diff --git a/src/components/@types/global.ts b/src/components/@types/global.ts
index 5dfd180e..8b7408d8 100644
--- a/src/components/@types/global.ts
+++ b/src/components/@types/global.ts
@@ -48,3 +48,22 @@ export interface ScrollerStep {
    */
   foregroundProps?: object;
 }
+
+export interface PhotoCarouselImage {
+  /**
+   * Image src
+   */
+  src: string;
+  /**
+   * Image alt text
+   */
+  altText: string;
+  /** Optional caption as a string */
+  caption?: string;
+  /** Optional credit as string */
+  credit?: string;
+  /** Optional object-fit rule */
+  objectFit?: string;
+  /** Optional object-position rule */
+  objectPosition?: string;
+}
diff --git a/src/components/PhotoCarousel/PhotoCarousel.mdx b/src/components/PhotoCarousel/PhotoCarousel.mdx
new file mode 100644
index 00000000..44188191
--- /dev/null
+++ b/src/components/PhotoCarousel/PhotoCarousel.mdx
@@ -0,0 +1,63 @@
+import { Meta, Canvas } from '@storybook/blocks';
+
+import * as PhotoCarouselStories from './PhotoCarousel.stories.svelte';
+
+<Meta of={PhotoCarouselStories} />
+
+# PhotoCarousel
+
+The `PhotoCarousel` component creates a simple, accessible photo carousel with lazy-loading and mobile swipe built in.
+
+```svelte
+<script>
+  import { PhotoCarousel } from '@reuters-graphics/graphics-components';
+
+  const photos = [
+    {
+      src: 'https://.../myImage.jpg',
+      altText: 'A picture of...',
+      caption: 'My caption...', // Optional
+      credit: 'REUTERS/Jane Doe', // Optional
+      objectFit: 'contain', // Optional
+      objectPosition: '50% 50%', // Optional
+    },
+    // ...
+  ];
+</script>
+
+<PhotoCarousel {photos} />
+```
+
+<Canvas of={PhotoCarouselStories.Demo} />
+
+## Custom text
+
+Use named slots to style your own custom credits and/or captions.
+
+```svelte
+<PhotoCarousel {photos}>
+  <p slot="credit" class="custom-credit" let:credit>{credit}</p>
+  <p slot="caption" class="custom-caption" let:caption>{caption}</p>
+</PhotoCarousel>
+
+<style lang="scss">
+  p {
+    position: absolute;
+    color: white;
+    background-color: rgba(0, 0, 0, 0.6);
+    font-family: sans-serif;
+    font-size: 0.8rem;
+    padding: 0 5px;
+    &.custom-credit {
+      top: 0;
+      right: 0;
+    }
+    &.custom-caption {
+      bottom: 5px;
+      left: 0;
+    }
+  }
+</style>
+```
+
+<Canvas of={PhotoCarouselStories.CustomText} />
diff --git a/src/components/PhotoCarousel/PhotoCarousel.stories.svelte b/src/components/PhotoCarousel/PhotoCarousel.stories.svelte
index 3b1bc3a0..76db1c5c 100644
--- a/src/components/PhotoCarousel/PhotoCarousel.stories.svelte
+++ b/src/components/PhotoCarousel/PhotoCarousel.stories.svelte
@@ -1,68 +1,41 @@
 <script module lang="ts">
-  // @ts-ignore raw
-  import componentDocs from './stories/docs/component.md?raw';
-  // @ts-ignore raw
-  import customDocs from './stories/docs/withCustom.md?raw';
-
+  import { defineMeta } from '@storybook/addon-svelte-csf';
   import PhotoCarousel from './PhotoCarousel.svelte';
 
