOpen, side, align, groups, anchorRef]);\n\n  // Focus moves into the search field only when the user opened the menu, never on mount.\n  useEffect(() => {\n    if (!isOpen || !focusOnOpen.current) return;\n    focusOnOpen.current = false;\n    inputRef.current?.focus();\n  }, [isOpen]);\n\n  // Keep the highlighted option in view inside the list without scrolling the page.\n  const activeDomId = active ? optionId(active.id) : null;\n  useEffect(() => {\n    const list = listRef.current;\n    if (!isOpen || !list || !activeDomId) return;\n    const el = document.getElementById(activeDomId);\n    if (!el) return;\n    const header = 28;\n    const top = el.offsetTop - header;\n    const bottom = el.offsetTop + el.offsetHeight + 6;\n    if (top < list.scrollTop) list.scrollTop = top;\n    else if (bottom > list.scrollTop + list.clientHeight) list.scrollTop = bottom - list.clientHeight;\n  }, [isOpen, activeDomId]);\n\n  useEffect(() => {\n    if (!isOpen) return;\n    const onDown = (e: PointerEvent) => {\n      if (wrapRef.current && !wrapRef.current.contains(e.target as Node)) setOpen(false);\n    };\n    // Escape from anywhere, for a menu opened without focus inside it (defaultOpen or controlled).\n    const onKey = (e: globalThis.KeyboardEvent) => {\n      if (e.key !== \"Escape\" || e.defaultPrevented) return;\n      setOpen(false);\n      if (wrapRef.current?.contains(document.activeElement)) triggerRef.current?.focus();\n    };\n    document.addEventListener(\"pointerdown\", onDown);\n    document.addEventListener(\"keydown\", onKey);\n    return () => {\n      document.removeEventListener(\"pointerdown\", onDown);\n      document.removeEventListener(\"keydown\", onKey);\n    };\n  }, [isOpen, setOpen]);\n\n  const move = (delta: number) => {\n    if (ordered.length === 0) return;\n    const i = active ? ordered.indexOf(active) : -1;\n    const next = ordered[(i + delta + ordered.length) % ordered.length];\n    setActiveId(next.id);\n  };\n\n  const onInputKey = (e: KeyboardEvent<HTMLInputElement>) => {\n    if (e.nativeEvent.isComposing) return;\n    switch (e.key) {\n      case \"ArrowDown\":\n        e.preventDefault();\n        move(1);\n        break;\n      case \"ArrowUp\":\n        e.preventDefault();\n        move(-1);\n        break;\n      case \"Home\":\n        e.preventDefault();\n        if (ordered[0]) setActiveId(ordered[0].id);\n        break;\n      case \"End\":\n        e.preventDefault();\n        if (ordered.length) setActiveId(ordered[ordered.length - 1].id);\n        break;\n      case \"Enter\":\n        e.preventDefault();\n        choose(active);\n        break;\n      case \"Escape\":\n        e.preventDefault();\n        close(true);\n        break;\n      case \"Tab\":\n        close(false);\n        break;\n    }\n  };\n\n  return (\n    <div\n      ref={wrapRef}\n      className={cn(\"relative inline-flex max-w-full font-bjork-alpha text-[color:var(--bjork-text)]\", className)}\n      style={style}\n    >\n      <button\n        ref={triggerRef}\n        type=\"button\"\n        disabled={disabled}\n        aria-haspopup=\"listbox\"\n        aria-expanded={isOpen}\n        aria-controls={isOpen ? listId : undefined}\n        aria-label={`${label}: ${selected?.name ?? \"none\"}`}\n        onClick={() => (isOpen ? close(false) : openMenu())}\n        onKeyDown={(e) => {\n          if ((e.key === \"ArrowDown\" || e.key === \"ArrowUp\") && !isOpen) {\n            e.preventDefault();\n            openMenu();\n          }\n        }}\n        className={cn(\n          \"group flex h-8 min-w-0 max-w-full cursor-pointer items-center gap-2 rounded-[9px] pl-1.5 pr-2 text-left transition-colors duration-150 hover:bg-[color:var(--bjork-surface-active)] disabled:cursor-not-allowed disabled:opacity-45\",\n          isOpen && \"bg-[color:var(--bjork-surface-active)]\",\n          FOCUS_RING,\n          PRESS,\n        )}\n      >\n        <Monogram provider={selected?.provider ?? \"?\"} accent />\n        <span className=\"min-w-0 truncate text-[13px] font-medium leading-5\">{selected?.name ?? \"Choose a model\"}</span>\n        <span\n          aria-hidden=\"true\"\n          className={cn(\n            \"grid size-3 shrink-0 place-items-center transition-transform duration-[180ms] ease-out motion-reduce:transition-none\",\n            isOpen ? \"rotate-180\" : \"rotate-0\",\n          )}\n        >\n          <StrokeMorphIcon name=\"chevron-down\" size={12} strokeWidth={1.75} color=\"var(--bjork-text-muted)\" />\n        </span>\n      </button>\n\n      {isOpen && (\n        <div\n          ref={panelRef}\n          data-side={side}\n          data-anchor={anchorRef ? \"container\" : \"trigger\"}\n          className={cn(\n            \"absolute left-0 top-[calc(100%+8px)] z-40 flex w-[min(380px,calc(100vw-24px))] flex-col overflow-hidden rounded-[14px] border border-[color:var(--bjork-border)] bg-[color:var(--bjork-menu)] shadow-[var(--bjork-shadow-menu)] backdrop-blur-md\",\n            \"data-[side=bottom]:origin-top data-[side=top]:origin-bottom\",\n            !reduce && \"motion-safe:animate-[bjork-model-pop_180ms_cubic-bezier(0.23,1,0.32,1)]\",\n          )}\n        >\n          <style href=\"bjork-model-selector-pop\" precedence=\"default\">\n            {\"@keyframes bjork-model-pop{from{opacity:0;transform:scale(0.97)}to{opacity:1;transform:none}}\"}\n          </style>\n          <div className=\"flex h-11 shrink-0 items-center gap-2 border-b border-[color:var(--bjork-border)] px-3\">\n            <Search aria-hidden=\"true\" size={14} strokeWidth={1.75} className=\"shrink-0 text-[color:var(--bjork-text-faint)]\" />\n            <input\n              ref={inputRef}\n              role=\"combobox\"\n              aria-expanded=\"true\"\n              aria-controls={listId}\n              aria-autocomplete=\"list\"\n              aria-activedescendant={active ? optionId(active.id) : undefined}\n              aria-label={`Search ${label.toLowerCase()}s`}\n              value={query}\n              onChange={(e) => {\n                setQuery(e.target.value);\n                setActiveId(null);\n              }}\n              onKeyDown={onInputKey}\n              placeholder=\"Search models\"\n              spellCheck={false}\n              autoComplete=\"off\"\n              className=\"h-full min-w-0 flex-1 bg-transparent text-[13px] leading-5 text-[color:var(--bjork-text)] outline-none placeholder:text-[color:var(--bjork-text-soft)]\"\n            />\n            <span className=\"shrink-0 font-mono text-[11px] tabular-nums text-[color:var(--bjork-text-faint)]\">\n              {filtered.length}/{models.length}\n            </span>\n          </div>\n\n          <div\n            ref={listRef}\n            id={listId}\n            role=\"listbox\"\n            aria-label={label}\n            className=\"relative max-h-[340px] overflow-y-auto overscroll-contain p-1.5 [scrollbar-width:thin]\"\n          >\n            {groups.length === 0 && (\n              <div className=\"px-3 py-6 text-center text-[13px] text-[color:var(--bjork-text-muted)]\">\n                No models match “{query.trim()}”\n              </div>\n            )}\n            {groups.map((group) => {\n              const headId = `${baseId}-g-${monogram(group.provider)}-${group.provider.length}`;\n              return (\n                <div key={group.provider} role=\"group\" aria-labelledby={headId} className=\"pb-1 last:pb-0\">\n                  <div\n                    id={headId}\n                    className=\"sticky top-0 z-10 -mx-1.5 flex h-7 items-center gap-2 bg-[color:var(--bjork-menu)] px-3 font-mono text-[10px] uppercase tracking-[0.08em] text-[color:var(--bjork-text-faint)]\"\n                  >\n                    {group.provider}\n                  </div>\n                  {group.models.map((model) => (\n                    <ModelOption\n                      key={model.id}\n                      id={optionId(model.id)}\n                      model={model}\n                      