diff --git a/packages/ui/src/v2/IconButton/IconButton.stories.tsx b/packages/ui/src/v2/IconButton/IconButton.stories.tsx
new file mode 100644
index 000000000..ad118556a
--- /dev/null
+++ b/packages/ui/src/v2/IconButton/IconButton.stories.tsx
@@ -0,0 +1,112 @@
+// Copyright (c) 2026 Probo Inc <hello@probo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+import { GearIcon } from "@phosphor-icons/react";
+import type { Meta, StoryObj } from "@storybook/react";
+
+import { IconButton } from "./IconButton";
+import { IconButtonSkeleton } from "./IconButtonSkeleton";
+
+const sizes = [1, 2, 3, 4] as const;
+const variants = ["classic", "solid", "soft", "surface", "outline", "ghost"] as const;
+const colors = ["neutral", "gold", "red", "green", "amber", "sky"] as const;
+
+export default {
+  title: "v2/IconButton",
+  component: IconButton,
+  args: {
+    "aria-label": "Settings",
+    "children": <GearIcon />,
+    "size": 2,
+    "variant": "solid",
+    "color": "gold",
+    "highContrast": false,
+    "loading": false,
+    "disabled": false,
+  },
+} satisfies Meta<typeof IconButton>;
+
+type Story = StoryObj<typeof IconButton>;
+
+export const Playground: Story = {};
+
+export const Sizes: Story = {
+  render: () => (
+    <div className="flex items-center gap-3">
+      {sizes.map(size => (
+        <IconButton key={size} size={size} aria-label="Settings">
+          <GearIcon />
+        </IconButton>
+      ))}
+    </div>
+  ),
+};
+
+export const Variants: Story = {
+  render: () => (
+    <div className="flex items-center gap-3">
+      {variants.map(variant => (
+        <IconButton key={variant} variant={variant} aria-label="Settings">
+          <GearIcon />
+        </IconButton>
+      ))}
+    </div>
+  ),
+};
+
+export const Colors: Story = {
+  render: () => (
+    <div className="flex flex-col gap-3">
+      {variants.map(variant => (
+        <div key={variant} className="flex items-center gap-3">
+          {colors.map(color => (
+            <IconButton key={color} variant={variant} color={color} aria-label="Settings">
+              <GearIcon />
+            </IconButton>
+          ))}
+        </div>
+      ))}
+    </div>
+  ),
+};
+
+export const HighContrast: Story = {
+  render: () => (
+    <div className="flex items-center gap-3">
+      {colors.map(color => (
+        <IconButton key={color} color={color} highContrast aria-label="Settings">
+          <GearIcon />
+        </IconButton>
+      ))}
+    </div>
+  ),
+};
+
+export const States: Story = {
+  render: () => (
+    <div className="flex items-center gap-3">
+      <IconButton loading aria-label="Loading"><GearIcon /></IconButton>
+      <IconButton disabled aria-label="Settings"><GearIcon /></IconButton>
+    </div>
+  ),
+};
+
+export const Skeleton: Story = {
+  render: () => (
+    <div className="flex items-center gap-3">
+      <IconButtonSkeleton size={2} />
+      <IconButtonSkeleton size={3} />
+    </div>
+  ),
+};
diff --git a/packages/ui/src/v2/IconButton/IconButton.tsx b/packages/ui/src/v2/IconButton/IconButton.tsx
new file mode 100644
index 000000000..48ca14172
--- /dev/null
+++ b/packages/ui/src/v2/IconButton/IconButton.tsx
@@ -0,0 +1,48 @@
+// Copyright (c) 2026 Probo Inc <hello@probo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+import { SpinnerGapIcon } from "@phosphor-icons/react";
+import type { ComponentProps } from "react";
+import type { VariantProps } from "tailwind-variants/lite";
+
+import { iconButton } from "./variants";
+
+export type IconButtonProps
+  = Omit<ComponentProps<"button">, "color">
+    & VariantProps<typeof iconButton>
+    & {
+      // Shows a spinner in place of the icon and disables the button.
+      loading?: boolean;
+    };
+
+// Square, icon-only action (Radix "IconButton"). The single icon is passed as
+// children; always provide an `aria-label`. See contrib/claude/ui.md.