-  import { withComponentDocs, withStoryDocs } from '$docs/utils/withParams.js';
-
-  export const meta = {
+  const { Story } = defineMeta({
     title: 'Components/Multimedia/PhotoCarousel',
     component: PhotoCarousel,
-    ...withComponentDocs(componentDocs),
     argTypes: {
       width: {
         control: 'select',
         options: ['normal', 'wide', 'wider', 'widest', 'fluid'],
       },
     },
-  };
+  });
 </script>
 
 <script>
-  import { Template, Story } from '@storybook/addon-svelte-csf';
-
-  import photosJson from './stories/photos.json';
+  import photosJson from './demo/photos.json';
+  // import { PhotoCarouselImage } from '../@types/global';
 
   const photos = photosJson.map((p) => ({ ...p, altText: p.caption }));
 </script>
 
-<Template >
-  {#snippet children({ args })}
-    <PhotoCarousel {...args} />
-  {/snippet}
-</Template>
-
 <Story
-  name="Default"
-  args="{{
-    width: 'wider',
+  name="Demo"
+  args={{
     photos,
-  }}"
+  }}
 />
 
-<Story
-  name="Custom credits and captions"
-  args="{{
-    width: 'wider',
-    photos,
-  }}"
-  {...withStoryDocs(customDocs)}
->
-  <PhotoCarousel
-    {...{
-      width: 'wider',
-      photos,
-    }}
-  >
-    {#snippet credit({ credit })}
-        <p class="custom-credit"  >{credit}</p>
-      {/snippet}
-    {#snippet caption({ caption })}
-        <p class="custom-caption"  >{caption}</p>
-      {/snippet}
+<Story name="Custom text" exportName="CustomText">
+  <PhotoCarousel {photos}>
+    {#snippet credit(photo)}
+      <p class="custom-credit">{photo.credit}</p>
+    {/snippet}
+    {#snippet caption(photo)}
+      <p class="custom-caption">{photo.caption}</p>
+    {/snippet}
   </PhotoCarousel>
 </Story>
 
diff --git a/src/components/PhotoCarousel/PhotoCarousel.svelte b/src/components/PhotoCarousel/PhotoCarousel.svelte
index a785c761..400970a8 100644
--- a/src/components/PhotoCarousel/PhotoCarousel.svelte
+++ b/src/components/PhotoCarousel/PhotoCarousel.svelte
@@ -1,108 +1,86 @@
-<!-- @migration-task Error while migrating Svelte code: Cannot set properties of undefined (setting 'next') -->
 <!-- @component `PhotoCarousel` [Read the docs.](https://reuters-graphics.github.io/graphics-components/?path=/docs/components-multimedia-photocarousel--docs) -->
 <script lang="ts">
-  type ContainerWidth = 'normal' | 'wide' | 'wider' | 'widest' | 'fluid';
-
-  /** Width of the component within the text well. */
-  export let width: ContainerWidth = 'wider';
-
-  /**
-   * Set a different width for captions within the text well, for example,
-   * "normal" to keep captions inline with the rest of the text well.
-   * Can't ever be wider than `width`.
-   * @type {string}
-   */
-  export let textWidth: ContainerWidth = 'normal';
-
-  /** Add an ID to target with SCSS. */
-  export let id: string = '';
-
-  /** Add a class to target with SCSS. */
-  let cls: string = '';
-  export { cls as class };
-
-  interface Image {
-    /**
-     * Image src
-     * @required
-     */
-    src: string;
-    /**
-     * Image alt-text
-     * @required
-     */
-    altText: string;
-    /** Optional caption */
-    caption?: string;
-    /** Optional credit */
-    credit?: string;
-    /** Optional object-fit rule */
-    objectFit?: string;
-    /** Optional object-position rule */
-    objectPosition?: string;
-  }
-
-  /**
-   * Array of photos.
-   * @required
-   */
-  export let photos: Image[] = [];
-
-  /**
-   * Max height of the carousel
-   */
-  export let maxHeight: number = 660;
-
-  type ObjectFit = 'cover' | 'contain';
-
-  /**
-   * Default Image object-fit style, either `cover` or `contain`.
-   */
-  export let defaultImageObjectFit: ObjectFit = 'cover';
-
-  /**
-   * Default image object-position style, e.g., `center center` or `50% 50%`.
-   */
-  export let defaultImageObjectPosition: string = 'center center';
-
-  /**
-   * ARIA label for the carousel.
-   * @required
-   */
-  export let carouselAriaLabel: string = 'Photo gallery';
-
-  /**
-   * Set height of the carousel as a ratio of its width
-   * as long as its below whatever you set in `maxHeight`.
-   */
-  export let heightRatio: number = 0.68;
-
-  /**
-   * Number of images to preload ahead of the active image.
-   */
-  export let preloadImages: number = 1;
-
-  import Block from '../Block/Block.svelte';
-  import { Splide, SplideSlide, SplideTrack } from '@splidejs/svelte-splide';
+  // Utils
   import '@splidejs/svelte-splide/css/core';
-  // @ts-ignore no types
+  import { fly } from 'svelte/transition';
+  import { Splide, SplideSlide, SplideTrack } from '@splidejs/svelte-splide';
+
+  // Icons
   import Fa from 'svelte-fa/src/fa.svelte';
   import {
     faChevronLeft,
     faChevronRight,
   } from '@fortawesome/free-solid-svg-icons';
-  import { fly } from 'svelte/transition';
+
+  // Components
+  import Block from '../Block/Block.svelte';
   import PaddingReset from '../PaddingReset/PaddingReset.svelte';
+
+  // Types
   import type { MoveEventDetail } from '@splidejs/svelte-splide/types';
+  import type { Snippet } from 'svelte';
+  import type { PhotoCarouselImage } from '../@types/global';
 
