From 777ee741d0cfe0caf7855125b8c780a5d7a5a600 Mon Sep 17 00:00:00 2001
From: waleed <walif6@gmail.com>
Date: Mon, 29 Jun 2026 00:39:19 -0700
Subject: [PATCH] feat(workflow-renderer): extract edge, subflow, and note
 Views into @sim/workflow-renderer

Adds a @sim/workflow-renderer package with pure, props-driven WorkflowEdgeView, SubflowNodeView, and NoteBlockView shared by the editor and (future) docs preview. Moves block-dimensions constants into the package. Each editor node becomes a thin Container that wires stores/permissions and injects the editor-only ActionBar via a slot. No optimizePackageImports for the workspace component packages (avoids the toast-style module duplication); Tailwind scans the package source.
---
 .../components/note-block/note-block.tsx      | 502 +----------------
 .../[workflowId]/components/subflows/index.ts |   5 +-
 .../components/subflows/subflow-node.tsx      | 254 +--------
 .../workflow-block/workflow-block.tsx         |   2 +-
 .../workflow-edge/workflow-edge.tsx           | 130 +----
 .../[workflowId]/hooks/use-node-utilities.ts  |   2 +-
 .../[workflowId]/utils/node-position-utils.ts |   2 +-
 .../utils/workflow-canvas-helpers.ts          |   2 +-
 .../[workspaceId]/w/[workflowId]/workflow.tsx |   4 +-
 .../components/block/block.tsx                |   2 +-
 .../components/subflow/subflow.tsx            |   2 +-
 .../preview-workflow/preview-workflow.tsx     |   2 +-
 apps/sim/hooks/use-canvas-viewport.ts         |   2 +-
 .../sim/lib/workflows/autolayout/constants.ts |   2 +-
 .../lib/workflows/autolayout/containers.ts    |   2 +-
 apps/sim/lib/workflows/autolayout/core.ts     |   2 +-
 apps/sim/lib/workflows/autolayout/targeted.ts |   2 +-
 apps/sim/lib/workflows/autolayout/utils.ts    |   2 +-
 .../blocks/deterministic-dimensions.ts        |   2 +-
 apps/sim/next.config.ts                       |   1 +
 apps/sim/package.json                         |   1 +
 apps/sim/tailwind.config.ts                   |   1 +
 bun.lock                                      |  24 +
 packages/workflow-renderer/package.json       |  45 ++
 .../workflow-renderer/src/css-modules.d.ts    |   9 +
 .../workflow-renderer/src/dimensions.ts       |   0
 .../src/edge/workflow-edge-view.tsx           | 134 +++++
 packages/workflow-renderer/src/index.ts       |   9 +
 .../src/note/note-block-view.tsx              | 517 ++++++++++++++++++
 .../src/subflow/subflow-node-view.tsx         | 264 +++++++++
 packages/workflow-renderer/src/types.ts       |  19 +
 packages/workflow-renderer/tsconfig.json      |   9 +
 32 files changed, 1113 insertions(+), 843 deletions(-)
 create mode 100644 packages/workflow-renderer/package.json
 create mode 100644 packages/workflow-renderer/src/css-modules.d.ts
 rename apps/sim/lib/workflows/blocks/block-dimensions.ts => packages/workflow-renderer/src/dimensions.ts (100%)
 create mode 100644 packages/workflow-renderer/src/edge/workflow-edge-view.tsx
 create mode 100644 packages/workflow-renderer/src/index.ts
 create mode 100644 packages/workflow-renderer/src/note/note-block-view.tsx
 create mode 100644 packages/workflow-renderer/src/subflow/subflow-node-view.tsx
 create mode 100644 packages/workflow-renderer/src/types.ts
 create mode 100644 packages/workflow-renderer/tsconfig.json

diff --git a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/note-block/note-block.tsx b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/note-block/note-block.tsx
index b8550484950..38130ca0903 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/note-block/note-block.tsx
+++ b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/note-block/note-block.tsx
@@ -1,10 +1,6 @@
 import { memo, useCallback, useMemo } from 'react'
+import { BLOCK_DIMENSIONS, NoteBlockView } from '@sim/workflow-renderer'
 import type { NodeProps } from 'reactflow'
-import remarkBreaks from 'remark-breaks'
-import { Streamdown } from 'streamdown'
-import 'streamdown/styles.css'
-import { cn, handleKeyboardActivation } from '@sim/emcn'
-import { BLOCK_DIMENSIONS } from '@/lib/workflows/blocks/block-dimensions'
 import { useUserPermissionsContext } from '@/app/workspace/[workspaceId]/providers/workspace-permissions-provider'
 import { ActionBar } from '@/app/workspace/[workspaceId]/w/[workflowId]/components/action-bar/action-bar'
 import { useBlockVisual } from '@/app/workspace/[workspaceId]/w/[workflowId]/hooks'
@@ -14,9 +10,7 @@ import type { WorkflowBlockProps } from '../workflow-block/types'
 
 interface NoteBlockNodeData extends WorkflowBlockProps {}
 
-/**
- * Extract string value from subblock value object or primitive
- */
+/** Extracts the string content from a raw subblock value (string or `{ value }`). */
 function extractFieldValue(rawValue: unknown): string | undefined {
   if (typeof rawValue === 'string') return rawValue
   if (rawValue && typeof rawValue === 'object' && 'value' in rawValue) {
@@ -26,441 +20,14 @@ function extractFieldValue(rawValue: unknown): string | undefined {
   return undefined
 }
 
