Are the ai2 Accent accordions free?

Yes. The whole styled layer is free and MIT licensed, like the component core.

Can I change the size?

Yes. Every variation takes a size prop of sm, md, lg or xl, aligned to the base Button height scale.

Accent accordions

Five accordions with an animated primary left bar that reacts to the open state: a growing bar, a thicker grow with fill, a glowing bar, a slide-in and a fading full bar. Each is self-contained, sized, token-driven and animates its height on open.

AccordionAccent

Installation

The styled layer is free and installs like any other ai2 component.

Run the following command

npx shadcn@latest add @ai2/accordion-accent

Dependencies, the @ai2/tokens theme and the component file are installed together.

Install dependencies

npm install motion lucide-react

Copy the source

components/ui/accordion-accent.tsx

"use client"

import * as React from "react"
import { ChevronDown } from "lucide-react"
import { AnimatePresence, motion, useReducedMotion } from "motion/react"

import { cn } from "@/lib/utils"

/* Accent accordion family: 5 left-bar accordions. When a row opens, a primary
   bar on the left edge grows or glows; the variants change how the bar behaves.
   Every export is a complete accordion: internal single-open state, a button
   header with aria-expanded, framer height auto animation. Colour comes ONLY
   from tokens. Alpha via color-mix. Under reduced-motion the bar appears
   instantly instead of transforming and the panel opens instantly. Size =
   padding + text scale. Renders without props too. */

export type StyledSize = "sm" | "md" | "lg" | "xl"

export interface StyledAccordionItem {
  value: string
  title: React.ReactNode
  content: React.ReactNode
}

interface StyledAccordionProps {
  className?: string
  size?: StyledSize
  items?: StyledAccordionItem[]
  defaultOpen?: string
}

const headerPad: Record<StyledSize, string> = {
  sm: "px-3 py-2.5 text-sm",
  md: "px-4 py-3 text-sm",
  lg: "px-5 py-4 text-base",
  xl: "px-6 py-5 text-lg",
}

const bodyPad: Record<StyledSize, string> = {
  sm: "px-3 pb-2.5 text-sm",
  md: "px-4 pb-3 text-sm",
  lg: "px-5 pb-4 text-base",
  xl: "px-6 pb-5 text-base",
}

const iconSize: Record<StyledSize, string> = {
  sm: "size-4",
  md: "size-4",
  lg: "size-5",
  xl: "size-5",
}

const defaultItems: StyledAccordionItem[] = [
  {
    value: "item-1",
    title: "What is included?",
    content:
      "Every plan ships the full component library, semantic tokens, and lifetime updates for the tier you own.",
  },
  {
    value: "item-2",
    title: "How does installation work?",
    content:
      "Add any component with a single CLI command. Files land in your project and stay fully editable.",
  },
  {
    value: "item-3",
    title: "Can I use it in production?",
    content:
      "Yes. The system is framework agnostic, self contained, and safe to ship to any number of projects.",
  },
]

function useSingleOpen(defaultOpen?: string) {
  const [open, setOpen] = React.useState<string | null>(defaultOpen ?? null)
  const toggle = React.useCallback(
    (value: string) => setOpen((cur) => (cur === value ? null : value)),
    []
  )
  return { open, toggle }
}

const headerBase =
  "flex w-full items-center justify-between gap-3 text-left font-medium outline-none transition-colors focus-visible:ring-[3px] focus-visible:ring-ring/50"

function Panel({
  isOpen,
  size,
  children,
}: {
  isOpen: boolean
  size: StyledSize
  children: React.ReactNode
}) {
  const reduce = useReducedMotion()
  return (
    <AnimatePresence initial={false}>
      {isOpen && (
        <motion.div
          key="panel"
          initial={reduce ? false : { height: 0, opacity: 0 }}
          animate={{ height: "auto", opacity: 1 }}
          exit={{ height: 0, opacity: 0 }}
          transition={
            reduce ? { duration: 0 } : { duration: 0.25, ease: [0.4, 0, 0.2, 1] }
          }
          className="overflow-hidden"
        >
          <div className={cn(bodyPad[size], "text-muted-foreground")}>
            {children}
          </div>
        </motion.div>
      )}
    </AnimatePresence>
  )
}

function Chevron({ isOpen, size }: { isOpen: boolean; size: StyledSize }) {
  const reduce = useReducedMotion()
  return (
    <motion.span
      aria-hidden
      className="shrink-0 text-muted-foreground"
      animate={{ rotate: isOpen ? 180 : 0 }}
      transition={reduce ? { duration: 0 } : { duration: 0.2 }}
    >
      <ChevronDown className={iconSize[size]} />
    </motion.span>
  )
}

interface BarStyle {
  /* the width of the bar */
  width: string
  /* acikken satira uygulanan ek arka plan */
  openBg?: string
  /* acikken bar'a uygulanan ek his (or. glow) */
  openBar?: string
  /* origin: dikey buyume mi yoksa yatay kayma mi */
  mode: "grow" | "slide" | "fade"
}