-  let containerWidth: number;
+  type ContainerWidth = 'normal' | 'wide' | 'wider' | 'widest' | 'fluid';
 
-  let activeImageIndex = 0;
+  type ObjectFit = 'cover' | 'contain';
 
-  $: carouselHeight =
+  interface Props {
+    /** Array of photos. */
+    photos: PhotoCarouselImage[];
+    /** Width of the component within the text well: normal, wide, wider, widest, fluid */
+    width?: ContainerWidth;
+    /**
+     * Set a different width for captions within the text well, e.g. "normal," to keep captions inline with the rest of the text well. Can't ever be wider than `width`.
+     */
+    textWidth?: ContainerWidth;
+    /** Add an ID to target with SCSS. */
+    id?: string;
+    /** Add a class to target with SCSS. */
+    cls?: string;
+    /** Max height of the carousel */
+    maxHeight?: number;
+    /** Default Image object-fit style: cover, contain */
+    defaultImageObjectFit?: ObjectFit;
+    /** Default image object-position style, e.g., `center center` or `50% 50%`. */
+    defaultImageObjectPosition?: string;
+    /** ARIA label for the carousel. */
+    carouselAriaLabel?: string;
+    /** Set height of the carousel as a ratio of its width as long as its below whatever you set in `maxHeight`. */
+    heightRatio?: number;
+    /** Number of images to preload ahead of the active image. */
+    preloadImages?: number;
+    /** Optional custom credit format as a snippet, which takes the argument `photo`. */
+    credit?: Snippet<[PhotoCarouselImage]>;
+    /** Optional custom caption format as a snippet, which takes the argument `photo`. */
+    caption?: Snippet<[PhotoCarouselImage]>;
+  }
+
+  let {
+    width = 'wider',
+    textWidth = 'normal',
+    id = '',
+    cls = '',
+    photos,
+    maxHeight = 660,
+    defaultImageObjectFit = 'cover',
+    defaultImageObjectPosition = 'center center',
+    carouselAriaLabel = 'Photo gallery',
+    heightRatio = 0.68,
+    preloadImages = 1,
+    credit,
+    caption,
+  }: Props = $props();
+
+  let containerWidth: number | undefined = $state(undefined);
+  let activeImageIndex = $state(0);
+
+  // Derive carousel height based on container width
+  let carouselHeight = $derived(
     containerWidth ?
       Math.min(containerWidth * heightRatio, maxHeight)
-    : maxHeight;
+    : maxHeight
+  );
 
   const handleActiveChange = (e?: CustomEvent<MoveEventDetail>) => {
     if (!e) return;
@@ -111,17 +89,17 @@
 </script>
 