-type EmbedInfo = {
-  url: string
-  type: 'iframe' | 'video' | 'audio'
-  aspectRatio?: string
-}
-
-const EMBED_SCALE = 0.78
-const EMBED_INVERSE_SCALE = `${(1 / EMBED_SCALE) * 100}%`
-
-function getTwitchParent(): string {
-  return typeof window !== 'undefined' ? window.location.hostname : 'localhost'
-}
-
 /**
- * Get embed info for supported media platforms
+ * Editor container for {@link NoteBlockView}.
+ *
+ * Resolves the note's markdown content from its subblock value, the enabled/ring
+ * visual state from {@link useBlockVisual}, and edit permission, then publishes
+ * deterministic dimensions and renders the pure view shared with the docs
+ * preview — injecting the editor-only {@link ActionBar} via the `actionBar` slot.
  */
-function getEmbedInfo(url: string): EmbedInfo | null {
-  const youtubeMatch = url.match(
-    /(?:youtube\.com\/watch\?(?:.*&)?v=|youtu\.be\/|youtube\.com\/embed\/)([a-zA-Z0-9_-]{11})/
-  )
-  if (youtubeMatch) {
-    return { url: `https://www.youtube.com/embed/${youtubeMatch[1]}`, type: 'iframe' }
-  }
-
-  const vimeoMatch = url.match(/vimeo\.com\/(\d+)/)
-  if (vimeoMatch) {
-    return { url: `https://player.vimeo.com/video/${vimeoMatch[1]}`, type: 'iframe' }
-  }
-
-  const dailymotionMatch = url.match(/dailymotion\.com\/video\/([a-zA-Z0-9]+)/)
-  if (dailymotionMatch) {
-    return { url: `https://www.dailymotion.com/embed/video/${dailymotionMatch[1]}`, type: 'iframe' }
-  }
-
-  const twitchVideoMatch = url.match(/twitch\.tv\/videos\/(\d+)/)
-  if (twitchVideoMatch) {
-    return {
-      url: `https://player.twitch.tv/?video=${twitchVideoMatch[1]}&parent=${getTwitchParent()}`,
-      type: 'iframe',
-    }
-  }
-
-  const twitchChannelMatch = url.match(/twitch\.tv\/([a-zA-Z0-9_]+)(?:\/|$)/)
-  if (twitchChannelMatch && !url.includes('/videos/') && !url.includes('/clip/')) {
-    return {
-      url: `https://player.twitch.tv/?channel=${twitchChannelMatch[1]}&parent=${getTwitchParent()}`,
-      type: 'iframe',
-    }
-  }
-
-  const streamableMatch = url.match(/streamable\.com\/([a-zA-Z0-9]+)/)
-  if (streamableMatch) {
-    return { url: `https://streamable.com/e/${streamableMatch[1]}`, type: 'iframe' }
-  }
-
-  const wistiaMatch = url.match(/(?:wistia\.com|wistia\.net)\/(?:medias|embed)\/([a-zA-Z0-9]+)/)
-  if (wistiaMatch) {
-    return { url: `https://fast.wistia.net/embed/iframe/${wistiaMatch[1]}`, type: 'iframe' }
-  }
-
-  const tiktokMatch = url.match(/tiktok\.com\/@[^/]+\/video\/(\d+)/)
-  if (tiktokMatch) {
-    return {
-      url: `https://www.tiktok.com/embed/v2/${tiktokMatch[1]}`,
-      type: 'iframe',
-      aspectRatio: '9/16',
-    }
-  }
-
-  const soundcloudMatch = url.match(/soundcloud\.com\/([a-zA-Z0-9_-]+\/[a-zA-Z0-9_-]+)/)
-  if (soundcloudMatch) {
-    return {
-      url: `https://w.soundcloud.com/player/?url=${encodeURIComponent(url)}&color=%23ff5500&auto_play=false&hide_related=true&show_comments=false&show_user=true&show_reposts=false&show_teaser=false`,
-      type: 'iframe',
-      aspectRatio: '3/2',
-    }
-  }
-
-  const spotifyTrackMatch = url.match(/open\.spotify\.com\/track\/([a-zA-Z0-9]+)/)
-  if (spotifyTrackMatch) {
-    return {
-      url: `https://open.spotify.com/embed/track/${spotifyTrackMatch[1]}`,
-      type: 'iframe',
-      aspectRatio: '3.7/1',
-    }
-  }
-
-  const spotifyAlbumMatch = url.match(/open\.spotify\.com\/album\/([a-zA-Z0-9]+)/)
-  if (spotifyAlbumMatch) {
-    return {
-      url: `https://open.spotify.com/embed/album/${spotifyAlbumMatch[1]}`,
-      type: 'iframe',
-      aspectRatio: '2/3',
-    }
-  }
-
-  const spotifyPlaylistMatch = url.match(/open\.spotify\.com\/playlist\/([a-zA-Z0-9]+)/)
-  if (spotifyPlaylistMatch) {
-    return {
-      url: `https://open.spotify.com/embed/playlist/${spotifyPlaylistMatch[1]}`,
-      type: 'iframe',
-      aspectRatio: '2/3',
-    }
-  }
-
-  const spotifyEpisodeMatch = url.match(/open\.spotify\.com\/episode\/([a-zA-Z0-9]+)/)
-  if (spotifyEpisodeMatch) {
-    return {
-      url: `https://open.spotify.com/embed/episode/${spotifyEpisodeMatch[1]}`,
-      type: 'iframe',
-      aspectRatio: '2.5/1',
-    }
-  }
-
-  const spotifyShowMatch = url.match(/open\.spotify\.com\/show\/([a-zA-Z0-9]+)/)
-  if (spotifyShowMatch) {
-    return {
-      url: `https://open.spotify.com/embed/show/${spotifyShowMatch[1]}`,
-      type: 'iframe',
-      aspectRatio: '3.7/1',
-    }
-  }
-
-  const appleMusicSongMatch = url.match(/music\.apple\.com\/([a-z]{2})\/song\/[^/]+\/(\d+)/)
-  if (appleMusicSongMatch) {
-    const [, country, songId] = appleMusicSongMatch
-    return {
-      url: `https://embed.music.apple.com/${country}/song/${songId}`,
-      type: 'iframe',
-      aspectRatio: '3/2',
-    }
-  }
-
-  const appleMusicAlbumMatch = url.match(/music\.apple\.com\/([a-z]{2})\/album\/(?:[^/]+\/)?(\d+)/)
-  if (appleMusicAlbumMatch) {
-    const [, country, albumId] = appleMusicAlbumMatch
-    return {
-      url: `https://embed.music.apple.com/${country}/album/${albumId}`,
-      type: 'iframe',
-      aspectRatio: '2/3',
-    }
-  }
-
-  const appleMusicPlaylistMatch = url.match(
-    /music\.apple\.com\/([a-z]{2})\/playlist\/[^/]+\/(pl\.[a-zA-Z0-9]+)/
-  )
-  if (appleMusicPlaylistMatch) {
-    const [, country, playlistId] = appleMusicPlaylistMatch
-    return {
-      url: `https://embed.music.apple.com/${country}/playlist/${playlistId}`,
-      type: 'iframe',
-      aspectRatio: '2/3',
-    }
-  }
-
-  const loomMatch = url.match(/loom\.com\/share\/([a-zA-Z0-9]+)/)
-  if (loomMatch) {
-    return { url: `https://www.loom.com/embed/${loomMatch[1]}`, type: 'iframe' }
-  }
-
-  const facebookVideoMatch =
-    url.match(/facebook\.com\/.*\/videos\/(\d+)/) || url.match(/fb\.watch\/([a-zA-Z0-9_-]+)/)
-  if (facebookVideoMatch) {
-    return {
-      url: `https://www.facebook.com/plugins/video.php?href=${encodeURIComponent(url)}&show_text=false`,
-      type: 'iframe',
-    }
-  }
-
-  const instagramReelMatch = url.match(/instagram\.com\/reel\/([a-zA-Z0-9_-]+)/)
-  if (instagramReelMatch) {
-    return {
-      url: `https://www.instagram.com/reel/${instagramReelMatch[1]}/embed`,
-      type: 'iframe',
-      aspectRatio: '9/16',
-    }
-  }
-
-  const instagramPostMatch = url.match(/instagram\.com\/p\/([a-zA-Z0-9_-]+)/)
-  if (instagramPostMatch) {
-    return {
-      url: `https://www.instagram.com/p/${instagramPostMatch[1]}/embed`,
-      type: 'iframe',
-      aspectRatio: '4/5',
-    }
-  }
-
-  const twitterMatch = url.match(/(?:twitter\.com|x\.com)\/[^/]+\/status\/(\d+)/)
-  if (twitterMatch) {
-    return {
-      url: `https://platform.twitter.com/embed/Tweet.html?id=${twitterMatch[1]}`,
-      type: 'iframe',
-      aspectRatio: '3/4',
-    }
-  }
-
-  const rumbleMatch =
-    url.match(/rumble\.com\/embed\/([a-zA-Z0-9]+)/) || url.match(/rumble\.com\/([a-zA-Z0-9]+)-/)
-  if (rumbleMatch) {
-    return { url: `https://rumble.com/embed/${rumbleMatch[1]}/`, type: 'iframe' }
-  }
-
-  const bilibiliMatch = url.match(/bilibili\.com\/video\/(BV[a-zA-Z0-9]+)/)
-  if (bilibiliMatch) {
-    return {
-      url: `https://player.bilibili.com/player.html?bvid=${bilibiliMatch[1]}&high_quality=1`,
-      type: 'iframe',
-    }
-  }
-
-  const vidyardMatch = url.match(/(?:vidyard\.com|share\.vidyard\.com)\/watch\/([a-zA-Z0-9]+)/)
-  if (vidyardMatch) {
-    return { url: `https://play.vidyard.com/${vidyardMatch[1]}`, type: 'iframe' }
-  }
-
-  const cfStreamMatch =
-    url.match(/cloudflarestream\.com\/([a-zA-Z0-9]+)/) ||
-    url.match(/videodelivery\.net\/([a-zA-Z0-9]+)/)
-  if (cfStreamMatch) {
-    return { url: `https://iframe.cloudflarestream.com/${cfStreamMatch[1]}`, type: 'iframe' }
-  }
-
-  const twitchClipMatch =
-    url.match(/clips\.twitch\.tv\/([a-zA-Z0-9_-]+)/) ||
-    url.match(/twitch\.tv\/[^/]+\/clip\/([a-zA-Z0-9_-]+)/)
-  if (twitchClipMatch) {
-    return {
-      url: `https://clips.twitch.tv/embed?clip=${twitchClipMatch[1]}&parent=${getTwitchParent()}`,
-      type: 'iframe',
-    }
-  }
-
-  const mixcloudMatch = url.match(/mixcloud\.com\/([^/]+\/[^/]+)/)
-  if (mixcloudMatch) {
-    return {
-      url: `https://www.mixcloud.com/widget/iframe/?feed=%2F${encodeURIComponent(mixcloudMatch[1])}%2F&hide_cover=1`,
-      type: 'iframe',
-      aspectRatio: '2/1',
-    }
-  }
-
-  const googleDriveMatch = url.match(/drive\.google\.com\/file\/d\/([a-zA-Z0-9_-]+)/)
-  if (googleDriveMatch) {
-    return { url: `https://drive.google.com/file/d/${googleDriveMatch[1]}/preview`, type: 'iframe' }
-  }
-
-  if (url.includes('dropbox.com') && /\.(mp4|mov|webm)/.test(url)) {
-    const directUrl = url
-      .replace('www.dropbox.com', 'dl.dropboxusercontent.com')
-      .replace('?dl=0', '')
-    return { url: directUrl, type: 'video' }
-  }
-
-  const tenorMatch = url.match(/tenor\.com\/view\/[^/]+-(\d+)/)
-  if (tenorMatch) {
-    return { url: `https://tenor.com/embed/${tenorMatch[1]}`, type: 'iframe', aspectRatio: '1/1' }
-  }
-
-  const giphyMatch = url.match(/giphy\.com\/(?:gifs|embed)\/(?:.*-)?([a-zA-Z0-9]+)/)
-  if (giphyMatch) {
-    return { url: `https://giphy.com/embed/${giphyMatch[1]}`, type: 'iframe', aspectRatio: '1/1' }
-  }
-
-  if (/\.(mp4|webm|ogg|mov)(\?|$)/i.test(url)) {
-    return { url, type: 'video' }
-  }
-
-  if (/\.(mp3|wav|m4a|aac)(\?|$)/i.test(url)) {
-    return { url, type: 'audio' }
-  }
-
-  return null
-}
-
-/**
- * Compact markdown renderer for note blocks with tight spacing
- */
-const NOTE_REMARK_PLUGINS = [remarkBreaks]
-
-const NOTE_COMPONENTS = {
-  p: ({ children }: { children?: React.ReactNode }) => (
-    <p className='mb-1 break-words text-[var(--text-primary)] text-sm leading-[1.25rem] last:mb-0'>
-      {children}
-    </p>
-  ),
-  h1: ({ children }: { children?: React.ReactNode }) => (
-    <h1 className='mt-3 mb-3 break-words font-semibold text-[var(--text-primary)] text-lg first:mt-0'>
-      {children}
-    </h1>
-  ),
-  h2: ({ children }: { children?: React.ReactNode }) => (
-    <h2 className='mt-2.5 mb-2.5 break-words font-semibold text-[var(--text-primary)] text-base first:mt-0'>
-      {children}
-    </h2>
-  ),
-  h3: ({ children }: { children?: React.ReactNode }) => (
-    <h3 className='mt-2 mb-2 break-words font-semibold text-[var(--text-primary)] text-sm first:mt-0'>
-      {children}
-    </h3>
-  ),
-  h4: ({ children }: { children?: React.ReactNode }) => (
-    <h4 className='mt-2 mb-2 break-words font-semibold text-[var(--text-primary)] text-xs first:mt-0'>
-      {children}
-    </h4>
-  ),
-  ul: ({ children }: { children?: React.ReactNode }) => (
-    <ul className='mt-1 mb-1 list-disc space-y-1 break-words pl-6 text-[var(--text-primary)] text-sm'>
-      {children}
-    </ul>
-  ),
-  ol: ({ children }: { children?: React.ReactNode }) => (
-    <ol className='mt-1 mb-1 list-decimal space-y-1 break-words pl-6 text-[var(--text-primary)] text-sm'>
-      {children}
-    </ol>
-  ),
-  li: ({ children }: { children?: React.ReactNode }) => <li className='break-words'>{children}</li>,
-  inlineCode: ({ children }: { children?: React.ReactNode }) => (
-    <code className='whitespace-normal rounded bg-[var(--surface-5)] px-1 py-0.5 font-mono text-[var(--caution)] text-xs'>
-      {children}
-    </code>
-  ),
-  code: ({ children, className, ...props }: { children?: React.ReactNode; className?: string }) => (
-    <code
-      {...props}
-      className='block whitespace-pre-wrap break-words rounded bg-[var(--surface-5)] p-2 text-[var(--text-primary)] text-xs'
-    >
-      {children}
-    </code>
-  ),
-  a: ({ href, children }: { href?: string; children?: React.ReactNode }) => {
-    const embedInfo = href ? getEmbedInfo(href) : null
-    if (embedInfo) {
-      return (
-        <span className='my-2 block w-full'>
-          <a
-            href={href}
-            target='_blank'
-            rel='noopener noreferrer'
-            className='mb-1 block break-all text-[var(--brand-secondary)] underline-offset-2 hover-hover:underline'
-          >
-            {children}
-          </a>
-          <span className='block w-full overflow-hidden rounded-md'>
-            {embedInfo.type === 'iframe' && (
-              <span
-                className='block overflow-hidden'
-                style={{
-                  width: '100%',
-                  aspectRatio: embedInfo.aspectRatio || '16/9',
-                }}
-              >
-                <iframe
-                  src={embedInfo.url}
-                  title='Media'
-                  allow='accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share'
-                  allowFullScreen
-                  loading='lazy'
-                  className='origin-top-left'
-                  style={{
-                    width: EMBED_INVERSE_SCALE,
-                    height: EMBED_INVERSE_SCALE,
-                    transform: `scale(${EMBED_SCALE})`,
-                  }}
-                />
-              </span>
-            )}
-            {embedInfo.type === 'video' && (
-              <video
-                src={embedInfo.url}
-                controls
-                preload='metadata'
-                className='aspect-video w-full'
-              >
-                <track kind='captions' src='' default />
-              </video>
-            )}
-            {embedInfo.type === 'audio' && (
-              <audio src={embedInfo.url} controls preload='metadata' className='w-full'>
-                <track kind='captions' src='' default />
-              </audio>
-            )}
-          </span>
-        </span>
-      )
-    }
-    return (
-      <a
-        href={href}
-        target='_blank'
-        rel='noopener noreferrer'
-        className='break-all text-[var(--brand-secondary)] underline-offset-2 hover-hover:underline'
-      >
-        {children}
-      </a>
-    )
-  },
-  strong: ({ children }: { children?: React.ReactNode }) => (
-    <strong className='break-words font-semibold text-[var(--text-primary)]'>{children}</strong>
-  ),
-  em: ({ children }: { children?: React.ReactNode }) => (
-    <em className='break-words text-[var(--text-tertiary)]'>{children}</em>
-  ),
-  blockquote: ({ children }: { children?: React.ReactNode }) => (
-    <blockquote className='my-4 break-words border-[var(--divider)] border-l-2 pl-4 text-[var(--text-primary)] italic [&>p:first-child]:mt-0 [&>p:last-child]:mb-0 [&>p]:my-2'>
-      {children}
-    </blockquote>
-  ),
-  table: ({ children }: { children?: React.ReactNode }) => (
-    <div className='my-2 max-w-full overflow-x-auto'>
-      <table className='w-full border-collapse text-xs'>{children}</table>
-    </div>
-  ),
-  thead: ({ children }: { children?: React.ReactNode }) => (
-    <thead className='border-[var(--border)] border-b'>{children}</thead>
-  ),
-  tbody: ({ children }: { children?: React.ReactNode }) => <tbody>{children}</tbody>,
-  tr: ({ children }: { children?: React.ReactNode }) => (
-    <tr className='border-[var(--border)] border-b last:border-b-0'>{children}</tr>
-  ),
-  th: ({ children }: { children?: React.ReactNode }) => (
-    <th className='px-2 py-1 text-left font-semibold text-[var(--text-primary)]'>{children}</th>
-  ),
-  td: ({ children }: { children?: React.ReactNode }) => (
-    <td className='px-2 py-1 text-[var(--text-secondary)]'>{children}</td>
-  ),
-}
-
-const NoteMarkdown = memo(function NoteMarkdown({ content }: { content: string }) {
-  return (
-    <Streamdown mode='static' remarkPlugins={NOTE_REMARK_PLUGINS} components={NOTE_COMPONENTS}>
-      {content}
-    </Streamdown>
-  )
-})
-
 export const NoteBlock = memo(function NoteBlock({
   id,
   data,
@@ -498,8 +65,8 @@ export const NoteBlock = memo(function NoteBlock({
   const canEditWorkflow = userPermissions.canEdit && !data.isWorkflowLocked
 