active={active?.id === model.id}\n                      selected={selectedId === model.id}\n                      onHover={() => setActiveId(model.id)}\n                      onChoose={() => choose(model)}\n                    />\n                  ))}\n                </div>\n              );\n            })}\n          </div>\n\n          <div\n            aria-hidden=\"true\"\n            className=\"hidden h-8 shrink-0 items-center gap-3 border-t border-[color:var(--bjork-border)] whitespace-nowrap px-3 font-mono text-[11px] text-[color:var(--bjork-text-soft)] min-[420px]:flex\"\n          >\n            <span>↑↓ move</span>\n            <span>↵ select</span>\n            <span>esc close</span>\n            <span className=\"ml-auto min-w-0 truncate\">per 1M · in/out</span>\n          </div>\n        </div>\n      )}\n      <LiveRegion message={announce} />\n    </div>\n  );\n}\n\nfunction Monogram({ provider, accent = false, small = false }: { provider: string; accent?: boolean; small?: boolean }) {\n  return (\n    <span\n      aria-hidden=\"true\"\n      className={cn(\n        \"grid shrink-0 place-items-center rounded-[6px] border font-mono font-medium leading-none tracking-[-0.02em]\",\n        small ? \"size-[18px] text-[11px]\" : \"size-5 text-[11px]\",\n        accent\n          ? \"border-[color:var(--bjork-accent-muted)] bg-[color:var(--bjork-accent-soft)] text-[color:var(--bjork-accent-ink)]\"\n          : \"border-[color:var(--bjork-border)] bg-[color:var(--bjork-surface-active)] text-[color:var(--bjork-text-medium)]\",\n      )}\n    >\n      {monogram(provider)}\n    </span>\n  );\n}\n\nfunction SpeedBars({ speed }: { speed: ModelSpeed }) {\n  const level = SPEED_LEVEL[speed];\n  return (\n    <span className=\"inline-flex items-center gap-1.5\" title={`Speed: ${speed}`}>\n      <span aria-hidden=\"true\" className=\"inline-flex h-2.5 items-end gap-[2px]\">\n        {[1, 2, 3].map((n) => (\n          <span\n            key={n}\n            className=\"w-[3px] rounded-[1px]\"\n            style={{\n              height: `${4 + n * 2}px`,\n              background: n <= level ? \"var(--bjork-text-muted)\" : \"var(--bjork-hair)\",\n            }}\n          />\n        ))}\n      </span>\n      <span className=\"text-[color:var(--bjork-text-faint)]\">{speed}</span>\n    </span>\n  );\n}\n\ninterface ModelOptionProps {\n  id: string;\n  model: AiModel;\n  active: boolean;\n  selected: boolean;\n  onHover: () => void;\n  onChoose: () => void;\n}\n\nfunction ModelOption({ id, model, active, selected, onHover, onChoose }: ModelOptionProps) {\n  const caps = model.capabilities ?? [];\n  return (\n    <div\n      id={id}\n      role=\"option\"\n      aria-selected={selected}\n      aria-disabled={model.disabled || undefined}\n      data-active={active || undefined}\n      onPointerMove={onHover}\n      // Keep focus in the search field when an option is clicked.\n      onPointerDown={(e) => e.preventDefault()}\n      onClick={onChoose}\n      className={cn(\n        \"relative grid scroll-my-8 grid-cols-[16px_minmax(0,1fr)_auto] gap-x-2.5 rounded-[9px] px-2.5 py-2 transition-colors duration-100\",\n        model.disabled ? \"cursor-not-allowed\" : \"cursor-pointer\",\n        active && \"bg-[color:var(--bjork-surface-active)]\",\n      )}\n    >\n      <span aria-hidden=\"true\" className=\"grid h-5 place-items-center\">\n        {selected && <StrokeMorphIcon name=\"check\" size={14} strokeWidth={2} color=\"var(--bjork-accent-ink)\" />}\n      </span>\n\n      <span className={cn(\"min-w-0\", model.disabled && \"opacity-55\")}>\n        <span className=\"flex min-w-0 items-baseline gap-2\">\n          <span className=\"truncate text-[14px] font-medium leading-5\">{model.name}</span>\n          {model.disabled && model.disabledReason && (\n            <span className=\"inline-flex shrink-0 items-center gap-1 font-mono text-[10px] uppercase tracking-[0.08em] text-[color:var(--bjork-text-muted)]\">\n              <Lock aria-hidden=\"true\" size={10} strokeWidth={2} className=\"translate-y-[0.5px]\" />\n              {model.disabledReason}\n            </span>\n          )}\n        </span>\n        {model.description && (\n          <span className=\"block truncate text-[12px] leading-[18px] text-[color:var(--bjork-text-soft)]\">\n            {model.description}\n          </span>\n        )}\n        {caps.length > 0 && (\n          <span className=\"mt-1.5 flex flex-wrap gap-1\" aria-label={`Capabilities: ${caps.map((c) => CAPABILITY_LABEL[c]).join(\", \")}`}>\n            {caps.map((c) => (\n              <span\n                key={c}\n                aria-hidden=\"true\"\n                className=\"rounded-[4px] border border-[color:var(--bjork-border)] px-1 font-mono text-[10px] uppercase leading-[15px] tracking-[0.06em] text-[color:var(--bjork-text-muted)]\"\n              >\n                {CAPABILITY_LABEL[c]}\n              </span>\n            ))}\n          </span>\n        )}\n      </span>\n\n      <span\n        className={cn(\n          \"flex flex-col items-end gap-1 pt-0.5 font-mono text-[11px] leading-4 tabular-nums\",\n          model.disabled && \"opacity-55\",\n        )}\n      >\n        {model.contextWindow !== undefined && (\n          <span className=\"text-[color:var(--bjork-text-medium)]\">\n            {formatTokens(model.contextWindow)}\n            <span className=\"sr-only\"> token context</span>\n          </span>\n        )}\n        {model.speed && <SpeedBars speed={model.speed} />}\n        {model.price && (\n          <span className=\"text-[color:var(--bjork-text-faint)]\">\n            <span aria-hidden=\"true\">\n              {money(model.price.input)}/{money(model.price.output)}\n            </span>\n            <span className=\"sr-only\">\n              {money(model.price.input)} input and {money(model.price.output)} output per million tokens\n            </span>\n          </span>\n        )}\n      </span>\n    </div>\n  );\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/ai/model-selector.tsx"
    },
    {
      "path": "components/bjork-ui/_core/a11y.tsx",
      "content": "import type { ReactNode } from \"react\";\n\n// Text for assistive tech only.\nexport function VisuallyHidden({ children }: { children: ReactNode }) {\n  return <span className=\"sr-only\">{children}</span>;\n}\n\n// Announces `message` when it changes. Same text re-rendered does not re-announce.\nexport function LiveRegion({\n  message,\n  politeness = \"polite\",\n}: {\n  message: string;\n  politeness?: \"polite\" | \"assertive\";\n}) {\n  return (\n    <span role=\"status\" aria-live={politeness} aria-atomic=\"true\" className=\"sr-only\">\n      {message}\n    </span>\n  );\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/_core/a11y.tsx"
    },
    {
      "path": "components/bjork-ui/ai/_shared.ts",