 <Block {width} {id} class="photo-carousel fmy-6 {cls}">
-  <div class="carousel-container" bind:clientWidth="{containerWidth}">
+  <div class="carousel-container" bind:clientWidth={containerWidth}>
     <Splide
-      hasTrack="{false}"
-      options="{{
+      hasTrack={false}
+      options={{
         height: carouselHeight,
         fixedHeight: carouselHeight,
         lazyLoad: 'nearby',
         preloadPages: preloadImages,
-      }}"
-      aria-label="{carouselAriaLabel}"
-      on:move="{handleActiveChange}"
+      }}
+      aria-label={carouselAriaLabel}
+      on:move={handleActiveChange}
     >
       <div class="image-container">
         <SplideTrack>
@@ -134,20 +112,20 @@
                 >
                   <img
                     class="w-full h-full fmy-0"
-                    data-splide-lazy="{photo.src}"
-                    alt="{photo.altText}"
-                    style:object-fit="{photo.objectFit ||
-                      defaultImageObjectFit}"
-                    style:object-position="{photo.objectPosition ||
-                      defaultImageObjectPosition}"
+                    data-splide-lazy={photo.src}
+                    alt={photo.altText}
+                    style:object-fit={photo.objectFit || defaultImageObjectFit}
+                    style:object-position={photo.objectPosition ||
+                      defaultImageObjectPosition}
                   />
-                  {#if $$slots.credit}
-                    <slot name="credit" credit="{photo.credit}" />
-                  {:else}
+                  {#if credit}
+                    <!-- Render custom credit snippet -->
+                    {@render credit(photo)}
+                  {:else if photo.credit}
                     <span
                       class="credit absolute fmb-1 fml-1 leading-tighter font-note text-xxs"
-                      class:contain-fit="{photo.objectFit === 'contain' ||
-                        defaultImageObjectFit === 'contain'}"
+                      class:contain-fit={photo.objectFit === 'contain' ||
+                        defaultImageObjectFit === 'contain'}
                       >{photo.credit}</span
                     >
                   {/if}
@@ -158,20 +136,20 @@
         </SplideTrack>
 
         {#if photos[activeImageIndex].caption}
-          <PaddingReset containerIsFluid="{width === 'fluid'}">
-            <Block width="{textWidth}">
-              {#if $$slots.caption}
-                <slot
-                  name="caption"
-                  caption="{photos[activeImageIndex].caption}"
-                />
-              {:else}
+          {@const activePhoto = photos[activeImageIndex]}
+          <PaddingReset containerIsFluid={width === 'fluid'}>
+            <Block width={textWidth}>
+              {#if caption && activePhoto.caption}
+                {#key activeImageIndex}
+                  {@render caption(activePhoto)}
+                {/key}
+              {:else if typeof activePhoto.caption}
                 {#key activeImageIndex}
                   <p
                     class="caption body-caption text-center"
-                    in:fly|local="{{ x: 20, duration: 175 }}"
+                    in:fly|local={{ x: 20, duration: 175 }}
                   >
-                    {photos[activeImageIndex].caption}
+                    {activePhoto.caption}
                   </p>
                 {/key}
               {/if}
@@ -185,10 +163,10 @@
 