   /**
-   * Calculate deterministic dimensions based on content structure.
-   * Uses fixed width and computed height to avoid ResizeObserver jitter.
+   * Calculate deterministic dimensions based on content structure. Uses fixed
+   * width and computed height to avoid ResizeObserver jitter.
    */
   useBlockDimensions({
     blockId: id,
@@ -516,45 +83,14 @@ export const NoteBlock = memo(function NoteBlock({
   })
 
   return (
-    <div className='group relative'>
-      <div
-        role='button'
-        tabIndex={0}
-        className={cn(
-          'note-drag-handle relative z-[20] w-[250px] cursor-grab select-none rounded-lg border border-[var(--border)] bg-[var(--surface-2)] [&:active]:cursor-grabbing'
-        )}
-        onClick={handleClick}
-        onKeyDown={(event) => handleKeyboardActivation(event, handleClick)}
-      >
-        <ActionBar blockId={id} blockType={type} disabled={!canEditWorkflow} />
-
-        <div className='flex items-center justify-between border-[var(--divider)] border-b p-2'>
-          <div className='flex min-w-0 flex-1 items-center'>
-            <span
-              className={cn(
-                'truncate font-medium text-md',
-                !isEnabled && 'text-[var(--text-muted)]'
-              )}
-              title={name}
-            >
-              {name}
-            </span>
-          </div>
-        </div>
-
-        <div className='relative overflow-hidden p-2'>
-          <div className='relative max-w-full break-all'>
-            {isEmpty ? (
-              <p className='text-[var(--text-placeholder)] text-sm'>Add note…</p>
-            ) : (
-              <NoteMarkdown content={content} />
-            )}
-          </div>
-        </div>
-        {hasRing && (
-          <div className={cn('pointer-events-none absolute inset-0 z-40 rounded-lg', ringStyles)} />
-        )}
-      </div>
-    </div>
+    <NoteBlockView
+      name={name}
+      content={content}
+      isEnabled={isEnabled}
+      hasRing={hasRing}
+      ringStyles={ringStyles}
+      onSelect={handleClick}
+      actionBar={<ActionBar blockId={id} blockType={type} disabled={!canEditWorkflow} />}
+    />
   )
 })
diff --git a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/subflows/index.ts b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/subflows/index.ts
index 426ef81dd9a..6001d27c0d2 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/subflows/index.ts
+++ b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/subflows/index.ts
@@ -1,6 +1,3 @@
 export { LoopTool } from '@/app/workspace/[workspaceId]/w/[workflowId]/components/subflows/loop'
 export { ParallelTool } from '@/app/workspace/[workspaceId]/w/[workflowId]/components/subflows/parallel'
-export {
-  SubflowNodeComponent,
-  type SubflowNodeData,
-} from '@/app/workspace/[workspaceId]/w/[workflowId]/components/subflows/subflow-node'
+export { SubflowNodeComponent } from '@/app/workspace/[workspaceId]/w/[workflowId]/components/subflows/subflow-node'
diff --git a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/subflows/subflow-node.tsx b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/subflows/subflow-node.tsx
index 54b6a563c2a..efdb4153e8f 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/subflows/subflow-node.tsx
+++ b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/subflows/subflow-node.tsx
@@ -1,9 +1,7 @@
 import { memo, useMemo } from 'react'
-import { Badge, cn, handleKeyboardActivation } from '@sim/emcn'
-import { RepeatIcon, SplitIcon } from 'lucide-react'
-import { Handle, type NodeProps, Position, useReactFlow } from 'reactflow'
-import { HANDLE_POSITIONS } from '@/lib/workflows/blocks/block-dimensions'
-import { type DiffStatus, hasDiffStatus } from '@/lib/workflows/diff/types'
+import { type SubflowNodeData, SubflowNodeView } from '@sim/workflow-renderer'
+import { type NodeProps, useReactFlow } from 'reactflow'
+import { hasDiffStatus } from '@/lib/workflows/diff/types'
 import { useUserPermissionsContext } from '@/app/workspace/[workspaceId]/providers/workspace-permissions-provider'
 import { ActionBar } from '@/app/workspace/[workspaceId]/w/[workflowId]/components/action-bar/action-bar'
 import { useCurrentWorkflow } from '@/app/workspace/[workspaceId]/w/[workflowId]/hooks'
@@ -11,53 +9,12 @@ import { useLastRunPath } from '@/stores/execution'
 import { usePanelEditorStore } from '@/stores/panel'
 
 /**
- * Data structure for subflow nodes (loop and parallel containers)
- */
-export interface SubflowNodeData {
-  width?: number
-  height?: number
-  parentId?: string
-  extent?: 'parent'
-  isPreview?: boolean
-  /** Whether this subflow is selected in preview mode */
-  isPreviewSelected?: boolean
-  kind: 'loop' | 'parallel'
-  name?: string
-  /** Execution status passed by preview/snapshot views */
-  executionStatus?: 'success' | 'error' | 'not-executed'
-  /** Whether the parent workflow is locked and should render as read-only */
-  isWorkflowLocked?: boolean
-}
-
-const HANDLE_STYLE = {
-  top: `${HANDLE_POSITIONS.DEFAULT_Y_OFFSET}px`,
-  transform: 'translateY(-50%)',
-} as const
-
-/**
- * Reusable class names for Handle components.
- * Matches the styling pattern from workflow-block.tsx.
- */
-const getHandleClasses = (position: 'left' | 'right') => {
-  const baseClasses = '!z-[10] !cursor-crosshair !border-none !transition-[colors] !duration-150'
-  const colorClasses = '!bg-[var(--workflow-edge)]'
-
-  const positionClasses = {
-    left: '!left-[-8px] !h-5 !w-[7px] !rounded-l-[2px] !rounded-r-none hover-hover:!left-[-11px] hover-hover:!w-[10px] hover-hover:!rounded-l-full',
-    right:
-      '!right-[-8px] !h-5 !w-[7px] !rounded-r-[2px] !rounded-l-none hover-hover:!right-[-11px] hover-hover:!w-[10px] hover-hover:!rounded-r-full',
-  }
-
-  return cn(baseClasses, colorClasses, positionClasses[position])
-}
-
-/**
- * Subflow node component for loop and parallel execution containers.
- * Renders a resizable container with a header displaying the block name and icon,
- * handles for connections, and supports nested execution contexts.
+ * Editor container for {@link SubflowNodeView}.
  *
- * @param props - Node properties containing data and id
- * @returns Rendered subflow node component
+ * Resolves the subflow's enabled/locked/focus/diff/run state from the editor
+ * stores, computes its nesting depth from the ReactFlow node tree, and renders
+ * the pure view shared with the docs preview — injecting the editor-only
+ * {@link ActionBar} through the view's `actionBar` slot.
  */
 export const SubflowNodeComponent = memo(({ data, id, selected }: NodeProps<SubflowNodeData>) => {
   const { getNodes } = useReactFlow()
@@ -66,7 +23,7 @@ export const SubflowNodeComponent = memo(({ data, id, selected }: NodeProps<Subf
 
   const currentWorkflow = useCurrentWorkflow()
   const currentBlock = currentWorkflow.getBlockById(id)
-  const diffStatus: DiffStatus =
+  const diffStatus =
     currentWorkflow.isDiffMode && currentBlock && hasDiffStatus(currentBlock)
       ? currentBlock.is_diff
       : undefined
@@ -75,12 +32,10 @@ export const SubflowNodeComponent = memo(({ data, id, selected }: NodeProps<Subf
   const isLocked = currentBlock?.locked ?? false
   const isPreview = data?.isPreview || false
 