      "content": "\"use client\";\n\n// Shared plumbing for the bjork-ui AI components: tone tokens, reduced motion, controllable state and\n// number formatting. Every AI component imports from here so they read as one family.\n\nimport {\n  useCallback,\n  useLayoutEffect,\n  useRef,\n  useState,\n  useSyncExternalStore,\n  type CSSProperties,\n} from \"react\";\nimport { useReducedMotion } from \"framer-motion\";\nimport { BJORK_PALETTE, type BjorkTone } from \"@/components/bjork-ui/_core/palette\";\nimport { useBjorkTone } from \"@/components/bjork-ui/_core/tone\";\nimport { surfaceVars } from \"@/components/bjork-ui/_core/surface\";\n\nexport type { BjorkTone };\nexport type BjorkPalette = (typeof BJORK_PALETTE)[BjorkTone];\n\nconst noopSubscribe = () => () => {};\n\n/** False on the server and the first client render, true after hydration. */\nexport function useHydrated(): boolean {\n  return useSyncExternalStore(\n    noopSubscribe,\n    () => true,\n    () => false,\n  );\n}\n\n/** Hydration-safe reduced motion: both sides report \"not reduced\" until mount, then the real value applies. */\nexport function useReduceMotion(): boolean {\n  const hydrated = useHydrated();\n  const reduced = useReducedMotion();\n  return hydrated && reduced === true;\n}\n\n/**\n * Resolves the tone and returns the CSS custom properties for it. Spread `style` on the component root so an\n * explicit `tone` prop wins over the page theme, and status colours (success, warning, error) are always defined.\n */\nexport function useAiTone(toneProp?: BjorkTone) {\n  const tone = useBjorkTone(toneProp);\n  const pal = BJORK_PALETTE[tone];\n  const style = {\n    ...surfaceVars(tone),\n    \"--bjork-text\": pal.text,\n    \"--bjork-text-medium\": pal.textMedium,\n    \"--bjork-text-muted\": pal.textMuted,\n    \"--bjork-text-soft\": pal.textSoft,\n    \"--bjork-text-faint\": pal.textFaint,\n    \"--bjork-hair\": pal.hair,\n    \"--bjork-border\": pal.border,\n    \"--bjork-border-strong\": pal.borderStrong,\n    \"--bjork-surface\": pal.surface,\n    \"--bjork-raised\": pal.raised,\n    \"--bjork-surface-active\": pal.active,\n    \"--bjork-accent\": pal.accent,\n    \"--bjork-accent-ink\": pal.accentInk,\n    \"--bjork-accent-fill\": pal.accentFill,\n    \"--bjork-accent-soft\": pal.accentSoft,\n    \"--bjork-accent-muted\": pal.accentMuted,\n    \"--bjork-accent-foreground\": pal.accentFg,\n    \"--bjork-success\": pal.success,\n    \"--bjork-warning\": pal.warning,\n    \"--bjork-error\": pal.error,\n    \"--bjork-ring-offset\": pal.bg,\n    colorScheme: tone,\n  } as CSSProperties;\n  return { tone, pal, style };\n}\n\n/** Classes for the shared keyboard focus ring. */\nexport const FOCUS_RING =\n  \"outline-none focus-visible:ring-2 focus-visible:ring-[color:var(--bjork-accent)] focus-visible:ring-offset-2 focus-visible:ring-offset-[color:var(--bjork-ring-offset)]\";\n\n/** Classes for the shared press feedback. */\nexport const PRESS = \"transition-transform duration-150 ease-out active:scale-[0.97] motion-reduce:transition-none\";\n\n/**\n * Controlled-or-uncontrolled state. Pass `value` to control it; `onChange` fires for every change either way.\n */\nexport function useControllable<T>(\n  value: T | undefined,\n  defaultValue: T,\n  onChange?: (next: T) => void,\n): [T, (next: T) => void] {\n  const controlled = value !== undefined;\n  const [inner, setInner] = useState(defaultValue);\n  const current = controlled ? value : inner;\n  const onChangeRef = useRef(onChange);\n  useLayoutEffect(() => {\n    onChangeRef.current = onChange;\n  });\n  const set = useCallback(\n    (next: T) => {\n      if (!controlled) setInner(next);\n      onChangeRef.current?.(next);\n    },\n    [controlled],\n  );\n  return [current, set];\n}\n\n/** 1234 -> \"1,234\", 18400 -> \"18.4k\", 1_200_000 -> \"1.2M\". */\nexport function formatTokens(n: number): string {\n  if (n < 10_000) return Math.round(n).toLocaleString(\"en-US\");\n  if (n < 1_000_000) return `${(n / 1000).toFixed(n < 100_000 ? 1 : 0).replace(/\\.0$/, \"\")}k`;\n  return `${(n / 1_000_000).toFixed(n < 10_000_000 ? 2 : 1).replace(/\\.?0+$/, \"\")}M`;\n}\n\n/** US dollars with sub-cent precision when it matters: 0.0042 -> \"$0.0042\", 12.5 -> \"$12.50\". */\nexport function formatCost(usd: number): string {\n  if (usd === 0) return \"$0.00\";\n  if (Math.abs(usd) < 0.01) return `$${usd.toFixed(4)}`;\n  if (Math.abs(usd) < 1) return `$${usd.toFixed(3)}`;\n  return `$${usd.toLocaleString(\"en-US\", { minimumFractionDigits: 2, maximumFractionDigits: 2 })}`;\n}\n\n/** 640 -> \"640ms\", 4200 -> \"4.2s\", 95000 -> \"1m 35s\". */\nexport function formatDuration(ms: number): string {\n  if (ms < 1000) return `${Math.round(ms)}ms`;\n  if (ms < 60_000) return `${(ms / 1000).toFixed(1)}s`;\n  const m = Math.floor(ms / 60_000);\n  const s = Math.round((ms % 60_000) / 1000);\n  return `${m}m ${s}s`;\n}\n\n/** 2_400_000 bytes -> \"2.4 MB\". */\nexport function formatBytes(bytes: number): string {\n  if (bytes < 1024) return `${bytes} B`;\n  const units = [\"KB\", \"MB\", \"GB\"];\n  let v = bytes / 1024;\n  let i = 0;\n  while (v >= 1024 && i < units.length - 1) {\n    v /= 1024;\n    i++;\n  }\n  return `${v.toFixed(v < 10 ? 1 : 0)} ${units[i]}`;\n}\n\n/** Shimmer keyframes for \"working\" text. Mount once with <style href=... precedence=\"default\">. */\nexport const SHIMMER_TEXT_CSS =\n  \"@keyframes bjork-ai-shimmer{from{background-position:100% 0}to{background-position:0% 0}}\" +\n  \".bjork-ai-shimmer{background-image:linear-gradient(90deg,var(--bjork-text-muted) 0%,var(--bjork-text-muted) 40%,var(--bjork-text) 50%,var(--bjork-text-muted) 60%,var(--bjork-text-muted) 100%);background-size:300% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;animation:bjork-ai-shimmer 1.8s linear infinite}\" +\n  \"@media (prefers-reduced-motion: reduce){.bjork-ai-shimmer{animation:none;background:none;color:var(--bjork-text-muted)}}\";\n\n/** CANON §2. Panel = a component's own root surface; Card = a standalone card; Tile = a card inside a panel; Well = recessed code/field. */\nexport const AI_PANEL = \"rounded-[20px] border border-[color:var(--bjork-border-muted)] bg-[color:var(--bjork-surface)] p-4 shadow-[var(--bjork-shadow-surface)]\";\nexport const AI_CARD = \"rounded-[18px] border border-[color:var(--bjork-border-muted)] bg-[color:var(--bjork-surface)] shadow-[var(--bjork-shadow-surface)]\";\nexport const AI_TILE = \"rounded-[12px] border border-[color:var(--bjork-border-muted)] bg-[color:var(--bjork-surface)] shadow-[var(--bjork-shadow-surface)]\";\nexport const AI_WELL = \"rounded-[8px] border border-[color:var(--bjork-border)] bg-[color:var(--bjork-field-inset)] shadow-[var(--bjork-shadow-inset)]\";\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/ai/_shared.ts"
    },
    {
      "path": "components/bjork-ui/_core/palette.ts",
      "content": "export type BjorkTone = \"dark\" | \"light\";\n\n// Canvas, WebGL and SVG attribute colours. DOM code uses the CSS tokens with these as fallbacks.\nexport const BJORK_PALETTE = {\n  dark: {\n    bg: \"#050505\", stage: \"#111111\", surface: \"#121212\", raised: \"#161616\", active: \"#202020\",\n    border: \"#232323\", borderStrong: \"#343434\",\n    text: \"#ededed\", textMedium: \"rgba(237,237,237,0.72)\", textMuted: \"rgba(237,237,237,0.6)\",\n    textSoft: \"rgba(237,237,237,0.5)\", textFaint: \"rgba(237,237,237,0.22)\", hair: \"rgba(237,237,237,0.12)\",\n    accent: \"#ec5c13\", accentInk: \"#ec5c13\", accentFill: \"#b84a12\", accentSoft: \"rgba(236,92,19,0.12)\", accentMuted: \"rgba(236,92,19,0.24)\",\n    accentFg: \"#fff2ea\", success: \"#4cc38a\", warning: \"#f2b544\", error: \"#ff5c4d\",\n  },\n  light: {\n    bg: \"#f7f5ef\", stage: \"#f7f5ef\", surface: \"#fffcf6\", raised: \"#f5efe3\", active: \"#efe7d8\",\n    border: \"#eee6db\", borderStrong: \"#e1d7c8\",\n    text: \"#171717\", textMedium: \"rgba(23,23,23,0.78)\", textMuted: \"rgba(23,23,23,0.68)\",\n    textSoft: \"rgba(23,23,23,0.62)\", textFaint: \"rgba(23,23,23,0.22)\", hair: \"rgba(23,23,23,0.10)\",\n    accent: \"#ec7d43\", accentInk: \"#b4531f\", accentFill: \"#ec7d43\", accentSoft: \"rgba(236,125,67,0.10)\", accentMuted: \"rgba(236,125,67,0.20)\",\n    accentFg: \"#3f2112\", success: \"#1f8a55\", warning: \"#a86b00\", error: \"#c8361f\",\n  },\n} as const;\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/_core/palette.ts"
    },
    {
      "path": "components/bjork-ui/_core/tone.ts",
      "content": "\"use client\";\n\nimport { useSyncExternalStore } from \"react\";\nimport { useTheme } from \"next-themes\";\nimport type { BjorkTone } from \"./palette\";\n\nconst subscribeNoop = () => () => {};\nconst getMounted = () => true;\nconst getServerMounted = () => false;\n\n/**\n * Resolves the tone for a component. An explicit `tone` always wins.\n * Otherwise it follows next-themes' resolved theme, but only after mount,\n * so the server render and first client render agree on dark.\n */\nexport function useBjorkTone(tone?: BjorkTone): BjorkTone {\n  const { resolvedTheme } = useTheme();\n  const mounted = useSyncExternalStore(subscribeNoop, getMounted, getServerMounted);\n  if (tone) return tone;\n  if (!mounted) return \"dark\";\n  return resolvedTheme === \"light\" ? \"light\" : \"dark\";\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/_core/tone.ts"