+export function IconButton(props: IconButtonProps) {
+  const {
+    size, variant, color, highContrast, className,
+    loading = false, disabled, type = "button", children, ...rest
+  } = props;
+
+  return (
+    <button
+      type={type}
+      disabled={disabled || loading}
+      aria-busy={loading || undefined}
+      className={iconButton({ size, variant, color, highContrast, className })}
+      {...rest}
+    >
+      {loading ? <SpinnerGapIcon className="animate-spin" aria-hidden /> : children}
+    </button>
+  );
+}
diff --git a/packages/ui/src/v2/IconButton/IconButtonSkeleton.tsx b/packages/ui/src/v2/IconButton/IconButtonSkeleton.tsx
new file mode 100644
index 000000000..d38f7d8eb
--- /dev/null
+++ b/packages/ui/src/v2/IconButton/IconButtonSkeleton.tsx
@@ -0,0 +1,28 @@
+// Copyright (c) 2026 Probo Inc <hello@probo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+import type { ComponentProps } from "react";
+import type { VariantProps } from "tailwind-variants/lite";
+
+import { iconButtonSkeleton } from "./variants";
+
+export type IconButtonSkeletonProps = Omit<ComponentProps<"span">, "children"> & VariantProps<typeof iconButtonSkeleton>;
+
+// Loading placeholder paired with IconButton: a square pulse block matching its
+// size and radius.
+export function IconButtonSkeleton(props: IconButtonSkeletonProps) {
+  const { size, className, ...rest } = props;
+
+  return <span aria-hidden className={iconButtonSkeleton({ size, className })} {...rest} />;
+}
diff --git a/packages/ui/src/v2/IconButton/variants.ts b/packages/ui/src/v2/IconButton/variants.ts
new file mode 100644
index 000000000..054d21510
--- /dev/null
+++ b/packages/ui/src/v2/IconButton/variants.ts
@@ -0,0 +1,134 @@
+// Copyright (c) 2026 Probo Inc <hello@probo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+import { tv } from "tailwind-variants/lite";
+
+// Square, icon-only sibling of Button (Radix "IconButton"). The variant × color
+// surface treatment mirrors Button's matrix; only the sizing differs (square,
+// no text padding).
+export const iconButton = tv({
+  base: [
+    "inline-flex shrink-0 items-center justify-center border border-transparent",
+    "cursor-pointer outline-none transition-colors select-none",
+    "focus-visible:ring-2 focus-visible:ring-sand-8 focus-visible:ring-offset-1 focus-visible:ring-offset-sand-1",
+    "disabled:pointer-events-none disabled:opacity-50",
+  ],
+  variants: {
+    // Corner radius is bound to size (per the Figma, radius is global/theme,
+    // not a per-instance prop).
+    size: {
+      1: "size-6 rounded-2 [&_svg]:size-4",
+      2: "size-8 rounded-2 [&_svg]:size-4",
+      3: "size-10 rounded-3 [&_svg]:size-5",
+      4: "size-12 rounded-3 [&_svg]:size-5",
+    },
+    variant: {
+      classic: "",
+      solid: "",
+      soft: "",
+      surface: "",
+      outline: "",
+      ghost: "",
+    },
+    color: {
+      neutral: "",
+      gold: "",
+      red: "",
+      green: "",
+      amber: "",
+      sky: "",
+    },
+    highContrast: {
+      true: "",
+      false: "",
+    },
+  },
+  compoundVariants: [
+    // solid / classic
+    { variant: ["solid", "classic"], color: "neutral", class: "bg-sand-9 text-white hover:bg-sand-10" },
+    { variant: ["solid", "classic"], color: "gold", class: "bg-gold-9 text-white hover:bg-gold-10" },
+    { variant: ["solid", "classic"], color: "red", class: "bg-red-9 text-white hover:bg-red-10" },
+    { variant: ["solid", "classic"], color: "green", class: "bg-green-9 text-white hover:bg-green-10" },
+    { variant: ["solid", "classic"], color: "amber", class: "bg-amber-9 text-amber-12 hover:bg-amber-10" },
+    { variant: ["solid", "classic"], color: "sky", class: "bg-sky-9 text-sky-12 hover:bg-sky-10" },
+    { variant: "classic", class: "shadow-2" },
+    { variant: ["solid", "classic"], color: "neutral", highContrast: true, class: "bg-sand-12 text-sand-1 hover:bg-sand-12" },
+    { variant: ["solid", "classic"], color: "gold", highContrast: true, class: "bg-gold-12 text-gold-1 hover:bg-gold-12" },