-  const setCurrentBlockId = usePanelEditorStore((state) => state.setCurrentBlockId)
   const currentBlockId = usePanelEditorStore((state) => state.currentBlockId)
+  const setCurrentBlockId = usePanelEditorStore((state) => state.setCurrentBlockId)
   const isFocused = currentBlockId === id
 
-  const isPreviewSelected = data?.isPreviewSelected || false
-
   const lastRunPath = useLastRunPath()
   const executionStatus = data.executionStatus
   const runPathStatus: 'success' | 'error' | undefined =
@@ -91,8 +46,8 @@ export const SubflowNodeComponent = memo(({ data, id, selected }: NodeProps<Subf
         : lastRunPath.get(id)
 
   /**
-   * Calculate the nesting level of this subflow node based on its parent hierarchy.
-   * Used to apply appropriate styling for nested containers.
+   * Nesting depth, walking the parent chain so the view can apply nested
+   * container styling.
    */
   const nestingLevel = useMemo(() => {
     let level = 0
@@ -108,178 +63,21 @@ export const SubflowNodeComponent = memo(({ data, id, selected }: NodeProps<Subf
     return level
   }, [data?.parentId, getNodes])
 
-  const startHandleId = data.kind === 'loop' ? 'loop-start-source' : 'parallel-start-source'
-  const endHandleId = data.kind === 'loop' ? 'loop-end-source' : 'parallel-end-source'
-  const BlockIcon = data.kind === 'loop' ? RepeatIcon : SplitIcon
-  const blockIconBg = data.kind === 'loop' ? '#2FB3FF' : '#FEE12B'
-  const blockName = data.name || (data.kind === 'loop' ? 'Loop' : 'Parallel')
-
-  /**
-   * Determine the ring styling based on subflow state priority:
-   * 1. Focused (selected in editor), selected (shift-click/box), or preview selected - blue ring
-   * 2. Diff status (version comparison) - green/orange ring
-   * 3. Run path status (execution result) - green/red ring
-   */
-  const isSelected = !isPreview && selected
-  const hasRing =
-    isFocused ||
-    isSelected ||
-    isPreviewSelected ||
-    diffStatus === 'new' ||
-    diffStatus === 'edited' ||
-    !!runPathStatus
-
-  /**
-   * Compute the ring color for the subflow selection indicator.
-   * Uses boxShadow (not CSS outline) to match the ring styling of regular workflow blocks.
-   * This works because ReactFlow renders child nodes as sibling divs at the viewport level
-   * (not as DOM children), so children at zIndex 1000 don't clip the parent's boxShadow.
-   */
-  const getRingColor = (): string | undefined => {
-    if (!hasRing) return undefined
-    if (isFocused || isSelected || isPreviewSelected) return 'var(--brand-secondary)'
-    if (diffStatus === 'new') return 'var(--brand-accent)'
-    if (diffStatus === 'edited') return 'var(--warning)'
-    if (runPathStatus === 'success') {
-      return executionStatus ? 'var(--brand-accent)' : 'var(--border-success)'
-    }
-    if (runPathStatus === 'error') return 'var(--text-error)'
-    return undefined
-  }
-  const ringColor = getRingColor()
-
   return (
-    <div className='group pointer-events-none relative'>
-      <div
-        className='relative select-none rounded-lg border border-[var(--border-1)] transition-block-bg'
-        style={{
-          width: data.width || 500,
-          height: data.height || 300,
-          overflow: 'visible',
-          pointerEvents: 'none',
-          ...(ringColor && {
-            boxShadow: `0 0 0 1.75px ${ringColor}`,
-          }),
-        }}
-        data-node-id={id}
-        data-type='subflowNode'
-        data-nesting-level={nestingLevel}
-        data-subflow-selected={isFocused || isSelected || isPreviewSelected}
-      >
-        {!isPreview && <ActionBar blockId={id} blockType={data.kind} disabled={!canEditWorkflow} />}
-
-        {/* Header Section */}
-        <div
-          role='button'
-          tabIndex={0}
-          aria-label={`Select ${blockName}`}
-          onClick={() => setCurrentBlockId(id)}
-          onKeyDown={(event) => handleKeyboardActivation(event, () => setCurrentBlockId(id))}
-          className='workflow-drag-handle flex cursor-grab items-center justify-between rounded-t-[8px] border-[var(--border)] border-b bg-[var(--surface-2)] py-2 pr-3 pl-2 [&:active]:cursor-grabbing'
-          style={{ pointerEvents: 'auto' }}
-        >
-          <div className='flex min-w-0 flex-1 items-center gap-2.5'>
-            <div
-              className='flex size-[24px] flex-shrink-0 items-center justify-center rounded-md'
-              style={{ backgroundColor: isEnabled ? blockIconBg : 'gray' }}
-            >
-              <BlockIcon className='size-[16px] text-white' />
-            </div>
-            <span
-              className={cn(
-                'truncate font-medium text-md',
-                !isEnabled && 'text-[var(--text-muted)]'
-              )}
-              title={blockName}
-            >
-              {blockName}
-            </span>
-          </div>
-          <div className='flex items-center gap-1'>
-            {!isEnabled && <Badge variant='gray-secondary'>disabled</Badge>}
-            {isLocked && <Badge variant='gray-secondary'>locked</Badge>}
-          </div>
-        </div>
-
-        {/*
-         * Subflow body background. Captures clicks to select the subflow in the
-         * panel editor, matching the header click behavior. Child nodes and edges
-         * are rendered as sibling divs at the viewport level by ReactFlow (not as
-         * DOM children), so enabling pointer events here doesn't block them.
-         */}
-        <div
-          role='button'
-          tabIndex={isPreview ? -1 : 0}
-          aria-label={`Select ${blockName}`}
-          className='workflow-drag-handle absolute inset-0 top-[44px] cursor-grab rounded-b-[8px] [&:active]:cursor-grabbing'
-          style={{ pointerEvents: isPreview ? 'none' : 'auto' }}
-          onClick={() => setCurrentBlockId(id)}
-          onKeyDown={(event) => handleKeyboardActivation(event, () => setCurrentBlockId(id))}
-        />
-
-        {!isPreview && canEditWorkflow && (
-          <div
-            role='separator'
-            aria-orientation='horizontal'
-            className='absolute right-[8px] bottom-2 z-20 flex size-[32px] cursor-se-resize items-center justify-center text-muted-foreground'
-            style={{ pointerEvents: 'auto' }}
-          />
-        )}
-
-        <div
-          className='relative h-[calc(100%-50px)] pt-4 pr-[80px] pb-4 pl-4'
-          data-dragarea='true'
-          style={{ pointerEvents: 'none' }}
-        >
-          {/* Subflow Start */}
-          <div
-            className='absolute top-4 left-[16px] flex items-center justify-center rounded-lg border border-[var(--border-1)] bg-[var(--surface-2)] px-3 py-1.5'
-            style={{ pointerEvents: isPreview ? 'none' : 'auto' }}
-            data-parent-id={id}
-            data-node-role={`${data.kind}-start`}
-            data-extent='parent'
-          >
-            <span className='font-medium text-[var(--text-primary)] text-sm'>Start</span>
-
-            <Handle
-              type='source'
-              position={Position.Right}
-              id={startHandleId}
-              className={getHandleClasses('right')}
-              style={{
-                top: '50%',
-                transform: 'translateY(-50%)',
-                pointerEvents: 'auto',
-              }}
-              data-parent-id={id}
-            />
-          </div>
-        </div>
-
-        {/* Input handle on left middle */}
-        <Handle
-          type='target'
-          position={Position.Left}
-          className={getHandleClasses('left')}
-          style={{
-            ...HANDLE_STYLE,
-            pointerEvents: 'auto',
-          }}
-        />
-
-        {/* Output handle on right middle */}
-        <Handle
-          type='source'
-          position={Position.Right}
-          className={getHandleClasses('right')}
-          style={{
-            ...HANDLE_STYLE,
-            pointerEvents: 'auto',
-          }}
-          id={endHandleId}
-        />
-      </div>
-    </div>
+    <SubflowNodeView
+      id={id}
+      data={data}
+      selected={selected}
+      isEnabled={isEnabled}
+      isLocked={isLocked}
+      isFocused={isFocused}
+      runPathStatus={runPathStatus}
+      diffStatus={diffStatus}
+      nestingLevel={nestingLevel}
+      canEditWorkflow={canEditWorkflow}
+      onSelect={() => setCurrentBlockId(id)}
+      actionBar={<ActionBar blockId={id} blockType={data.kind} disabled={!canEditWorkflow} />}
+    />
   )
 })
 
diff --git a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/workflow-block/workflow-block.tsx b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/workflow-block/workflow-block.tsx
index e7ab081e103..df248f3b392 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/workflow-block/workflow-block.tsx
+++ b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/workflow-block/workflow-block.tsx
@@ -1,6 +1,7 @@
 import { memo, useCallback, useEffect, useMemo, useRef } from 'react'
 import { Badge, cn, handleKeyboardActivation, Tooltip } from '@sim/emcn'
 import { createLogger } from '@sim/logger'
+import { HANDLE_POSITIONS } from '@sim/workflow-renderer'
 import { isEqual } from 'es-toolkit'
 import { useParams } from 'next/navigation'
 import { Handle, type NodeProps, Position, useUpdateNodeInternals } from 'reactflow'
@@ -8,7 +9,6 @@ import { useStoreWithEqualityFn } from 'zustand/traditional'
 import { getBaseUrl } from '@/lib/core/utils/urls'
 import { createMcpToolId } from '@/lib/mcp/shared'
 import { getProviderIdFromServiceId } from '@/lib/oauth'
-import { HANDLE_POSITIONS } from '@/lib/workflows/blocks/block-dimensions'
 import { calculateWorkflowBlockDimensions } from '@/lib/workflows/blocks/deterministic-dimensions'
 import { getConditionRows, getRouterRows } from '@/lib/workflows/dynamic-handle-topology'
 import {
diff --git a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/workflow-edge/workflow-edge.tsx b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/workflow-edge/workflow-edge.tsx
index ed4840eae81..eff2ef11c30 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/workflow-edge/workflow-edge.tsx
+++ b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/workflow-edge/workflow-edge.tsx
@@ -1,8 +1,7 @@
 import { memo, useMemo } from 'react'
-import { X } from 'lucide-react'
-import { BaseEdge, EdgeLabelRenderer, type EdgeProps, getSmoothStepPath } from 'reactflow'
+import { type EdgeDiffStatus, WorkflowEdgeView } from '@sim/workflow-renderer'
+import type { EdgeProps } from 'reactflow'
 import { useShallow } from 'zustand/react/shallow'
-import type { EdgeDiffStatus } from '@/lib/workflows/diff/types'
 import { useLastRunEdges } from '@/stores/execution'
 import { useWorkflowDiffStore } from '@/stores/workflow-diff'
 
@@ -12,35 +11,14 @@ interface WorkflowEdgeProps extends EdgeProps {
   targetHandle?: string | null
 }
 