/* Shared accent shell: an animated primary bar on the left of every row. The
   bar grows, slides or glows on open and returns on close. barStyle is each
   variant's behaviour. */
function AccentShell({
  props,
  barStyle,
}: {
  props: StyledAccordionProps
  barStyle: BarStyle
}) {
  const { className, size = "md", items = defaultItems, defaultOpen } = props
  const { open, toggle } = useSingleOpen(defaultOpen)
  const reduce = useReducedMotion()
  return (
    <div
      data-slot="styled-accordion"
      className={cn(
        "overflow-hidden rounded-xl border border-border bg-background",
        className
      )}
    >
      {items.map((item, i) => {
        const isOpen = open === item.value
        const barAnim =
          barStyle.mode === "grow"
            ? { scaleY: isOpen ? 1 : 0 }
            : barStyle.mode === "slide"
              ? { x: isOpen ? 0 : -4, opacity: isOpen ? 1 : 0 }
              : { opacity: isOpen ? 1 : 0 }
        return (
          <div
            key={item.value}
            className={cn(
              "relative transition-colors",
              i > 0 && "border-t border-border",
              isOpen && barStyle.openBg
            )}
          >
            <motion.span
              aria-hidden
              className={cn(
                "absolute left-0 top-0 bottom-0 origin-top rounded-full bg-primary",
                barStyle.width,
                isOpen && barStyle.openBar
              )}
              initial={false}
              animate={reduce ? { opacity: isOpen ? 1 : 0 } : barAnim}
              transition={
                reduce
                  ? { duration: 0 }
                  : { type: "spring" as const, stiffness: 320, damping: 30 }
              }
            />
            <button
              type="button"
              aria-expanded={isOpen}
              onClick={() => toggle(item.value)}
              className={cn(
                headerBase,
                headerPad[size],
                "hover:bg-[color-mix(in_oklab,var(--color-foreground)_5%,transparent)]"
              )}
            >
              {item.title}
              <Chevron isOpen={isOpen} size={size} />
            </button>
            <Panel isOpen={isOpen} size={size}>
              {item.content}
            </Panel>
          </div>
        )
      })}
    </div>
  )
}

/* Bar: klasik ince sol bar, acikken dikey buyur. */
export function BarAccordion(props: StyledAccordionProps) {
  return <AccentShell props={props} barStyle={{ width: "w-1", mode: "grow" }} />
}

/* Grow: a thicker bar, growing vertically when open plus a soft row fill. */
export function GrowAccordion(props: StyledAccordionProps) {
  return (
    <AccentShell
      props={props}
      barStyle={{
        width: "w-1.5",
        mode: "grow",
        openBg: "bg-[color-mix(in_oklab,var(--color-primary)_8%,transparent)]",
      }}
    />
  )
}

/* Glow: bar acikken parlar (primary tonlu golge). */
export function GlowAccordion(props: StyledAccordionProps) {
  return (
    <AccentShell
      props={props}
      barStyle={{
        width: "w-1",
        mode: "grow",
        openBar:
          "shadow-[0_0_10px_2px_color-mix(in_oklab,var(--color-primary)_55%,transparent)]",
      }}
    />
  )
}

/* Left: bar soldan kayarak girer (slide-in). */
export function LeftAccordion(props: StyledAccordionProps) {
  return <AccentShell props={props} barStyle={{ width: "w-1", mode: "slide" }} />
}

/* Full: a thick bar appearing with a fade plus a pronounced row fill. */
export function FullAccordion(props: StyledAccordionProps) {
  return (
    <AccentShell
      props={props}
      barStyle={{
        width: "w-2",
        mode: "fade",
        openBg: "bg-[color-mix(in_oklab,var(--color-primary)_12%,transparent)]",
      }}
    />
  )
}

Manual installs skip the @ai2/tokens theme, so add the token CSS from the theming guide or the tone colors will be missing.

Variations

5 takes on the same idea. Each is its own export, and every one accepts a size prop (sm, md, lg, xl) aligned to the base Button scale.

Bar

A thin primary left bar that grows vertically on open.

Grow

A thicker bar that grows with a soft row fill.

Glow

A bar that glows with a primary halo when open.

Left

A bar that slides in from the left on open.

Full

A thick bar that fades in with a defined row fill.

ai2 Accent accordions: 5 styled variations on the token system

The ai2 Accent accordions are a set of 5 decorative button variations from the styled layer of the @ai2 design system, built around collapsible sections with an animated primary left accent bar. They are free and MIT licensed, and every color comes from a semantic token, so they theme with the rest of ai2 in light and dark.

Motion runs on framer-motion: framer-motion springs the left bar and animates the panel height on open. The styled layer is opt-in, so the dependency only lands if you use it; the base components stay lean. Under reduced motion, the bar appears instantly and the panels expand and collapse with no animation.

What is in the ai2 Accent accordions?

5 exports in one file: Bar, Grow, Glow, Left and Full. Each renders a native button and takes a size prop (sm, md, lg, xl) aligned to the base Button. They are separate from the base Button on purpose: the base keeps its clean variant, tone and size axes, while the styled layer carries the effects.

You own the file. Copy the one category file and you have all 5 variations, with no runtime dependency on ai2 itself.

Why use it

On-system by construction: Every color resolves to an ai2 semantic token, so the buttons follow your theme in light and dark with no extra work.
Effect without the sprawl: The decorations live in a dedicated styled file, so the base Button keeps its clean, predictable API.
Accessible and honest: Each renders a real button element, keeps a visible focus ring, and respects prefers-reduced-motion.

Features

Token-driven color: No hardcoded hex or oklch; the look recolors with your theme tokens.
framer-motion: framer-motion springs the left bar and animates the panel height on open.
Reduced-motion aware: Under prefers-reduced-motion, the bar appears instantly and the panels expand and collapse with no animation.
Size aligned to the base: Every variation takes sm, md, lg and xl matching the base Button height scale, so styled and base buttons line up in a row.

Production tips

Use it for emphasis, not everywhere: Styled buttons draw the eye. Reserve them for the one action you want people to take on a screen, and use the base Button for the rest.
Keep labels as verbs: The decoration adds weight, so a clear action label keeps the button scannable.
Pick one variation per surface: The variations share a family; using two different ones in the same view competes for attention.

Works with the rest of ai2

The Accent accordions sit alongside the base Button and the rest of the @ai2 registry. They share the same token file, so a styled action next to a base button or a badge stays visually consistent in both modes.