         <div class="splide__arrows fp-1">
           <button class="splide__arrow splide__arrow--prev">
-            <Fa icon="{faChevronLeft}" fw />
+            <Fa icon={faChevronLeft} fw />
           </button>
           <button class="splide__arrow splide__arrow--next">
-            <Fa icon="{faChevronRight}" fw />
+            <Fa icon={faChevronRight} fw />
           </button>
         </div>
       </div>
diff --git a/src/components/PhotoCarousel/stories/photos.json b/src/components/PhotoCarousel/demo/photos.json
similarity index 100%
rename from src/components/PhotoCarousel/stories/photos.json
rename to src/components/PhotoCarousel/demo/photos.json
diff --git a/src/components/PhotoCarousel/stories/docs/component.md b/src/components/PhotoCarousel/stories/docs/component.md
deleted file mode 100644
index c85a042f..00000000
--- a/src/components/PhotoCarousel/stories/docs/component.md
+++ /dev/null
@@ -1,21 +0,0 @@
-A simple, accessible photo carousel with lazy-loading and mobile swipe built in.
-
-```svelte
-<script>
-  import { PhotoCarousel } from '@reuters-graphics/graphics-components';
-
-  const photos = [
-    {
-      src: 'https://.../myImage.jpg',
-      altText: 'A picture of...',
-      caption: 'My caption...', // Optional
-      credit: 'REUTERS/Jane Doe', // Optional
-      objectFit: 'contain', // Optional
-      objectPosition: '50% 50%', // Optional
-    },
-    // ...
-  ];
-</script>
-
-<PhotoCarousel photos="{photos}" />
-```
diff --git a/src/components/PhotoCarousel/stories/docs/withCustom.md b/src/components/PhotoCarousel/stories/docs/withCustom.md
deleted file mode 100644
index 849ee394..00000000
--- a/src/components/PhotoCarousel/stories/docs/withCustom.md
+++ /dev/null
@@ -1,27 +0,0 @@
-Use named slots to style your own custom credits and/or captions.
-
-```svelte
-<PhotoCarousel photos="{photos}">
-  <p slot="credit" class="custom-credit" let:credit>{credit}</p>
-  <p slot="caption" class="custom-caption" let:caption>{caption}</p>
-</PhotoCarousel>
-
-<style lang="scss">
-  p {
-    position: absolute;
-    color: white;
-    background-color: rgba(0, 0, 0, 0.6);
-    font-family: sans-serif;
-    font-size: 0.8rem;
-    padding: 0 5px;
-    &.custom-credit {
-      top: 0;
-      right: 0;
-    }
-    &.custom-caption {
-      bottom: 5px;
-      left: 0;
-    }
-  }
-</style>
-```
diff --git a/src/components/PymChild/PymChild.mdx b/src/components/PymChild/PymChild.mdx
new file mode 100644
index 00000000..927d6bd3
--- /dev/null
+++ b/src/components/PymChild/PymChild.mdx
@@ -0,0 +1,36 @@
+import { Meta } from '@storybook/blocks';
+
+import * as PymChildStories from './PymChild.stories.svelte';
+
+<Meta of={PymChildStories} />
+
+# PymChild
+
+The `PymChild` component creates a [Pym.js](https://blog.apps.npr.org/pym.js/) child instance for embeddables.
+
+```svelte
+<script>
+  import { PymChild } from '@reuters-graphics/graphics-components';
+</script>
+
+<PymChild polling={500} />
+```
+
+You can access the Pym.js child via `pymChildState` in other components to send custom height updates to parent frames:
+
+```svelte
+<script>
+  import {
+    PymChild,
+    pymChildState,
+  } from '@reuters-graphics/graphics-components';
+
+  const updateHeight = () => {
+    if (pymChildState.pymChild) pymChildState.pymChild.sendHeight();
+  };
+</script>
+
+<PymChild />
+
+<button onclick={updateHeight}>Update height</button>
+```
diff --git a/src/components/PymChild/PymChild.stories.svelte b/src/components/PymChild/PymChild.stories.svelte
index 5119f692..36c1f1f3 100644
--- a/src/components/PymChild/PymChild.stories.svelte
+++ b/src/components/PymChild/PymChild.stories.svelte
@@ -1,27 +1,11 @@
 <script module lang="ts">
-  // @ts-ignore raw
-  import componentDocs from './stories/docs/component.md?raw';
-
+  import { defineMeta } from '@storybook/addon-svelte-csf';
   import PymChild from './PymChild.svelte';
 