    },
    {
      "path": "components/bjork-ui/_core/surface.ts",
      "content": "import type { CSSProperties } from \"react\";\nimport type { BjorkTone } from \"./palette\";\n\n// The library surface (CANON.md §1). Values mirror app/globals.css :root and .dark. Change both together.\nexport const BJORK_SURFACE = {\n  light: {\n    surface: \"#fffcf6\", surfaceMuted: \"rgba(250, 246, 237, 0.94)\", surfaceHover: \"#f5efe3\", surfaceActive: \"#efe7d8\",\n    panel: \"#f8f2e7\", menu: \"rgba(255, 252, 246, 0.98)\", field: \"rgba(255, 252, 246, 0.96)\",\n    fieldMuted: \"rgba(248, 242, 231, 0.82)\", fieldInset: \"rgba(239, 231, 216, 0.72)\",\n    border: \"#eee6db\", borderMuted: \"#f5ede2\", borderStrong: \"#e1d7c8\",\n    shadowSurface: \"inset 0 7px 14px rgba(88, 72, 49, 0.045), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.92), inset 1px 0 0 rgba(88, 72, 49, 0.026), inset -1px 0 0 rgba(255, 255, 255, 0.68), 0 14px 22px -9px rgba(66, 52, 33, 0.11)\",\n    shadowSoft: \"inset 0 1px 0 rgba(88, 72, 49, 0.045), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.86)\",\n    shadowPanel: \"inset 0 1px 0 rgba(88, 72, 49, 0.04), inset 1px 0 0 rgba(88, 72, 49, 0.024), inset -1px 0 0 rgba(255, 255, 255, 0.64), 0 18px 38px -30px rgba(66, 52, 33, 0.2)\",\n    shadowMenu: \"inset 0 1px 0 rgba(88, 72, 49, 0.04), inset 0 12px 24px rgba(88, 72, 49, 0.022), inset 1px 0 0 rgba(88, 72, 49, 0.024), inset -1px 0 0 rgba(255, 255, 255, 0.62), 0 22px 44px -26px rgba(66, 52, 33, 0.22)\",\n    shadowInset: \"inset 0 1px 10px rgba(88, 72, 49, 0.12), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.72)\",\n  },\n  dark: {\n    surface: \"#121212\", surfaceMuted: \"rgba(22, 22, 22, 0.92)\", surfaceHover: \"#161616\", surfaceActive: \"#202020\",\n    panel: \"#0d0d0d\", menu: \"rgba(18, 18, 18, 0.98)\", field: \"rgba(18, 18, 18, 0.95)\",\n    fieldMuted: \"rgba(18, 18, 18, 0.55)\", fieldInset: \"rgba(9, 9, 9, 0.75)\",\n    border: \"#232323\", borderMuted: \"#1c1c1c\", borderStrong: \"#343434\",\n    shadowSurface: \"inset 0 7px 14px rgba(255, 255, 255, 0.03), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.06), 0 14px 20px -6px rgba(0, 0, 0, 0.45)\",\n    shadowSoft: \"inset 0 1px 0 rgba(255, 255, 255, 0.045)\",\n    shadowPanel: \"inset 0 1px 0 rgba(255, 255, 255, 0.035), 0 18px 36px -28px rgba(0, 0, 0, 0.9)\",\n    shadowMenu: \"inset 0 1px 0 rgba(255, 255, 255, 0.055), inset 0 12px 24px rgba(255, 255, 255, 0.018), inset 0 -18px 26px rgba(0, 0, 0, 0.24), 0 22px 42px -22px rgba(0, 0, 0, 0.9)\",\n    shadowInset: \"inset 0 1px 10px rgba(0, 0, 0, 0.45)\",\n  },\n} as const;\n\n/** Writes the surface tokens for a pinned tone as --bjork-* custom properties. Spread first; kit-specific keys may override. */\nexport function surfaceVars(tone: BjorkTone): CSSProperties {\n  const s = BJORK_SURFACE[tone];\n  return {\n    \"--bjork-surface\": s.surface, \"--bjork-surface-muted\": s.surfaceMuted, \"--bjork-surface-hover\": s.surfaceHover,\n    \"--bjork-surface-active\": s.surfaceActive, \"--bjork-panel\": s.panel, \"--bjork-menu\": s.menu, \"--bjork-field\": s.field,\n    \"--bjork-field-muted\": s.fieldMuted, \"--bjork-field-inset\": s.fieldInset, \"--bjork-border\": s.border,\n    \"--bjork-border-muted\": s.borderMuted, \"--bjork-border-strong\": s.borderStrong,\n    \"--bjork-shadow-surface\": s.shadowSurface, \"--bjork-shadow-soft\": s.shadowSoft, \"--bjork-shadow-panel\": s.shadowPanel,\n    \"--bjork-shadow-menu\": s.shadowMenu, \"--bjork-shadow-inset\": s.shadowInset,\n  } as CSSProperties;\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/_core/surface.ts"
    },
    {
      "path": "components/bjork-ui/utilities/stroke-morph-icon.tsx",
      "content": "\"use client\";\n\nimport { useLayoutEffect, useRef, useState, type RefObject } from \"react\";\nimport { useReducedMotion } from \"framer-motion\";\nimport { cn } from \"@/lib/utils\";\nimport { useVisibleLoop } from \"@/components/bjork-ui/_core/loop\";\nimport { stepSpring, type SpringState } from \"@/components/bjork-ui/_core/spring\";\nimport { easeCss } from \"@/components/bjork-ui/_core/motion\";\n\nexport type StrokeIconName =\n  | \"menu\"\n  | \"equal\"\n  | \"minus\"\n  | \"plus\"\n  | \"close\"\n  | \"chevron-down\"\n  | \"chevron-up\"\n  | \"chevron-right\"\n  | \"chevron-left\"\n  | \"arrow-right\"\n  | \"arrow-down\"\n  | \"arrow-left\"\n  | \"arrow-up\"\n  | \"check\"\n  | \"play\"\n  | \"pause\"\n  | \"dot\"\n  | \"ellipsis\"\n  | \"busy\"\n  | (string & {});\n\n// Three line segments in a 24 x 24 box. `hidden` lines render at opacity 0 and collapse\n// onto the centroid of the visible endpoints. `group` icons share geometry and only rotate.\nexport interface StrokeIconDef {\n  lines: [number, number, number, number][];\n  hidden?: [boolean, boolean, boolean];\n  group?: string;\n  rotation?: number;\n  spin?: boolean;\n  strokeScale?: number;\n}\n\nexport interface StrokeMorphIconProps {\n  name: StrokeIconName;\n  size?: number;\n  strokeWidth?: number;\n  color?: string;\n  spring?: { stiffness: number; damping: number; mass: number };\n  spin?: boolean;\n  label?: string;\n  className?: string;\n}\n\ntype Seg = [number, number, number, number];\n\nconst DEFAULT_SPRING = { stiffness: 380, damping: 30, mass: 0.7 };\nconst CROSS_LINES: StrokeIconDef[\"lines\"] = [\n  [12, 5, 12, 19],\n  [5, 12, 19, 12],\n  [12, 12, 12, 12],\n];\nconst CHEVRON_LINES: StrokeIconDef[\"lines\"] = [\n  [6, 9, 12, 15],\n  [12, 15, 18, 9],\n  [12, 15, 12, 15],\n];\nconst ARROW_LINES: StrokeIconDef[\"lines\"] = [\n  [5, 12, 19, 12],\n  [13, 6, 19, 12],\n  [13, 18, 19, 12],\n];\n\nexport const strokeIcons: Record<string, StrokeIconDef> = {\n  menu: {\n    lines: [\n      [4, 7, 20, 7],\n      [4, 12, 20, 12],\n      [4, 17, 20, 17],\n    ],\n  },\n  equal: {\n    lines: [\n      [5, 9, 19, 9],\n      [5, 15, 19, 15],\n      [12, 12, 12, 12],\n    ],\n    hidden: [false, false, true],\n  },\n  minus: {\n    lines: [\n      [5, 12, 19, 12],\n      [12, 12, 12, 12],\n      [12, 12, 12, 12],\n    ],\n    hidden: [false, true, true],\n  },\n  plus: { lines: CROSS_LINES, hidden: [false, false, true], group: \"cross\", rotation: 0 },\n  close: { lines: CROSS_LINES, hidden: [false, false, true], group: \"cross\", rotation: 45 },\n  \"chevron-down\": { lines: CHEVRON_LINES, hidden: [false, false, true], group: \"chevron\", rotation: 0 },\n  \"chevron-up\": { lines: CHEVRON_LINES, hidden: [false, false, true], group: \"chevron\", rotation: 180 },\n  \"chevron-right\": { lines: CHEVRON_LINES, hidden: [false, false, true], group: \"chevron\", rotation: -90 },\n  \"chevron-left\": { lines: CHEVRON_LINES, hidden: [false, false, true], group: \"chevron\", rotation: 90 },\n  \"arrow-right\": { lines: ARROW_LINES, group: \"arrow\", rotation: 0 },\n  \"arrow-down\": { lines: ARROW_LINES, group: \"arrow\", rotation: 90 },\n  \"arrow-left\": { lines: ARROW_LINES, group: \"arrow\", rotation: 180 },\n  \"arrow-up\": { lines: ARROW_LINES, group: \"arrow\", rotation: -90 },\n  check: {\n    lines: [\n      [5, 12.5, 10, 17.5],\n      [10, 17.5, 19, 7],\n      [10, 17.5, 10, 17.5],\n    ],\n    hidden: [false, false, true],\n  },\n  // The +0.75px optical x nudge is already in these coordinates (OPTICAL-ALIGNMENT R2).\n  play: {\n    lines: [\n      [8.75, 5, 8.75, 19],\n      [8.75, 5, 19.75, 12],\n      [8.75, 19, 19.75, 12],\n    ],\n  },\n  pause: {\n    lines: [\n      [9, 6, 9, 18],\n      [15, 6, 15, 18],\n      [12, 12, 12, 12],\n    ],\n    hidden: [false, false, true],\n  },\n  dot: {\n    lines: [\n      [12, 12, 12, 12],\n      [12, 12, 12, 12],\n      [12, 12, 12, 12],\n    ],\n    hidden: [false, true, true],\n    strokeScale: 1.6,\n  },\n  ellipsis: {\n    lines: [\n      [6, 12, 6, 12],\n      [12, 12, 12, 12],\n      [18, 12, 18, 12],\n    ],\n  },\n  busy: {\n    lines: [\n      [12, 12, 12, 5],\n      [12, 12, 18.06, 15.5],\n      [12, 12, 5.94, 15.5],\n    ],\n    group: \"busy\",\n    rotation: 0,\n    spin: true,\n  },\n};\n\n// Optical nudges, in the icon's own frame (the group rotation carries them with the icon).