-const WorkflowEdgeComponent = ({
-  id,
-  sourceX,
-  sourceY,
-  targetX,
-  targetY,
-  sourcePosition,
-  targetPosition,
-  data,
-  style,
-  source,
-  target,
-  sourceHandle,
-  targetHandle,
-}: WorkflowEdgeProps) => {
-  const isHorizontal = sourcePosition === 'right' || sourcePosition === 'left'
-
-  const [edgePath, labelX, labelY] = getSmoothStepPath({
-    sourceX,
-    sourceY,
-    sourcePosition,
-    targetX,
-    targetY,
-    targetPosition,
-    borderRadius: 8,
-    offset: isHorizontal ? 30 : 20,
-  })
-
-  const isSelected = data?.isSelected ?? false
+/**
+ * Editor container for {@link WorkflowEdgeView}.
+ *
+ * Reads the diff and execution stores, resolves the edge's diff/run state, and
+ * passes it to the pure renderer shared with the docs preview.
+ */
+const WorkflowEdgeComponent = (props: WorkflowEdgeProps) => {
+  const { id, data, source, target, sourceHandle, targetHandle } = props
 
   const { diffAnalysis, isShowingDiff, isDiffReady } = useWorkflowDiffStore(
     useShallow((state) => ({
@@ -51,14 +29,12 @@ const WorkflowEdgeComponent = ({
   )
   const lastRunEdges = useLastRunEdges()
 
-  const dataSourceHandle = (data as { sourceHandle?: string } | undefined)?.sourceHandle
-  const isErrorEdge = (sourceHandle ?? dataSourceHandle) === 'error'
   const previewExecutionStatus = (
     data as { executionStatus?: 'success' | 'error' | 'not-executed' } | undefined
   )?.executionStatus
-  const edgeRunStatus = previewExecutionStatus || lastRunEdges.get(id)
+  const runStatus = previewExecutionStatus || lastRunEdges.get(id)
 
-  const edgeDiffStatus = useMemo((): EdgeDiffStatus => {
+  const diffStatus = useMemo((): EdgeDiffStatus => {
     if (data?.isDeleted) return 'deleted'
     if (!diffAnalysis?.edge_diff || !isDiffReady) return null
 
@@ -84,84 +60,14 @@ const WorkflowEdgeComponent = ({
     targetHandle,
   ])
 
-  const edgeStyle = useMemo(() => {
-    let color = 'var(--workflow-edge)'
-    let opacity = 1
-
-    if (edgeDiffStatus === 'deleted') {
-      color = 'var(--text-error)'
-      opacity = 0.7
-    } else if (edgeDiffStatus === 'new') {
-      color = 'var(--brand-accent)'
-    } else if (edgeRunStatus === 'success') {
-      // Use green for preview mode, default for canvas execution
-      color = previewExecutionStatus ? 'var(--brand-accent)' : 'var(--border-success)'
-    } else if (edgeRunStatus === 'error') {
-      color = 'var(--text-error)'
-    } else if (isErrorEdge) {
-      // Error edges that weren't taken stay red
-      color = 'var(--text-error)'
-    }
-
-    if (isSelected) {
-      opacity = 0.5
-    }
-
-    return {
-      ...(style ?? {}),
-      strokeWidth: edgeDiffStatus
-        ? 3
-        : edgeRunStatus === 'success' || edgeRunStatus === 'error'
-          ? 2.5
-          : isSelected
-            ? 2.5
-            : 2,
-      stroke: color,
-      strokeDasharray: edgeDiffStatus === 'deleted' ? '10,5' : undefined,
-      opacity,
-    }
-  }, [style, edgeDiffStatus, isSelected, isErrorEdge, edgeRunStatus, previewExecutionStatus])
-
   return (
-    <>
-      <BaseEdge path={edgePath} style={edgeStyle} interactionWidth={30} />
-
-      {isSelected && (
-        <EdgeLabelRenderer>
-          <button
-            type='button'
-            className='nodrag nopan group flex size-[22px] cursor-pointer items-center justify-center transition-colors'
-            style={{
-              position: 'absolute',
-              transform: `translate(-50%, -50%) translate(${labelX}px,${labelY}px)`,
-              pointerEvents: 'all',
-              zIndex: 1011,
-            }}
-            onClick={(e) => {
-              e.preventDefault()
-              e.stopPropagation()
-
-              if (data?.onDelete) {
-                data.onDelete(id)
-              }
-            }}
-          >
-            <X className='size-4 text-[var(--text-error)] transition-colors group-hover:text-[color-mix(in_srgb,var(--text-error)_80%,transparent)]' />
-          </button>
-        </EdgeLabelRenderer>
-      )}
-    </>
+    <WorkflowEdgeView
+      {...props}
+      diffStatus={diffStatus}
+      runStatus={runStatus}
+      isPreviewRun={Boolean(previewExecutionStatus)}
+    />
   )
 }
 
-/**
- * Workflow edge component with execution status and diff visualization.
- *
- * @remarks
- * Edge coloring priority:
- * 1. Diff status (deleted/new) - for version comparison
- * 2. Execution status (success/error) - for run visualization
- * 3. Error edge default (red) - for untaken error paths
- * 4. Default edge color - normal workflow connections
- */
 export const WorkflowEdge = memo(WorkflowEdgeComponent)
diff --git a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/hooks/use-node-utilities.ts b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/hooks/use-node-utilities.ts
index f8578d95eab..77d5cde2635 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/hooks/use-node-utilities.ts
+++ b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/hooks/use-node-utilities.ts
@@ -1,7 +1,7 @@
 import { useCallback } from 'react'
 import { createLogger } from '@sim/logger'
+import { BLOCK_DIMENSIONS, CONTAINER_DIMENSIONS } from '@sim/workflow-renderer'
 import { useReactFlow } from 'reactflow'
-import { BLOCK_DIMENSIONS, CONTAINER_DIMENSIONS } from '@/lib/workflows/blocks/block-dimensions'
 import {
   calculateContainerDimensions,
   clampPositionToContainer,
diff --git a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/utils/node-position-utils.ts b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/utils/node-position-utils.ts
index 01068ff1115..ccefe9f3d3f 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/utils/node-position-utils.ts
+++ b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/utils/node-position-utils.ts
@@ -1,4 +1,4 @@
-import { BLOCK_DIMENSIONS, CONTAINER_DIMENSIONS } from '@/lib/workflows/blocks/block-dimensions'
+import { BLOCK_DIMENSIONS, CONTAINER_DIMENSIONS } from '@sim/workflow-renderer'
 import { getBlock } from '@/blocks/registry'
 
 /**
diff --git a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/utils/workflow-canvas-helpers.ts b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/utils/workflow-canvas-helpers.ts
index 18b3c4ec186..2fa772f78bb 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/utils/workflow-canvas-helpers.ts
+++ b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/utils/workflow-canvas-helpers.ts
@@ -1,5 +1,5 @@
+import { BLOCK_DIMENSIONS, CONTAINER_DIMENSIONS } from '@sim/workflow-renderer'
 import type { Edge, Node } from 'reactflow'
-import { BLOCK_DIMENSIONS, CONTAINER_DIMENSIONS } from '@/lib/workflows/blocks/block-dimensions'
 import { TriggerUtils } from '@/lib/workflows/triggers/triggers'
 import { clampPositionToContainer } from '@/app/workspace/[workspaceId]/w/[workflowId]/utils/node-position-utils'
 import type { BlockState } from '@/stores/workflows/workflow/types'
diff --git a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/workflow.tsx b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/workflow.tsx
index dcf180f6f9f..1e87115e592 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/workflow.tsx
+++ b/apps/sim/app/workspace/[workspaceId]/w/[workflowId]/workflow.tsx
@@ -16,12 +16,13 @@ import 'reactflow/dist/style.css'
 import { toast } from '@sim/emcn'
 import { createLogger } from '@sim/logger'
 import { generateId } from '@sim/utils/id'
+import type { SubflowNodeData } from '@sim/workflow-renderer'
+import { BLOCK_DIMENSIONS, CONTAINER_DIMENSIONS } from '@sim/workflow-renderer'
 import { useShallow } from 'zustand/react/shallow'
 import { useSession } from '@/lib/auth/auth-client'
 import type { OAuthConnectEventDetail } from '@/lib/copilot/tools/client/base-tool'
 import { consumeOAuthReturnContext, writeOAuthReturnContext } from '@/lib/credentials/client-state'
 import type { OAuthProvider } from '@/lib/oauth'
-import { BLOCK_DIMENSIONS, CONTAINER_DIMENSIONS } from '@/lib/workflows/blocks/block-dimensions'
 import { TriggerUtils } from '@/lib/workflows/triggers/triggers'
 import { ConnectOAuthModal } from '@/app/workspace/[workspaceId]/components/connect-oauth-modal'
 import { useWorkspacePermissionsContext } from '@/app/workspace/[workspaceId]/providers/workspace-permissions-provider'
@@ -36,7 +37,6 @@ import { CanvasMenu } from '@/app/workspace/[workspaceId]/w/[workflowId]/compone
 import { Cursors } from '@/app/workspace/[workspaceId]/w/[workflowId]/components/cursors/cursors'
 import { ErrorBoundary } from '@/app/workspace/[workspaceId]/w/[workflowId]/components/error/index'
 import { WorkflowSearchReplace } from '@/app/workspace/[workspaceId]/w/[workflowId]/components/search-replace/workflow-search-replace'
-import type { SubflowNodeData } from '@/app/workspace/[workspaceId]/w/[workflowId]/components/subflows/subflow-node'
 import { WorkflowControls } from '@/app/workspace/[workspaceId]/w/[workflowId]/components/workflow-controls/workflow-controls'
 import {
   useAutoLayout,
diff --git a/apps/sim/app/workspace/[workspaceId]/w/components/preview/components/preview-workflow/components/block/block.tsx b/apps/sim/app/workspace/[workspaceId]/w/components/preview/components/preview-workflow/components/block/block.tsx
index 7130ec1b7b6..0fbe922788d 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/components/preview/components/preview-workflow/components/block/block.tsx
+++ b/apps/sim/app/workspace/[workspaceId]/w/components/preview/components/preview-workflow/components/block/block.tsx
@@ -1,8 +1,8 @@
 'use client'
 
 import { type CSSProperties, memo, useMemo } from 'react'
+import { HANDLE_POSITIONS } from '@sim/workflow-renderer'
 import { Handle, type NodeProps, Position } from 'reactflow'
-import { HANDLE_POSITIONS } from '@/lib/workflows/blocks/block-dimensions'
 import {
   getDisplayValue,
   resolveDropdownLabel,
diff --git a/apps/sim/app/workspace/[workspaceId]/w/components/preview/components/preview-workflow/components/subflow/subflow.tsx b/apps/sim/app/workspace/[workspaceId]/w/components/preview/components/preview-workflow/components/subflow/subflow.tsx
index 21ab8164aba..56b91370308 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/components/preview/components/preview-workflow/components/subflow/subflow.tsx
+++ b/apps/sim/app/workspace/[workspaceId]/w/components/preview/components/preview-workflow/components/subflow/subflow.tsx
@@ -2,9 +2,9 @@
 
 import { memo } from 'react'
 import { Badge, cn } from '@sim/emcn'
+import { HANDLE_POSITIONS } from '@sim/workflow-renderer'
 import { RepeatIcon, SplitIcon } from 'lucide-react'
 import { Handle, type NodeProps, Position } from 'reactflow'
-import { HANDLE_POSITIONS } from '@/lib/workflows/blocks/block-dimensions'
 