-  import { withComponentDocs } from '$lib/docs/utils/withParams.js';
-
-  export const meta = {
+  const { Story } = defineMeta({
     title: 'Components/Utilities/PymChild',
     component: PymChild,
-    ...withComponentDocs(componentDocs),
-  };
+  });
 </script>
 
-<script>
-  import { Template, Story } from '@storybook/addon-svelte-csf';
-</script>
-
-<Template >
-  {#snippet children({ args })}
-    <PymChild {...args} />
-    <div>Nothing to see here. 😎</div>
-  {/snippet}
-</Template>
-
-<Story name="Default" />
+<Story name="Demo" tags={['!autodocs', '!dev']} />
diff --git a/src/components/PymChild/PymChild.svelte b/src/components/PymChild/PymChild.svelte
index c60f870c..f7cb9831 100644
--- a/src/components/PymChild/PymChild.svelte
+++ b/src/components/PymChild/PymChild.svelte
@@ -1,8 +1,9 @@
 <!-- @component `PymChild` [Read the docs.](https://reuters-graphics.github.io/graphics-components/?path=/docs/components-utilities-pymchild--docs) -->
 <script lang="ts">
-  import { onMount } from 'svelte';
   import pym from 'pym.js';
-  import { pymChildStore } from './stores.js';
+  import { pymChildState } from './state.svelte.js';
+  import { onMount } from 'svelte';
+
   interface Props {
     /** Pym.js polling interval */
     polling?: number;
@@ -10,10 +11,8 @@
 
   let { polling = 500 }: Props = $props();
 
-  let pymChild;
-
   onMount(() => {
-    pymChild = new pym.Child({ polling });
-    pymChildStore.set(pymChild);
+    let pymChild = new pym.Child({ polling });
+    pymChildState.pymChild = pymChild;
   });
 </script>
diff --git a/src/components/PymChild/state.svelte.ts b/src/components/PymChild/state.svelte.ts
new file mode 100644
index 00000000..3dfee824
--- /dev/null
+++ b/src/components/PymChild/state.svelte.ts
@@ -0,0 +1,5 @@
+import pym from 'pym.js';
+
+type PymChildState = { pymChild: pym.Child | null };
+
+export const pymChildState: PymChildState = $state({ pymChild: null });
diff --git a/src/components/PymChild/stores.js b/src/components/PymChild/stores.js
deleted file mode 100644
index 690e8453..00000000
--- a/src/components/PymChild/stores.js
+++ /dev/null
@@ -1,3 +0,0 @@
-import { writable } from 'svelte/store';
-
-export const pymChildStore = writable(null);
diff --git a/src/components/PymChild/stories/docs/component.md b/src/components/PymChild/stories/docs/component.md
deleted file mode 100644
index ac261b84..00000000
--- a/src/components/PymChild/stories/docs/component.md
+++ /dev/null
@@ -1,28 +0,0 @@
-A Pym.js child instance for embeddables.
-
-```svelte
-<script>
-  import { PymChild } from '@reuters-graphics/graphics-components';
-</script>
-
-<PymChild polling="{500}" />
-```
-
-You can access the Pym.js child through its store in other components to send custom height updates to parent frames:
-
-```svelte
-<script>
-  import {
-    PymChild,
-    pymChildStore,
-  } from '@reuters-graphics/graphics-components';
-
-  const updateHeight = () => {
-    if ($pymChildStore) $pymChildStore.sendHeight();
-  };
-</script>
-
-<PymChild />
-
-<button on:click="{updateHeight}">Update height</button>
-```