\n// Measured with the blur test (OPTICAL-ALIGNMENT R1 / checklist 1 and 4): arrows carry their\n// visual weight toward the head, so they move back toward the tail; the check's weight sits low.\nconst OPTICAL_NUDGE = new Map<StrokeIconDef, [number, number]>([\n  [strokeIcons[\"arrow-right\"], [-1.6, 0]], // arrow-right: weight +1.63 units right of centre\n  [strokeIcons[\"arrow-down\"], [-1.6, 0]],\n  [strokeIcons[\"arrow-left\"], [-1.6, 0]],\n  [strokeIcons[\"arrow-up\"], [-1.6, 0]],\n  [strokeIcons.check, [0, -0.9]], // check: weight +0.94 units below centre\n]);\n\nfunction nudgeOf(def: StrokeIconDef): [number, number] {\n  return OPTICAL_NUDGE.get(def) ?? [0, 0];\n}\n\nfunction isSeg(v: unknown): v is Seg {\n  return Array.isArray(v) && v.length === 4 && v.every((n) => typeof n === \"number\" && Number.isFinite(n));\n}\n\n// Registers a custom icon. Throws a TypeError unless it has exactly three finite line segments.\nexport function defineStrokeIcon(name: string, def: StrokeIconDef): void {\n  if (!name) throw new TypeError(\"defineStrokeIcon: name must be a non-empty string\");\n  if (!Array.isArray(def.lines) || def.lines.length !== 3 || !def.lines.every(isSeg)) {\n    throw new TypeError(`defineStrokeIcon(\"${name}\"): lines must be exactly 3 [x1, y1, x2, y2] segments`);\n  }\n  if (def.hidden !== undefined && (!Array.isArray(def.hidden) || def.hidden.length !== 3)) {\n    throw new TypeError(`defineStrokeIcon(\"${name}\"): hidden must have exactly 3 booleans`);\n  }\n  strokeIcons[name] = def;\n}\n\nconst warnedNames = new Set<string>();\n\nfunction resolveStrokeIcon(name: string): StrokeIconDef {\n  if (Object.prototype.hasOwnProperty.call(strokeIcons, name)) return strokeIcons[name];\n  if (process.env.NODE_ENV !== \"production\" && !warnedNames.has(name)) {\n    warnedNames.add(name);\n    console.warn(`StrokeMorphIcon: unknown name \"${name}\", rendering \"dot\" instead.`);\n  }\n  return strokeIcons.dot;\n}\n\n// Effective geometry: hidden lines collapse onto the centroid of the visible endpoints.\nconst effCache = new WeakMap<StrokeIconDef, Seg[]>();\n\nfunction effOf(def: StrokeIconDef): Seg[] {\n  const cached = effCache.get(def);\n  if (cached) return cached;\n  const visible = [0, 1, 2].map((i) => !def.hidden?.[i]);\n  let sx = 0;\n  let sy = 0;\n  let n = 0;\n  def.lines.forEach(([x1, y1, x2, y2], i) => {\n    if (!visible[i]) return;\n    sx += x1 + x2;\n    sy += y1 + y2;\n    n += 2;\n  });\n  const cx = n ? sx / n : 12;\n  const cy = n ? sy / n : 12;\n  const eff = def.lines.map((seg, i): Seg => (visible[i] ? seg : [cx, cy, cx, cy]));\n  effCache.set(def, eff);\n  return eff;\n}\n\nfunction visibleOf(def: StrokeIconDef): boolean[] {\n  return [0, 1, 2].map((i) => !def.hidden?.[i]);\n}\n\ninterface Assignment {\n  perm: number[]; // source line i goes to target line perm[i]\n  flip: boolean[]; // swap that line's endpoints\n}\n\nconst PERMS = [\n  [0, 1, 2],\n  [0, 2, 1],\n  [1, 0, 2],\n  [1, 2, 0],\n  [2, 0, 1],\n  [2, 1, 0],\n];\n\n// Best endpoint matching: 6 permutations, and per line the cheaper of the 2 endpoint flips\n// (the 8 flip combinations reduce to this because each line's flip is independent).\nfunction bestAssignment(src: Seg[], dst: Seg[]): Assignment {\n  let best: Assignment = { perm: [0, 1, 2], flip: [false, false, false] };\n  let bestCost = Infinity;\n  for (const perm of PERMS) {\n    let total = 0;\n    const flip: boolean[] = [];\n    for (let i = 0; i < 3; i++) {\n      const [ax1, ay1, ax2, ay2] = src[i];\n      const [bx1, by1, bx2, by2] = dst[perm[i]];\n      const straight = (ax1 - bx1) ** 2 + (ay1 - by1) ** 2 + (ax2 - bx2) ** 2 + (ay2 - by2) ** 2;\n      const crossed = (ax1 - bx2) ** 2 + (ay1 - by2) ** 2 + (ax2 - bx1) ** 2 + (ay2 - by1) ** 2;\n      flip.push(crossed < straight);\n      total += Math.min(straight, crossed);\n    }\n    if (total < bestCost) {\n      bestCost = total;\n      best = { perm: [...perm], flip };\n    }\n  }\n  return best;\n}\n\n// Memoised per (from, to) pair of defs. Used when the icon has settled on `from`.\nconst matchCache = new WeakMap<StrokeIconDef, WeakMap<StrokeIconDef, Assignment>>();\n\nfunction canonicalMatch(from: StrokeIconDef, to: StrokeIconDef): Assignment {\n  let inner = matchCache.get(from);\n  if (!inner) {\n    inner = new WeakMap();\n    matchCache.set(from, inner);\n  }\n  const cached = inner.get(to);\n  if (cached) return cached;\n  const result = bestAssignment(effOf(from), effOf(to));\n  inner.set(to, result);\n  return result;\n}\n\n// Shortest signed rotation from `from` to `to` (degrees), in (-180, 180].\nfunction shortestDelta(from: number, to: number): number {\n  return ((((to - from) % 360) + 540) % 360) - 180;\n}\n\n// Attributes are written to 2 decimals (0.005 of a 24-unit box). Finer precision only adds settle time.\nconst fmt = (v: number) => String(Math.round(v * 100) / 100);\nconst COORDS = [\"x1\", \"y1\", \"x2\", \"y2\"] as const;\n\ninterface MorphEls {\n  group: SVGGElement;\n  lines: (SVGLineElement | null)[];\n}\n\n// Owns the imperative morph. React renders once; every frame writes attributes through refs.\nclass Morph {\n  private els: MorphEls | null = null;\n  private cur = new Float64Array(12);\n  private from = new Float64Array(12);\n  private to = new Float64Array(12);\n  private curAngle: number;\n  private fromAngle: number;\n  private toAngle: number;\n  private curScale = 1;\n  private fromScale = 1;\n  private toScale = 1;\n  private curNudge: [number, number];\n  private fromNudge: [number, number];\n  private toNudge: [number, number];\n  private slotLine = [0, 1, 2]; // settled: element s shows canonical line slotLine[s]\n  private targetLine = [0, 1, 2];\n  private visibleTo = [true, true, true];\n  private spring: SpringState = { x: 0, v: 0 };\n  private written: (string | undefined)[] = [];\n  private strokeWidth = 2;\n  private active = false;\n  private cfg = DEFAULT_SPRING;\n  target: StrokeIconDef;\n\n  constructor(def: StrokeIconDef) {\n    this.target = def;\n    effOf(def).forEach((seg, s) => this.to.set(seg, s * 4));\n    this.cur.set(this.to);\n    this.from.set(this.to);\n    this.curAngle = this.fromAngle = this.toAngle = def.rotation ?? 0;\n    this.curScale = this.fromScale = this.toScale = def.strokeScale ?? 1;\n    this.curNudge = this.fromNudge = this.toNudge = nudgeOf(def);\n  }\n\n  bind(els: MorphEls) {\n    this.els = els;\n    this.paint(1);\n  }\n\n  setConfig(cfg: { stiffness: number; damping: number; mass: number }) {\n    this.cfg = cfg;\n  }\n\n  setStrokeWidth(strokeWidth: number) {\n    this.strokeWidth = strokeWidth;\n    this.paint(this.active ? this.spring.x : 1);\n  }\n\n  retarget(next: StrokeIconDef, reduce: boolean) {\n    const prev = this.target;\n    const sameGroup = !!next.group && next.group === prev.group;\n    this.target = next;\n\n    if (!sameGroup) {\n      let assignment: Assignment;\n      if (this.active) {\n        // Mid-flight: match from the current lerped geometry, not from a settled def.\n        const current: Seg[] = [0, 1, 2].map((s) => [\n          this.cur[s * 4],\n          this.cur[s * 4 + 1],\n          this.cur[s * 4 + 2],\n          this.cur[s * 4 + 3],\n        ]);\n        assignment = bestAssignment(current, effOf(next));\n      } else {\n        assignment = canonicalMatch(prev, next);\n      }\n      const eff = effOf(next);\n      const visible = visibleOf(next);\n      for (let s = 0; s < 3; s++) {\n        const c = this.active ? s : this.slotLine[s];\n        const t = this.active ? assignment.perm[s] : assignment.perm[c];\n        const flip = this.active ? assignment.flip[s] : assignment.flip[c];\n        this.targetLine[s] = t;\n        const [x1, y1, x2, y2] = eff[t];\n        const seg: Seg = flip ? [x2, y2, x1, y1] : [x1, y1, x2, y2];\n        this.to.set(seg, s * 4);\n        this.visibleTo[s] = visible[t];\n      }\n      // A line that changes visibility fades over 120ms ease-out, or instantly when reduced.