 /** Execution status for subflows in preview mode */
 type ExecutionStatus = 'success' | 'error' | 'not-executed'
diff --git a/apps/sim/app/workspace/[workspaceId]/w/components/preview/components/preview-workflow/preview-workflow.tsx b/apps/sim/app/workspace/[workspaceId]/w/components/preview/components/preview-workflow/preview-workflow.tsx
index 96484163a96..ee0790ad673 100644
--- a/apps/sim/app/workspace/[workspaceId]/w/components/preview/components/preview-workflow/preview-workflow.tsx
+++ b/apps/sim/app/workspace/[workspaceId]/w/components/preview/components/preview-workflow/preview-workflow.tsx
@@ -15,7 +15,7 @@ import 'reactflow/dist/style.css'
 
 import { cn } from '@sim/emcn'
 import { createLogger } from '@sim/logger'
-import { BLOCK_DIMENSIONS, CONTAINER_DIMENSIONS } from '@/lib/workflows/blocks/block-dimensions'
+import { BLOCK_DIMENSIONS, CONTAINER_DIMENSIONS } from '@sim/workflow-renderer'
 import { WorkflowEdge } from '@/app/workspace/[workspaceId]/w/[workflowId]/components/workflow-edge/workflow-edge'
 import { estimateBlockDimensions } from '@/app/workspace/[workspaceId]/w/[workflowId]/utils'
 import { PreviewBlock } from '@/app/workspace/[workspaceId]/w/components/preview/components/preview-workflow/components/block'
diff --git a/apps/sim/hooks/use-canvas-viewport.ts b/apps/sim/hooks/use-canvas-viewport.ts
index 44d3739fd3a..1c4cf902e15 100644
--- a/apps/sim/hooks/use-canvas-viewport.ts
+++ b/apps/sim/hooks/use-canvas-viewport.ts
@@ -1,6 +1,6 @@
 import { useCallback, useMemo } from 'react'
+import { BLOCK_DIMENSIONS } from '@sim/workflow-renderer'
 import type { Node, ReactFlowInstance } from 'reactflow'
-import { BLOCK_DIMENSIONS } from '@/lib/workflows/blocks/block-dimensions'
 
 interface VisibleBounds {
   width: number
diff --git a/apps/sim/lib/workflows/autolayout/constants.ts b/apps/sim/lib/workflows/autolayout/constants.ts
index 8e64b3cfca2..f4a9356d4cb 100644
--- a/apps/sim/lib/workflows/autolayout/constants.ts
+++ b/apps/sim/lib/workflows/autolayout/constants.ts
@@ -2,7 +2,7 @@
  * Autolayout Constants
  *
  * Layout algorithm specific constants for spacing, padding, and overlap detection.
- * Block dimensions are in @/lib/workflows/blocks/block-dimensions
+ * Block dimensions are in @sim/workflow-renderer
  */
 
 /**
diff --git a/apps/sim/lib/workflows/autolayout/containers.ts b/apps/sim/lib/workflows/autolayout/containers.ts
index f1f68ebf5b3..f3b7a244199 100644
--- a/apps/sim/lib/workflows/autolayout/containers.ts
+++ b/apps/sim/lib/workflows/autolayout/containers.ts
@@ -1,4 +1,5 @@
 import { createLogger } from '@sim/logger'
+import { CONTAINER_DIMENSIONS } from '@sim/workflow-renderer'
 import {
   CONTAINER_PADDING_X,
   CONTAINER_PADDING_Y,
@@ -7,7 +8,6 @@ import {
 import { layoutBlocksCore } from '@/lib/workflows/autolayout/core'
 import type { Edge, LayoutOptions } from '@/lib/workflows/autolayout/types'
 import { filterLayoutEligibleBlockIds, getBlocksByParent } from '@/lib/workflows/autolayout/utils'
-import { CONTAINER_DIMENSIONS } from '@/lib/workflows/blocks/block-dimensions'
 import type { BlockState } from '@/stores/workflows/workflow/types'
 
 const logger = createLogger('AutoLayout:Containers')
diff --git a/apps/sim/lib/workflows/autolayout/core.ts b/apps/sim/lib/workflows/autolayout/core.ts
index 014aa37ea3e..94035ebe90d 100644
--- a/apps/sim/lib/workflows/autolayout/core.ts
+++ b/apps/sim/lib/workflows/autolayout/core.ts
@@ -1,4 +1,5 @@
 import { createLogger } from '@sim/logger'
+import { BLOCK_DIMENSIONS, HANDLE_POSITIONS } from '@sim/workflow-renderer'
 import {
   CONTAINER_LAYOUT_OPTIONS,
   DEFAULT_LAYOUT_OPTIONS,
@@ -11,7 +12,6 @@ import {
   prepareBlockMetrics,
   snapNodesToGrid,
 } from '@/lib/workflows/autolayout/utils'
-import { BLOCK_DIMENSIONS, HANDLE_POSITIONS } from '@/lib/workflows/blocks/block-dimensions'
 import { EDGE } from '@/executor/constants'
 import type { BlockState } from '@/stores/workflows/workflow/types'
 
diff --git a/apps/sim/lib/workflows/autolayout/targeted.ts b/apps/sim/lib/workflows/autolayout/targeted.ts
index cd8539e84be..0d8c9c2202f 100644
--- a/apps/sim/lib/workflows/autolayout/targeted.ts
+++ b/apps/sim/lib/workflows/autolayout/targeted.ts
@@ -1,3 +1,4 @@
+import { CONTAINER_DIMENSIONS } from '@sim/workflow-renderer'
 import {
   CONTAINER_PADDING,
   DEFAULT_HORIZONTAL_SPACING,
@@ -17,7 +18,6 @@ import {
   shouldSkipAutoLayout,
   snapPositionToGrid,
 } from '@/lib/workflows/autolayout/utils'
-import { CONTAINER_DIMENSIONS } from '@/lib/workflows/blocks/block-dimensions'
 import type { BlockState } from '@/stores/workflows/workflow/types'
 
 type TargetedBlockInfo = {
diff --git a/apps/sim/lib/workflows/autolayout/utils.ts b/apps/sim/lib/workflows/autolayout/utils.ts
index bd77abeb980..cd8fc3ada11 100644
--- a/apps/sim/lib/workflows/autolayout/utils.ts
+++ b/apps/sim/lib/workflows/autolayout/utils.ts
@@ -1,3 +1,4 @@
+import { BLOCK_DIMENSIONS, CONTAINER_DIMENSIONS } from '@sim/workflow-renderer'
 import {
   AUTO_LAYOUT_EXCLUDED_TYPES,
   CONTAINER_BLOCK_TYPES,
@@ -9,7 +10,6 @@ import {
   ROOT_PADDING_Y,
 } from '@/lib/workflows/autolayout/constants'
 import type { BlockMetrics, BoundingBox, Edge, GraphNode } from '@/lib/workflows/autolayout/types'
-import { BLOCK_DIMENSIONS, CONTAINER_DIMENSIONS } from '@/lib/workflows/blocks/block-dimensions'
 import { calculateWorkflowBlockDimensions } from '@/lib/workflows/blocks/deterministic-dimensions'
 import { getConditionRows, getRouterRows } from '@/lib/workflows/dynamic-handle-topology'
 import {
diff --git a/apps/sim/lib/workflows/blocks/deterministic-dimensions.ts b/apps/sim/lib/workflows/blocks/deterministic-dimensions.ts
index 24e236f7333..b3d8145e91b 100644
--- a/apps/sim/lib/workflows/blocks/deterministic-dimensions.ts
+++ b/apps/sim/lib/workflows/blocks/deterministic-dimensions.ts
@@ -1,4 +1,4 @@
-import { BLOCK_DIMENSIONS } from '@/lib/workflows/blocks/block-dimensions'
+import { BLOCK_DIMENSIONS } from '@sim/workflow-renderer'
 import type { BlockConfig } from '@/blocks/types'
 
 interface WorkflowBlockDimensionsInput {
diff --git a/apps/sim/next.config.ts b/apps/sim/next.config.ts
index ee86254525e..40c28328ee1 100644
--- a/apps/sim/next.config.ts
+++ b/apps/sim/next.config.ts
@@ -172,6 +172,7 @@ const nextConfig: NextConfig = {
     '@t3-oss/env-core',
     '@sim/db',
     '@sim/emcn',
+    '@sim/workflow-renderer',
   ],
   async headers() {
     return [
diff --git a/apps/sim/package.json b/apps/sim/package.json
index c94cc5aba6d..2809c27375c 100644
--- a/apps/sim/package.json
+++ b/apps/sim/package.json
@@ -105,6 +105,7 @@
     "@sim/security": "workspace:*",
     "@sim/utils": "workspace:*",
     "@sim/workflow-persistence": "workspace:*",
+    "@sim/workflow-renderer": "workspace:*",
     "@sim/workflow-types": "workspace:*",
     "@t3-oss/env-nextjs": "0.13.4",
     "@tanstack/react-query": "5.90.8",
diff --git a/apps/sim/tailwind.config.ts b/apps/sim/tailwind.config.ts
index cd978e7c068..0d65b3b258a 100644
--- a/apps/sim/tailwind.config.ts
+++ b/apps/sim/tailwind.config.ts
@@ -7,6 +7,7 @@ export default {
     './components/**/*.{js,ts,jsx,tsx,mdx}',
     './app/**/*.{js,ts,jsx,tsx,mdx}',
     '../../packages/emcn/src/**/*.{js,ts,jsx,tsx}',
+    '../../packages/workflow-renderer/src/**/*.{js,ts,jsx,tsx}',
     '!./app/node_modules/**',
     '!**/node_modules/**',
   ],
diff --git a/bun.lock b/bun.lock
index 2b92202f9ae..1d0973d9c00 100644
--- a/bun.lock
+++ b/bun.lock
@@ -171,6 +171,7 @@
         "@sim/security": "workspace:*",
         "@sim/utils": "workspace:*",
         "@sim/workflow-persistence": "workspace:*",
+        "@sim/workflow-renderer": "workspace:*",
         "@sim/workflow-types": "workspace:*",
         "@t3-oss/env-nextjs": "0.13.4",
         "@tanstack/react-query": "5.90.8",
@@ -527,6 +528,27 @@
         "typescript": "^5.7.3",
       },
     },
+    "packages/workflow-renderer": {
+      "name": "@sim/workflow-renderer",
+      "version": "0.1.0",
+      "devDependencies": {
+        "@sim/tsconfig": "workspace:*",
+        "@types/react": "^19",
+        "lucide-react": "^0.479.0",
+        "react": "19.2.4",
+        "reactflow": "^11.11.4",
+        "remark-breaks": "^4.0.0",
+        "streamdown": "2.5.0",
+        "typescript": "^5.7.3",
+      },
+      "peerDependencies": {
+        "lucide-react": ">=0.479.0",
+        "react": "^19",
+        "reactflow": "^11.11.4",
+        "remark-breaks": "^4.0.0",
+        "streamdown": ">=2.5.0",
+      },
+    },
     "packages/workflow-types": {
       "name": "@sim/workflow-types",
       "version": "0.1.0",
@@ -1544,6 +1566,8 @@
 