+    { variant: ["solid", "classic"], color: "red", highContrast: true, class: "bg-red-12 text-red-1 hover:bg-red-12" },
+    { variant: ["solid", "classic"], color: "green", highContrast: true, class: "bg-green-12 text-green-1 hover:bg-green-12" },
+    { variant: ["solid", "classic"], color: "amber", highContrast: true, class: "bg-amber-12 text-amber-1 hover:bg-amber-12" },
+    { variant: ["solid", "classic"], color: "sky", highContrast: true, class: "bg-sky-12 text-sky-1 hover:bg-sky-12" },
+
+    // soft
+    { variant: "soft", color: "neutral", class: "bg-sand-3 text-sand-11 hover:bg-sand-4" },
+    { variant: "soft", color: "gold", class: "bg-gold-3 text-gold-11 hover:bg-gold-4" },
+    { variant: "soft", color: "red", class: "bg-red-3 text-red-11 hover:bg-red-4" },
+    { variant: "soft", color: "green", class: "bg-green-3 text-green-11 hover:bg-green-4" },
+    { variant: "soft", color: "amber", class: "bg-amber-3 text-amber-11 hover:bg-amber-4" },
+    { variant: "soft", color: "sky", class: "bg-sky-3 text-sky-11 hover:bg-sky-4" },
+
+    // surface
+    { variant: "surface", color: "neutral", class: "bg-sand-2 text-sand-11 border-sand-6 hover:bg-sand-3" },
+    { variant: "surface", color: "gold", class: "bg-gold-2 text-gold-11 border-gold-6 hover:bg-gold-3" },
+    { variant: "surface", color: "red", class: "bg-red-2 text-red-11 border-red-6 hover:bg-red-3" },
+    { variant: "surface", color: "green", class: "bg-green-2 text-green-11 border-green-6 hover:bg-green-3" },
+    { variant: "surface", color: "amber", class: "bg-amber-2 text-amber-11 border-amber-6 hover:bg-amber-3" },
+    { variant: "surface", color: "sky", class: "bg-sky-2 text-sky-11 border-sky-6 hover:bg-sky-3" },
+
+    // outline
+    { variant: "outline", color: "neutral", class: "text-sand-11 border-sand-7 hover:bg-sand-3" },
+    { variant: "outline", color: "gold", class: "text-gold-11 border-gold-7 hover:bg-gold-3" },
+    { variant: "outline", color: "red", class: "text-red-11 border-red-7 hover:bg-red-3" },
+    { variant: "outline", color: "green", class: "text-green-11 border-green-7 hover:bg-green-3" },
+    { variant: "outline", color: "amber", class: "text-amber-11 border-amber-7 hover:bg-amber-3" },
+    { variant: "outline", color: "sky", class: "text-sky-11 border-sky-7 hover:bg-sky-3" },
+
+    // ghost
+    { variant: "ghost", color: "neutral", class: "text-sand-11 hover:bg-sand-3" },
+    { variant: "ghost", color: "gold", class: "text-gold-11 hover:bg-gold-3" },
+    { variant: "ghost", color: "red", class: "text-red-11 hover:bg-red-3" },
+    { variant: "ghost", color: "green", class: "text-green-11 hover:bg-green-3" },
+    { variant: "ghost", color: "amber", class: "text-amber-11 hover:bg-amber-3" },
+    { variant: "ghost", color: "sky", class: "text-sky-11 hover:bg-sky-3" },
+
+    // high-contrast text for the tinted variants
+    { variant: ["soft", "surface", "outline", "ghost"], color: "neutral", highContrast: true, class: "text-sand-12" },
+    { variant: ["soft", "surface", "outline", "ghost"], color: "gold", highContrast: true, class: "text-gold-12" },
+    { variant: ["soft", "surface", "outline", "ghost"], color: "red", highContrast: true, class: "text-red-12" },
+    { variant: ["soft", "surface", "outline", "ghost"], color: "green", highContrast: true, class: "text-green-12" },
+    { variant: ["soft", "surface", "outline", "ghost"], color: "amber", highContrast: true, class: "text-amber-12" },
+    { variant: ["soft", "surface", "outline", "ghost"], color: "sky", highContrast: true, class: "text-sky-12" },
+  ],
+  defaultVariants: {
+    size: 2,
+    variant: "solid",
+    color: "gold",
+    highContrast: false,
+  },
+});
+
+export const iconButtonSkeleton = tv({
+  base: "inline-block shrink-0 animate-pulse bg-sand-3 align-middle",
+  variants: {
+    size: {
+      1: "size-6 rounded-2",
+      2: "size-8 rounded-2",
+      3: "size-10 rounded-3",
+      4: "size-12 rounded-3",
+    },
+  },
+  defaultVariants: {
+    size: 2,
+  },
+});