\n      this.applyVisibility(reduce);\n    }\n\n    this.fromAngle = this.curAngle;\n    this.fromScale = this.curScale;\n    this.fromNudge = [this.curNudge[0], this.curNudge[1]];\n    this.from.set(this.cur);\n    this.toAngle = this.curAngle + shortestDelta(this.curAngle, next.rotation ?? 0);\n    this.toScale = next.strokeScale ?? 1;\n    this.toNudge = nudgeOf(next);\n\n    if (reduce) {\n      this.settle();\n      return;\n    }\n    this.spring.x = 0; // keep the velocity so an interrupted move carries its momentum\n    this.active = true;\n  }\n\n  private applyVisibility(reduce: boolean) {\n    const els = this.els;\n    if (!els) return;\n    for (let s = 0; s < 3; s++) {\n      const line = els.lines[s];\n      if (!line) continue;\n      line.style.transition = reduce ? \"none\" : `opacity 120ms ${easeCss.out}`;\n      line.style.opacity = this.visibleTo[s] ? \"1\" : \"0\";\n    }\n  }\n\n  // Frame step for useVisibleLoop. Returns false when idle.\n  step(dt: number): boolean {\n    if (!this.active) return false;\n    stepSpring(this.spring, 1, this.cfg, dt);\n    if (Math.abs(this.spring.x - 1) < 5e-4 && Math.abs(this.spring.v) < 5e-3) {\n      this.settle();\n      return false;\n    }\n    this.paint(this.spring.x);\n    return true;\n  }\n\n  // Snap to the exact canonical geometry of the target and go idle.\n  private settle() {\n    const eff = effOf(this.target);\n    for (let s = 0; s < 3; s++) {\n      this.slotLine[s] = this.targetLine[s];\n      const seg = eff[this.targetLine[s]];\n      this.to.set(seg, s * 4);\n    }\n    this.from.set(this.to);\n    this.fromAngle = this.toAngle;\n    this.curAngle = this.toAngle;\n    this.fromScale = this.toScale;\n    this.curScale = this.toScale;\n    this.fromNudge = [this.toNudge[0], this.toNudge[1]];\n    this.curNudge = [this.toNudge[0], this.toNudge[1]];\n    this.active = false;\n    this.spring.x = 1;\n    this.spring.v = 0;\n    this.paint(1);\n  }\n\n  private paint(p: number) {\n    const els = this.els;\n    if (!els) return;\n    for (let s = 0; s < 3; s++) {\n      const line = els.lines[s];\n      for (let k = 0; k < 4; k++) {\n        const i = s * 4 + k;\n        const v = this.from[i] + (this.to[i] - this.from[i]) * p;\n        this.cur[i] = v;\n        const str = fmt(v);\n        if (line && this.written[i] !== str) {\n          line.setAttribute(COORDS[k], str);\n          this.written[i] = str;\n        }\n      }\n    }\n    this.curAngle = this.fromAngle + (this.toAngle - this.fromAngle) * p;\n    this.curScale = this.fromScale + (this.toScale - this.fromScale) * p;\n    const nx = this.fromNudge[0] + (this.toNudge[0] - this.fromNudge[0]) * p;\n    const ny = this.fromNudge[1] + (this.toNudge[1] - this.fromNudge[1]) * p;\n    this.curNudge = [nx, ny];\n    const transform = `rotate(${fmt(this.curAngle)} 12 12) translate(${fmt(nx)} ${fmt(ny)})`;\n    if (this.written[12] !== transform) {\n      els.group.setAttribute(\"transform\", transform);\n      this.written[12] = transform;\n    }\n    const sw = fmt(this.strokeWidth * this.curScale);\n    if (this.written[13] !== sw) {\n      els.group.setAttribute(\"stroke-width\", sw);\n      this.written[13] = sw;\n    }\n  }\n}\n\nexport function StrokeMorphIcon({\n  name,\n  size = 24,\n  strokeWidth = 2,\n  color = \"currentColor\",\n  spring,\n  spin,\n  label,\n  className,\n}: StrokeMorphIconProps) {\n  const reduceMotion = useReducedMotion() === true;\n  const def = resolveStrokeIcon(name);\n\n  // Initial markup only. After mount, attributes are owned by the Morph, so these\n  // constants never change and React never overwrites an in-flight frame.\n  const [initial] = useState(() => {\n    const eff = effOf(def);\n    const visible = visibleOf(def);\n    return {\n      segs: eff,\n      visible,\n      transform: `rotate(${def.rotation ?? 0} 12 12) translate(${nudgeOf(def).map(fmt).join(\" \")})`,\n      strokeWidth: fmt(strokeWidth * (def.strokeScale ?? 1)),\n    };\n  });\n  const [morph] = useState(() => new Morph(def));\n\n  const svgRef = useRef<SVGSVGElement>(null);\n  const groupRef = useRef<SVGGElement>(null);\n  const lineRefs = useRef<(SVGLineElement | null)[]>([null, null, null]);\n\n  // The <svg> stays the root (icon-with-label rules target `>svg`). The loop hook only reads\n  // the element's box and dataset, which SVG elements also have.\n  const loop = useVisibleLoop(svgRef as RefObject<HTMLElement | null>, (dt) => morph.step(dt));\n\n  useLayoutEffect(() => {\n    if (!groupRef.current) return;\n    morph.bind({ group: groupRef.current, lines: lineRefs.current });\n  }, [morph]);\n\n  useLayoutEffect(() => {\n    morph.setConfig(spring ?? DEFAULT_SPRING);\n  });\n\n  useLayoutEffect(() => {\n    if (morph.target === def) return;\n    morph.retarget(def, reduceMotion);\n    if (!reduceMotion) loop.wake();\n  }, [def, reduceMotion, morph, loop]);\n\n  useLayoutEffect(() => {\n    morph.setStrokeWidth(strokeWidth);\n  }, [morph, strokeWidth]);\n\n  const spinning = (spin ?? def.spin) === true;\n\n  return (\n    <svg\n      ref={svgRef}\n      width={size}\n      height={size}\n      viewBox=\"0 0 24 24\"\n      fill=\"none\"\n      stroke={color}\n      strokeLinecap=\"round\"\n      strokeLinejoin=\"round\"\n      role={label ? \"img\" : undefined}\n      aria-label={label}\n      aria-hidden={label ? undefined : true}\n      className={cn(\"shrink-0\", className)}\n    >\n      <g\n        className={spinning ? \"motion-safe:animate-spin\" : undefined}\n        style={{ transformBox: \"view-box\", transformOrigin: \"12px 12px\" }}\n      >\n        <g ref={groupRef} strokeWidth={initial.strokeWidth} transform={initial.transform}>\n          {initial.segs.map(([x1, y1, x2, y2], i) => (\n            <line\n              key={i}\n              ref={(el) => {\n                lineRefs.current[i] = el;\n              }}\n              x1={x1}\n              y1={y1}\n              x2={x2}\n              y2={y2}\n              style={{ opacity: initial.visible[i] ? 1 : 0 }}\n            />\n          ))}\n        </g>\n      </g>\n    </svg>\n  );\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/utilities/stroke-morph-icon.tsx"
    },
    {
      "path": "lib/utils.ts",
      "content": "import { clsx, type ClassValue } from \"clsx\"\nimport { twMerge } from \"tailwind-merge\"\n\nexport function cn(...inputs: ClassValue[]) {\n  return twMerge(clsx(inputs))\n}\n",
      "type": "registry:lib",
      "target": "@lib/utils.ts"
    },
    {
      "path": "components/bjork-ui/_core/loop.ts",
      "content": "\"use client\";\n\nimport { useCallback, useEffect, useMemo, useRef, type RefObject } from \"react\";\n\nexport interface VisibleLoopOptions {\n  enabled?: boolean;\n  fpsCap?: number;\n  rootMargin?: string;\n}\n\n/**\n * Runs `frame(dt, t)` on requestAnimationFrame while the element is near the viewport,\n * the tab is visible and `enabled` is not false. Return `false` from `frame` to go idle\n * until `wake()` is called. Writes `data-loop` on the element: running, idle or paused.\n */\nexport function useVisibleLoop(\n  ref: RefObject<HTMLElement | null>,\n  frame: (dt: number, t: number) => boolean | void,\n  opts?: VisibleLoopOptions,\n): { wake: () => void } {\n  const enabled = opts?.enabled !== false;\n  const fpsCap = opts?.fpsCap ?? 0;\n  const rootMargin = opts?.rootMargin ?? \"96px\";\n\n  const frameRef = useRef(frame);\n  useEffect(() => {\n    frameRef.current = frame;\n  }, [frame]);\n\n  const wakeRef = useRef<() => void>(() => {});\n  const wake = useCallback(() => wakeRef.current(), []);\n\n  useEffect(() => {\n    const el = ref.current;\n    if (!el || typeof window === \"undefined\") return;\n\n    let wants = true; // false once the frame callback returns false\n    let inView = false;\n    let raf = 0;\n    let last = 0;\n    let t = 0;\n    const minFrame = fpsCap > 0 ? 