     "@sim/workflow-persistence": ["@sim/workflow-persistence@workspace:packages/workflow-persistence"],
 
+    "@sim/workflow-renderer": ["@sim/workflow-renderer@workspace:packages/workflow-renderer"],
+
     "@sim/workflow-types": ["@sim/workflow-types@workspace:packages/workflow-types"],
 
     "@smithy/config-resolver": ["@smithy/config-resolver@4.6.0", "", { "dependencies": { "@smithy/core": "^3.25.0", "tslib": "^2.6.2" } }, "sha512-NJF/Xc69G68BzZMKMEpWkCY9HjZJzTWztTW4VxBC2SodX+H60xw+NGckNhkgg4uMRHrpDkhWeBeigM3YJmv1FQ=="],
diff --git a/packages/workflow-renderer/package.json b/packages/workflow-renderer/package.json
new file mode 100644
index 00000000000..65274c95eb0
--- /dev/null
+++ b/packages/workflow-renderer/package.json
@@ -0,0 +1,45 @@
+{
+  "name": "@sim/workflow-renderer",
+  "version": "0.1.0",
+  "private": true,
+  "sideEffects": [
+    "**/*.css",
+    "**/note-block-view.tsx"
+  ],
+  "type": "module",
+  "license": "Apache-2.0",
+  "engines": {
+    "bun": ">=1.2.13",
+    "node": ">=20.0.0"
+  },
+  "exports": {
+    ".": {
+      "types": "./src/index.ts",
+      "default": "./src/index.ts"
+    }
+  },
+  "scripts": {
+    "type-check": "tsc --noEmit",
+    "lint": "biome check --write --unsafe .",
+    "lint:check": "biome check .",
+    "format": "biome format --write .",
+    "format:check": "biome format ."
+  },
+  "peerDependencies": {
+    "lucide-react": ">=0.479.0",
+    "react": "^19",
+    "reactflow": "^11.11.4",
+    "remark-breaks": "^4.0.0",
+    "streamdown": ">=2.5.0"
+  },
+  "devDependencies": {
+    "@sim/tsconfig": "workspace:*",
+    "@types/react": "^19",
+    "lucide-react": "^0.479.0",
+    "react": "19.2.4",
+    "reactflow": "^11.11.4",
+    "remark-breaks": "^4.0.0",
+    "streamdown": "2.5.0",
+    "typescript": "^5.7.3"
+  }
+}
diff --git a/packages/workflow-renderer/src/css-modules.d.ts b/packages/workflow-renderer/src/css-modules.d.ts
new file mode 100644
index 00000000000..21599b894ea
--- /dev/null
+++ b/packages/workflow-renderer/src/css-modules.d.ts
@@ -0,0 +1,9 @@
+/**
+ * Ambient declaration for CSS Modules. The renderer compiles `@sim/emcn` source
+ * (which imports CSS modules) as part of its program, so it needs this in scope
+ * for a standalone type-check. Consuming apps (Next.js) provide their own.
+ */
+declare module '*.module.css' {
+  const classes: { readonly [key: string]: string }
+  export default classes
+}
diff --git a/apps/sim/lib/workflows/blocks/block-dimensions.ts b/packages/workflow-renderer/src/dimensions.ts
similarity index 100%
rename from apps/sim/lib/workflows/blocks/block-dimensions.ts
rename to packages/workflow-renderer/src/dimensions.ts
diff --git a/packages/workflow-renderer/src/edge/workflow-edge-view.tsx b/packages/workflow-renderer/src/edge/workflow-edge-view.tsx
new file mode 100644
index 00000000000..6256d8f70df
--- /dev/null
+++ b/packages/workflow-renderer/src/edge/workflow-edge-view.tsx
@@ -0,0 +1,134 @@
+import { useMemo } from 'react'
+import { X } from 'lucide-react'
+import { BaseEdge, EdgeLabelRenderer, type EdgeProps, getSmoothStepPath } from 'reactflow'
+import type { EdgeDiffStatus, EdgeRunStatus } from '../types'
+
+/**
+ * Props for the pure workflow edge renderer.
+ *
+ * Geometry and `data` come straight from ReactFlow. The visual state that would
+ * otherwise be read from stores — diff status, run status, and whether the run
+ * status originated from a preview — is resolved by the container and passed in.
+ */
+export interface WorkflowEdgeViewProps extends EdgeProps {
+  sourceHandle?: string | null
+  /** Pre-resolved diff state (container reads the diff store). */
+  diffStatus: EdgeDiffStatus
+  /** Pre-resolved execution outcome (container reads the execution store). */
+  runStatus: EdgeRunStatus
+  /** Whether `runStatus` came from a preview run (drives success coloring). */
+  isPreviewRun: boolean
+}
+
+/**
+ * Pure workflow edge renderer with execution status and diff visualization.
+ *
+ * @remarks
+ * Edge coloring priority:
+ * 1. Diff status (deleted/new) - for version comparison
+ * 2. Execution status (success/error) - for run visualization
+ * 3. Error edge default (red) - for untaken error paths
+ * 4. Default edge color - normal workflow connections
+ */
+export function WorkflowEdgeView({
+  id,
+  sourceX,
+  sourceY,
+  targetX,
+  targetY,
+  sourcePosition,
+  targetPosition,
+  data,
+  style,
+  sourceHandle,
+  diffStatus,
+  runStatus,
+  isPreviewRun,
+}: WorkflowEdgeViewProps) {
+  const isHorizontal = sourcePosition === 'right' || sourcePosition === 'left'
+
+  const [edgePath, labelX, labelY] = getSmoothStepPath({
+    sourceX,
+    sourceY,
+    sourcePosition,
+    targetX,
+    targetY,
+    targetPosition,
+    borderRadius: 8,
+    offset: isHorizontal ? 30 : 20,
+  })
+
+  const isSelected = data?.isSelected ?? false
+
+  const dataSourceHandle = (data as { sourceHandle?: string } | undefined)?.sourceHandle
+  const isErrorEdge = (sourceHandle ?? dataSourceHandle) === 'error'
+
+  const edgeStyle = useMemo(() => {
+    let color = 'var(--workflow-edge)'
+    let opacity = 1
+
+    if (diffStatus === 'deleted') {
+      color = 'var(--text-error)'
+      opacity = 0.7
+    } else if (diffStatus === 'new') {
+      color = 'var(--brand-accent)'
+    } else if (runStatus === 'success') {
+      // Use green for preview mode, default for canvas execution
+      color = isPreviewRun ? 'var(--brand-accent)' : 'var(--border-success)'
+    } else if (runStatus === 'error') {
+      color = 'var(--text-error)'
+    } else if (isErrorEdge) {
+      // Error edges that weren't taken stay red
+      color = 'var(--text-error)'
+    }
+
+    if (isSelected) {
+      opacity = 0.5
+    }
+
+    return {
+      ...(style ?? {}),
+      strokeWidth: diffStatus
+        ? 3
+        : runStatus === 'success' || runStatus === 'error'
+          ? 2.5
+          : isSelected
+            ? 2.5
+            : 2,
+      stroke: color,
+      strokeDasharray: diffStatus === 'deleted' ? '10,5' : undefined,
+      opacity,
+    }
+  }, [style, diffStatus, isSelected, isErrorEdge, runStatus, isPreviewRun])
+
+  return (
+    <>
+      <BaseEdge path={edgePath} style={edgeStyle} interactionWidth={30} />
+
+      {isSelected && (
+        <EdgeLabelRenderer>
+          <button
+            type='button'
+            className='nodrag nopan group flex size-[22px] cursor-pointer items-center justify-center transition-colors'
+            style={{
+              position: 'absolute',
+              transform: `translate(-50%, -50%) translate(${labelX}px,${labelY}px)`,
+              pointerEvents: 'all',
+              zIndex: 1011,
+            }}
+            onClick={(e) => {
+              e.preventDefault()
+              e.stopPropagation()
+
+              if (data?.onDelete) {
+                data.onDelete(id)
+              }
+            }}
+          >
+            <X className='size-4 text-[var(--text-error)] transition-colors group-hover:text-[color-mix(in_srgb,var(--text-error)_80%,transparent)]' />
+          </button>
+        </EdgeLabelRenderer>
+      )}
+    </>
+  )
+}
diff --git a/packages/workflow-renderer/src/index.ts b/packages/workflow-renderer/src/index.ts
new file mode 100644
index 00000000000..482d9a4551f
--- /dev/null
+++ b/packages/workflow-renderer/src/index.ts
@@ -0,0 +1,9 @@
+export * from './dimensions'
+export { WorkflowEdgeView, type WorkflowEdgeViewProps } from './edge/workflow-edge-view'
+export { NoteBlockView, type NoteBlockViewProps } from './note/note-block-view'
+export {
+  type SubflowNodeData,
+  SubflowNodeView,
+  type SubflowNodeViewProps,
+} from './subflow/subflow-node-view'
+export type { BlockRunStatus, DiffStatus, EdgeDiffStatus, EdgeRunStatus } from './types'
diff --git a/packages/workflow-renderer/src/note/note-block-view.tsx b/packages/workflow-renderer/src/note/note-block-view.tsx
new file mode 100644
index 00000000000..cf1dac38e8f
--- /dev/null
+++ b/packages/workflow-renderer/src/note/note-block-view.tsx
@@ -0,0 +1,517 @@
+import { memo, type ReactNode } from 'react'
+import remarkBreaks from 'remark-breaks'