1000 / fpsCap : 0;\n\n    const canRun = () => enabled && inView && document.visibilityState === \"visible\";\n    const stop = () => {\n      if (raf) cancelAnimationFrame(raf);\n      raf = 0;\n    };\n\n    const update = () => {\n      if (!enabled) {\n        stop();\n        el.dataset.loop = \"paused\";\n        return;\n      }\n      if (!wants) {\n        stop();\n        el.dataset.loop = \"idle\";\n        return;\n      }\n      if (!canRun()) {\n        stop();\n        el.dataset.loop = \"paused\";\n        return;\n      }\n      el.dataset.loop = \"running\";\n      if (!raf) {\n        last = performance.now();\n        raf = requestAnimationFrame(tick);\n      }\n    };\n\n    const tick = (now: number) => {\n      raf = 0;\n      if (!canRun() || !wants) {\n        update();\n        return;\n      }\n      const elapsed = now - last;\n      if (minFrame && elapsed < minFrame - 0.5) {\n        raf = requestAnimationFrame(tick);\n        return;\n      }\n      last = now;\n      const dt = Math.min(0.05, Math.max(0, elapsed / 1000));\n      t += dt;\n      const keep = frameRef.current(dt, t);\n      if (keep === false) {\n        wants = false;\n        update();\n        return;\n      }\n      raf = requestAnimationFrame(tick);\n    };\n\n    const observer = new IntersectionObserver(\n      ([entry]) => {\n        inView = entry.isIntersecting;\n        update();\n      },\n      { rootMargin },\n    );\n    observer.observe(el);\n\n    const onVisibility = () => update();\n    document.addEventListener(\"visibilitychange\", onVisibility);\n\n    wakeRef.current = () => {\n      wants = true;\n      update();\n    };\n\n    update();\n\n    return () => {\n      stop();\n      observer.disconnect();\n      document.removeEventListener(\"visibilitychange\", onVisibility);\n      wakeRef.current = () => {};\n    };\n  }, [ref, enabled, fpsCap, rootMargin]);\n\n  return useMemo(() => ({ wake }), [wake]);\n}\n\n// matchMedia based check. False on the server.\nexport function isCoarsePointer(): boolean {\n  if (typeof window === \"undefined\" || typeof window.matchMedia !== \"function\") return false;\n  return window.matchMedia(\"(pointer: coarse)\").matches;\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/_core/loop.ts"
    },
    {
      "path": "components/bjork-ui/_core/spring.ts",
      "content": "// Pure spring math, no React. Units: stiffness k, damping d (coefficient), mass m, time in seconds.\n\nexport interface SpringConfig {\n  stiffness: number;\n  damping: number;\n  mass: number;\n}\n\nexport interface SpringState {\n  x: number;\n  v: number;\n}\n\n// Damping ratio zeta = d / (2 * sqrt(k * m)).\nexport function dampingRatio(c: SpringConfig): number {\n  return c.damping / (2 * Math.sqrt(c.stiffness * c.mass));\n}\n\n// Exact solution of y'' = -(k/m) y - (d/m) y' for displacement y0 and velocity v0 at time t.\n// Returns displacement and velocity together so stepping can be exact, not integrated.\nfunction solveLinear(t: number, c: SpringConfig, y0: number, v0: number): { y: number; v: number } {\n  const w0 = Math.sqrt(c.stiffness / c.mass);\n  const z = dampingRatio(c);\n\n  if (Math.abs(z - 1) < 1e-9) {\n    // Critically damped.\n    const e = Math.exp(-w0 * t);\n    const b = v0 + w0 * y0;\n    return { y: e * (y0 + b * t), v: e * (b - w0 * (y0 + b * t)) };\n  }\n  if (z < 1) {\n    // Underdamped.\n    const wd = w0 * Math.sqrt(1 - z * z);\n    const a = z * w0;\n    const B = (v0 + a * y0) / wd;\n    const e = Math.exp(-a * t);\n    const cos = Math.cos(wd * t);\n    const sin = Math.sin(wd * t);\n    return {\n      y: e * (y0 * cos + B * sin),\n      v: e * (-a * (y0 * cos + B * sin) + wd * (-y0 * sin + B * cos)),\n    };\n  }\n  // Overdamped.\n  const s = w0 * Math.sqrt(z * z - 1);\n  const r1 = -z * w0 + s;\n  const r2 = -z * w0 - s;\n  const B = (v0 - r1 * y0) / (r2 - r1);\n  const A = y0 - B;\n  const e1 = Math.exp(r1 * t);\n  const e2 = Math.exp(r2 * t);\n  return { y: A * e1 + B * e2, v: A * r1 * e1 + B * r2 * e2 };\n}\n\n// Analytic position at time t for a spring from `from` to `to` with initial velocity v0.\nexport function springAt(t: number, c: SpringConfig, from = 0, to = 1, v0 = 0): number {\n  return to + solveLinear(t, c, from - to, v0).y;\n}\n\n// Overshoot as a fraction of the total travel. Zero when critically or overdamped.\nexport function overshoot(c: SpringConfig): number {\n  const z = dampingRatio(c);\n  if (z >= 1) return 0;\n  return Math.exp((-Math.PI * z) / Math.sqrt(1 - z * z));\n}\n\n// Seconds until the spring stays within epsilon of its target (fraction of travel).\n// Found by scanning backwards from a bound derived from the slowest decay rate.\nexport function settleTime(c: SpringConfig, epsilon = 0.001): number {\n  const w0 = Math.sqrt(c.stiffness / c.mass);\n  const z = dampingRatio(c);\n  const slowest = z < 1 ? z * w0 : (z - Math.sqrt(z * z - 1)) * w0;\n  const tEnd = (Math.log(1 / epsilon) / slowest) * 1.5 + 0.05;\n  const steps = 4000;\n  const dt = tEnd / steps;\n  const band = epsilon;\n  let last = 0;\n  for (let i = 0; i <= steps; i++) {\n    const t = i * dt;\n    if (Math.abs(springAt(t, c, 1, 0, 0)) >= band) last = t;\n  }\n  return last + dt;\n}\n\n// Advances the state by dt towards `target`. Uses the exact solution of the linear spring\n// (no integration), so it tracks springAt to rounding error at any step size and stays stable\n// for stiff configs where a fixed-step integrator drifts.\nexport function stepSpring(s: SpringState, target: number, c: SpringConfig, dt: number): void {\n  if (dt <= 0) return;\n  const r = solveLinear(dt, c, s.x - target, s.v);\n  s.x = target + r.y;\n  s.v = r.v;\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/_core/spring.ts"
    },
    {
      "path": "components/bjork-ui/_core/motion.ts",
      "content": "// Shared springs, easings and durations. Components import these instead of inventing values.\n\nexport const springs = {\n  press: { type: \"spring\", stiffness: 500, damping: 30, mass: 0.6 },\n  snappy: { type: \"spring\", stiffness: 400, damping: 25, mass: 1 },\n  standard: { type: \"spring\", stiffness: 300, damping: 30, mass: 0.8 },\n  soft: { type: \"spring\", stiffness: 200, damping: 25, mass: 1.2 },\n  settle: { type: \"spring\", stiffness: 380, damping: 30, mass: 0.8 },\n  blurIn: { type: \"spring\", stiffness: 400, damping: 28, mass: 0.6 },\n} as const;\n\nexport const ease = {\n  out: [0.23, 1, 0.32, 1],\n  inOut: [0.77, 0, 0.175, 1],\n  drawer: [0.32, 0.72, 0, 1],\n} as const;\n\nexport const easeCss = {\n  out: \"cubic-bezier(0.23,1,0.32,1)\",\n  inOut: \"cubic-bezier(0.77,0,0.175,1)\",\n  drawer: \"cubic-bezier(0.32,0.72,0,1)\",\n} as const;\n\nexport const durations = { press: 140, tooltip: 160, menu: 200, panel: 280 } as const; // ms\n\n// Cubic bezier easing for canvas and rAF code. Returns progress y for input x in [0, 1].\nexport function cubicBezier(x1: number, y1: number, x2: number, y2: number): (t: number) => number {\n  const cx = 3 * x1;\n  const bx = 3 * (x2 - x1) - cx;\n  const ax = 1 - cx - bx;\n  const cy = 3 * y1;\n  const by = 3 * (y2 - y1) - cy;\n  const ay = 1 - cy - by;\n  const sampleX = (s: number) => ((ax * s + bx) * s + cx) * s;\n  const sampleY = (s: number) => ((ay * s + by) * s + cy) * s;\n  const sampleDX = (s: number) => (3 * ax * s + 2 * bx) * s + cx;\n\n  const solveX = (x: number) => {\n    let s = x;\n    for (let i = 0; i < 8; i++) {\n      const err = sampleX(s) - x;\n      if (Math.abs(err) < 1e-6) return s;\n      const d = sampleDX(s);\n      if (Math.abs(d) < 1e-6) break;\n      s -= err / d;\n    }\n    let lo = 0;\n    let hi = 1;\n    s = x;\n    while (lo < hi) {\n      const v = sampleX(s);\n      if (Math.abs(v - x) < 1e-6) return s;\n      if (x > v) lo = s;\n      else hi = s;\n      s = (lo + hi) / 2;\n      if (hi - lo < 1e-7) break;\n    }\n    return s;\n  };\n\n  return (t: number) => {\n    if (t <= 0) return 0;\n    if (t >= 1) return 1;\n    return sampleY(solveX(t));\n  };\n}\n",
      "type": "registry:component",
      "target": "@components/bjork-ui/_core/motion.ts"
    }
  ],
  "cssVars": {
    "light": {
      "bjork-bg": "#f7f3ea",
      "bjork-surface": "#fffcf6",
      "bjork-surface-muted": "rgba(250, 246, 237, 0.94)",
      "bjork-surface-hover": "#f5efe3",
      "bjork-surface-active": "#efe7d8",
      "bjork-panel": "#f8f2e7",
      "bjork-menu": "rgba(255, 252, 246, 0.98)",
      "bjork-field": "rgba(255, 252, 246, 0.96)",
      "bjork-field-muted": "rgba(248, 242, 231, 0.82)",
      "bjork-field-inset": "rgba(239, 231, 216, 0.72)",
      "bjork-error-bg": "#fff0e8",
      "bjork-text": "#171717",
      "bjork-text-strong": "rgba(23, 23, 23, 0.9)",
      "bjork-text-medium": "rgba(23, 23, 23, 0.78)",
      "bjork-text-muted": "rgba(23, 23, 23, 0.68)",
      "bjork-text-soft": "rgba(23, 23, 23, 0.62)",
      "bjork-text-faint": "rgba(23, 23, 23, 0.22)",
      "bjork-inverted-text": "#fff8f0",
      "bjork-border": "#eee6db",
      "bjork-border-muted": "#f5ede2",
      "bjork-border-strong": "#e1d7c8",
      "bjork-thumb": "#a49b8e",
      "bjork-track": "#ded6ca",
      "bjork-accent": "#ec7d43",
      "bjork-accent-hover": "#f0935f",
      "bjork-accent-soft": "rgba(236, 125, 67, 0.1)",
      "bjork-accent-muted": "rgba(236, 125, 67, 0.2)",
      "bjork-accent-badge": "rgba(236, 125, 67, 0.16)",
      "bjork-accent-badge-foreground": "#8d421d",
      "bjork-accent-foreground": "#3f2112",
      "bjork-accent-fill": "#ec7d43",
      "bjork-accent-fill-hover": "#f0935f",
      "bjork-shadow-surface": "inset 0 7px 14px rgba(88, 72, 49, 0.045), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.92), inset 1px 0 0 rgba(88, 72, 49, 0.026), inset -1px 0 0 rgba(255, 255, 255, 0.68), 0 14px 22px -9px rgba(66, 52, 33, 0.11)",
      "bjork-shadow-soft": "inset 0 1px 0 rgba(88, 72, 49, 0.045), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.86)",
      "bjork-shadow-panel": "inset 0 1px 0 rgba(88, 72, 49, 0.04), inset 1px 0 0 rgba(88, 72, 49, 0.024), inset -1px 0 0 rgba(255, 255, 255, 0.64), 0 18px 38px -30px rgba(66, 52, 33, 0.2)",
      "bjork-shadow-menu": "inset 0 1px 0 rgba(88, 72, 49, 0.04), inset 0 12px 24px rgba(88, 72, 49, 0.022), inset 1px 0 0 rgba(88, 72, 49, 0.024), inset -1px 0 0 rgba(255, 255, 255, 0.62), 0 22px 44px -26px rgba(66, 52, 33, 0.22)",
      "bjork-shadow-inset": "inset 0 1px 10px rgba(88, 72, 49, 0.12), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.72)",
      "bjork-ring-offset": "#f7f3ea"
    },
    "dark": {
      "bjork-bg": "#111111",
      "bjork-surface": "#121212",
      "bjork-surface-muted": "rgba(22, 22, 22, 0.92)",
      "bjork-surface-hover": "#161616",
      "bjork-surface-active": "#202020",
      "bjork-panel": "#0d0d0d",
      "bjork-menu": "rgba(18, 18, 18, 0.98)",
      "bjork-field": "rgba(18, 18, 18, 0.95)",
      "bjork-field-muted": "rgba(18, 18, 18, 0.55)",
      "bjork-field-inset": "rgba(9, 9, 9, 0.75)",
      "bjork-error-bg": "#130d0a",
      "bjork-text": "#ededed",
      "bjork-text-strong": "rgba(237, 237, 237, 0.9)",
      "bjork-text-medium": "rgba(237, 237, 237, 0.72)",
      "bjork-text-muted": "rgba(237, 237, 237, 0.6)",
      "bjork-text-soft": "rgba(237, 237, 237, 0.5)",
      "bjork-text-faint": "rgba(237, 237, 237, 0.22)",
      "bjork-inverted-text": "#080808",
      "bjork-border": "#232323",
      "bjork-border-muted": "#1c1c1c",
      "bjork-border-strong": "#343434",
      "bjork-thumb": "#626262",
      "bjork-track": "#090909",
      "bjork-accent": "#ec5c13",
      "bjork-accent-hover": "#f07832",
      "bjork-accent-soft": "rgba(236, 92, 19, 0.12)",
      "bjork-accent-muted": "rgba(236, 92, 19, 0.24)",
      "bjork-accent-badge": "#b84a12",
      "bjork-accent-badge-foreground": "#fff2ea",
      "bjork-accent-foreground": "#fff2ea",
      "bjork-accent-fill": "#b84a12",
      "bjork-accent-fill-hover": "#a84a14",
      "bjork-shadow-surface": "inset 0 7px 14px rgba(255, 255, 255, 0.03), inset 0 0.5px 0.5px rgba(255, 255, 255, 0.06), 0 14px 20px -6px rgba(0, 0, 0, 0.45)",
      "bjork-shadow-soft": "inset 0 1px 0 rgba(255, 255, 255, 0.045)",
      "bjork-shadow-panel": "inset 0 1px 0 rgba(255, 255, 255, 0.035), 0 18px 36px -28px rgba(0, 0, 0, 0.9)",
      "bjork-shadow-menu": "inset 0 1px 0 rgba(255, 255, 255, 0.055), inset 0 12px 24px rgba(255, 255, 255, 0.018), inset 0 -18px 26px rgba(0, 0, 0, 0.24), 0 22px 42px -22px rgba(0, 0, 0, 0.9)",
      "bjork-shadow-inset": "inset 0 1px 10px rgba(0, 0, 0, 0.45)",
      "bjork-ring-offset": "#080808"
    }
  },
  "css": {
    ".bjork-range": {
      "box-shadow": "inset 0 1px 1px rgba(255, 255, 255, 0.04), 0 0 14px rgba(189, 69, 20, 0.06)"
    },
    ".bjork-range::-webkit-slider-thumb": {
      "appearance": "none",
      "width": "16px",
      "height": "8px",
      "border": "0",
      "border-radius": "999px",
      "background": "var(--bjork-thumb)",
      "box-shadow": "inset 0 1px 0 rgba(255, 255, 255, 0.18), 0 0 0 1px rgba(0, 0, 0, 0.42)"
    },
    ".bjork-range::-moz-range-thumb": {
      "width": "16px",
      "height": "8px",
      "border": "0",
      "border-radius": "999px",
      "background": "var(--bjork-thumb)",
      "box-shadow": "inset 0 1px 0 rgba(255, 255, 255, 0.18), 0 0 0 1px rgba(0, 0, 0, 0.42)"
    },
    ".bjork-layered-button-accent, .bjork-layered-button-raised": {
      "position": "relative",
      "isolation": "isolate",
      "appearance": "none",
      "overflow": "hidden",
      "border": "0",
      "border-radius": "13px",
      "box-shadow": "inset 0 1px 0 #ffffff38, 0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a",
      "transition": "filter 150ms ease-out, box-shadow 150ms ease-out"
    },
    ".bjork-layered-button-accent::after, .bjork-layered-button-raised::after": {
      "position": "absolute",
      "inset": "0",
      "pointer-events": "none",
      "content": "\"\"",
      "border": "1.5px solid transparent",
      "border-radius": "inherit",
      "background": "linear-gradient(#ffffffb8, #0000003d 41% 75%, #ffffff47) border-box",
      "mix-blend-mode": "overlay",
      "-webkit-mask-image": "linear-gradient(#000, #000), linear-gradient(#000, #000)",
      "mask-image": "linear-gradient(#000, #000), linear-gradient(#000, #000)",
      "-webkit-mask-clip": "padding-box, border-box",
      "mask-clip": "padding-box, border-box",
      "-webkit-mask-origin": "padding-box, border-box",
      "mask-origin": "padding-box, border-box",
      "-webkit-mask-composite": "xor",
      "mask-composite": "exclude"
    },
    ".bjork-layered-button-accent": {
      "color": "oklch(100% 0 0)",
      "text-shadow": "0 -1px #00000040",
      "background": "radial-gradient(ellipse at -20px top, rgba(255, 255, 255, 0.14), transparent), linear-gradient(180deg, #ec5c13 0%, #ec5c13 62%, color-mix(in oklab, #ec5c13 84%, black 16%) 100%)"
    },
    ".bjork-layered-button-raised": {
      "color": "oklch(100% 0 0)",
      "text-shadow": "0 -1px #00000026",
      "background": "radial-gradient(ellipse at -20px top, #ffffff38, #fff0), linear-gradient(180deg, oklch(0.1881 0.006 265), oklch(0.5493 0.0081 265))"
    },
    ".dark .bjork-layered-button-raised": {
      "color": "oklch(0.2574 0.0056 265)",
      "text-shadow": "0 -1px #00000026",
      "background": "radial-gradient(ellipse at -20px top, #ffffff38, #fff0), linear-gradient(180deg, color-mix(in oklab, oklch(0.9674 0.0013 265) 80%, oklch(0.2574 0.0056 265) 20%), color-mix(in oklab, oklch(0.669 0.0107 265) 80%, oklch(0.2574 0.0056 265) 20%))"
    },
    "@media (hover: hover)": {
      ".bjork-layered-button-accent:hover": {
        "filter": "brightness(1.08) saturate(1.04)"
      },
      ".bjork-layered-button-raised:hover": {
        "filter": "brightness(1.08) contrast(0.9)"
      }
    }
  },
  "meta": {
    "collection": "AI",
    "registryUrl": "https://ui.isaiahbjork.com/model-selector.json",
    "installCommand": "npx shadcn@latest add https://ui.isaiahbjork.com/model-selector.json"
  },
  "type": "registry:component"
}