+import { Streamdown } from 'streamdown'
+import 'streamdown/styles.css'
+import { cn, handleKeyboardActivation } from '@sim/emcn'
+
+type EmbedInfo = {
+  url: string
+  type: 'iframe' | 'video' | 'audio'
+  aspectRatio?: string
+}
+
+const EMBED_SCALE = 0.78
+const EMBED_INVERSE_SCALE = `${(1 / EMBED_SCALE) * 100}%`
+
+function getTwitchParent(): string {
+  return typeof window !== 'undefined' ? window.location.hostname : 'localhost'
+}
+
+/**
+ * Get embed info for supported media platforms
+ */
+function getEmbedInfo(url: string): EmbedInfo | null {
+  const youtubeMatch = url.match(
+    /(?:youtube\.com\/watch\?(?:.*&)?v=|youtu\.be\/|youtube\.com\/embed\/)([a-zA-Z0-9_-]{11})/
+  )
+  if (youtubeMatch) {
+    return { url: `https://www.youtube.com/embed/${youtubeMatch[1]}`, type: 'iframe' }
+  }
+
+  const vimeoMatch = url.match(/vimeo\.com\/(\d+)/)
+  if (vimeoMatch) {
+    return { url: `https://player.vimeo.com/video/${vimeoMatch[1]}`, type: 'iframe' }
+  }
+
+  const dailymotionMatch = url.match(/dailymotion\.com\/video\/([a-zA-Z0-9]+)/)
+  if (dailymotionMatch) {
+    return { url: `https://www.dailymotion.com/embed/video/${dailymotionMatch[1]}`, type: 'iframe' }
+  }
+
+  const twitchVideoMatch = url.match(/twitch\.tv\/videos\/(\d+)/)
+  if (twitchVideoMatch) {
+    return {
+      url: `https://player.twitch.tv/?video=${twitchVideoMatch[1]}&parent=${getTwitchParent()}`,
+      type: 'iframe',
+    }
+  }
+
+  const twitchChannelMatch = url.match(/twitch\.tv\/([a-zA-Z0-9_]+)(?:\/|$)/)
+  if (twitchChannelMatch && !url.includes('/videos/') && !url.includes('/clip/')) {
+    return {
+      url: `https://player.twitch.tv/?channel=${twitchChannelMatch[1]}&parent=${getTwitchParent()}`,
+      type: 'iframe',
+    }
+  }
+
+  const streamableMatch = url.match(/streamable\.com\/([a-zA-Z0-9]+)/)
+  if (streamableMatch) {
+    return { url: `https://streamable.com/e/${streamableMatch[1]}`, type: 'iframe' }
+  }
+
+  const wistiaMatch = url.match(/(?:wistia\.com|wistia\.net)\/(?:medias|embed)\/([a-zA-Z0-9]+)/)
+  if (wistiaMatch) {
+    return { url: `https://fast.wistia.net/embed/iframe/${wistiaMatch[1]}`, type: 'iframe' }
+  }
+
+  const tiktokMatch = url.match(/tiktok\.com\/@[^/]+\/video\/(\d+)/)
+  if (tiktokMatch) {
+    return {
+      url: `https://www.tiktok.com/embed/v2/${tiktokMatch[1]}`,
+      type: 'iframe',
+      aspectRatio: '9/16',
+    }
+  }
+
+  const soundcloudMatch = url.match(/soundcloud\.com\/([a-zA-Z0-9_-]+\/[a-zA-Z0-9_-]+)/)
+  if (soundcloudMatch) {
+    return {
+      url: `https://w.soundcloud.com/player/?url=${encodeURIComponent(url)}&color=%23ff5500&auto_play=false&hide_related=true&show_comments=false&show_user=true&show_reposts=false&show_teaser=false`,
+      type: 'iframe',
+      aspectRatio: '3/2',
+    }
+  }
+
+  const spotifyTrackMatch = url.match(/open\.spotify\.com\/track\/([a-zA-Z0-9]+)/)
+  if (spotifyTrackMatch) {
+    return {
+      url: `https://open.spotify.com/embed/track/${spotifyTrackMatch[1]}`,
+      type: 'iframe',
+      aspectRatio: '3.7/1',
+    }
+  }
+
+  const spotifyAlbumMatch = url.match(/open\.spotify\.com\/album\/([a-zA-Z0-9]+)/)
+  if (spotifyAlbumMatch) {
+    return {
+      url: `https://open.spotify.com/embed/album/${spotifyAlbumMatch[1]}`,
+      type: 'iframe',
+      aspectRatio: '2/3',
+    }
+  }
+
+  const spotifyPlaylistMatch = url.match(/open\.spotify\.com\/playlist\/([a-zA-Z0-9]+)/)
+  if (spotifyPlaylistMatch) {
+    return {
+      url: `https://open.spotify.com/embed/playlist/${spotifyPlaylistMatch[1]}`,
+      type: 'iframe',
+      aspectRatio: '2/3',
+    }
+  }
+
+  const spotifyEpisodeMatch = url.match(/open\.spotify\.com\/episode\/([a-zA-Z0-9]+)/)
+  if (spotifyEpisodeMatch) {
+    return {
+      url: `https://open.spotify.com/embed/episode/${spotifyEpisodeMatch[1]}`,
+      type: 'iframe',
+      aspectRatio: '2.5/1',
+    }
+  }
+
+  const spotifyShowMatch = url.match(/open\.spotify\.com\/show\/([a-zA-Z0-9]+)/)
+  if (spotifyShowMatch) {
+    return {
+      url: `https://open.spotify.com/embed/show/${spotifyShowMatch[1]}`,
+      type: 'iframe',
+      aspectRatio: '3.7/1',
+    }
+  }
+
+  const appleMusicSongMatch = url.match(/music\.apple\.com\/([a-z]{2})\/song\/[^/]+\/(\d+)/)
+  if (appleMusicSongMatch) {
+    const [, country, songId] = appleMusicSongMatch
+    return {
+      url: `https://embed.music.apple.com/${country}/song/${songId}`,
+      type: 'iframe',
+      aspectRatio: '3/2',
+    }
+  }
+
+  const appleMusicAlbumMatch = url.match(/music\.apple\.com\/([a-z]{2})\/album\/(?:[^/]+\/)?(\d+)/)
+  if (appleMusicAlbumMatch) {
+    const [, country, albumId] = appleMusicAlbumMatch
+    return {
+      url: `https://embed.music.apple.com/${country}/album/${albumId}`,
+      type: 'iframe',
+      aspectRatio: '2/3',
+    }
+  }
+
+  const appleMusicPlaylistMatch = url.match(
+    /music\.apple\.com\/([a-z]{2})\/playlist\/[^/]+\/(pl\.[a-zA-Z0-9]+)/
+  )
+  if (appleMusicPlaylistMatch) {
+    const [, country, playlistId] = appleMusicPlaylistMatch
+    return {
+      url: `https://embed.music.apple.com/${country}/playlist/${playlistId}`,
+      type: 'iframe',
+      aspectRatio: '2/3',
+    }
+  }
+
+  const loomMatch = url.match(/loom\.com\/share\/([a-zA-Z0-9]+)/)
+  if (loomMatch) {
+    return { url: `https://www.loom.com/embed/${loomMatch[1]}`, type: 'iframe' }
+  }
+
+  const facebookVideoMatch =
+    url.match(/facebook\.com\/.*\/videos\/(\d+)/) || url.match(/fb\.watch\/([a-zA-Z0-9_-]+)/)
+  if (facebookVideoMatch) {
+    return {
+      url: `https://www.facebook.com/plugins/video.php?href=${encodeURIComponent(url)}&show_text=false`,
+      type: 'iframe',
+    }
+  }
+
+  const instagramReelMatch = url.match(/instagram\.com\/reel\/([a-zA-Z0-9_-]+)/)
+  if (instagramReelMatch) {
+    return {
+      url: `https://www.instagram.com/reel/${instagramReelMatch[1]}/embed`,
+      type: 'iframe',
+      aspectRatio: '9/16',
+    }
+  }
+
+  const instagramPostMatch = url.match(/instagram\.com\/p\/([a-zA-Z0-9_-]+)/)
+  if (instagramPostMatch) {
+    return {
+      url: `https://www.instagram.com/p/${instagramPostMatch[1]}/embed`,
+      type: 'iframe',
+      aspectRatio: '4/5',
+    }
+  }
+
+  const twitterMatch = url.match(/(?:twitter\.com|x\.com)\/[^/]+\/status\/(\d+)/)
+  if (twitterMatch) {
+    return {
+      url: `https://platform.twitter.com/embed/Tweet.html?id=${twitterMatch[1]}`,
+      type: 'iframe',
+      aspectRatio: '3/4',
+    }
+  }
+
+  const rumbleMatch =
+    url.match(/rumble\.com\/embed\/([a-zA-Z0-9]+)/) || url.match(/rumble\.com\/([a-zA-Z0-9]+)-/)
+  if (rumbleMatch) {
+    return { url: `https://rumble.com/embed/${rumbleMatch[1]}/`, type: 'iframe' }
+  }
+
+  const bilibiliMatch = url.match(/bilibili\.com\/video\/(BV[a-zA-Z0-9]+)/)
+  if (bilibiliMatch) {
+    return {
+      url: `https://player.bilibili.com/player.html?bvid=${bilibiliMatch[1]}&high_quality=1`,
+      type: 'iframe',
+    }
+  }
+
+  const vidyardMatch = url.match(/(?:vidyard\.com|share\.vidyard\.com)\/watch\/([a-zA-Z0-9]+)/)
+  if (vidyardMatch) {
+    return { url: `https://play.vidyard.com/${vidyardMatch[1]}`, type: 'iframe' }
+  }
+
+  const cfStreamMatch =
+    url.match(/cloudflarestream\.com\/([a-zA-Z0-9]+)/) ||
+    url.match(/videodelivery\.net\/([a-zA-Z0-9]+)/)
+  if (cfStreamMatch) {
+    return { url: `https://iframe.cloudflarestream.com/${cfStreamMatch[1]}`, type: 'iframe' }
+  }
+
+  const twitchClipMatch =
+    url.match(/clips\.twitch\.tv\/([a-zA-Z0-9_-]+)/) ||
+    url.match(/twitch\.tv\/[^/]+\/clip\/([a-zA-Z0-9_-]+)/)
+  if (twitchClipMatch) {
+    return {
+      url: `https://clips.twitch.tv/embed?clip=${twitchClipMatch[1]}&parent=${getTwitchParent()}`,
+      type: 'iframe',
+    }
+  }
+
+  const mixcloudMatch = url.match(/mixcloud\.com\/([^/]+\/[^/]+)/)
+  if (mixcloudMatch) {
+    return {
+      url: `https://www.mixcloud.com/widget/iframe/?feed=%2F${encodeURIComponent(mixcloudMatch[1])}%2F&hide_cover=1`,
+      type: 'iframe',
+      aspectRatio: '2/1',
+    }
+  }
+
+  const googleDriveMatch = url.match(/drive\.google\.com\/file\/d\/([a-zA-Z0-9_-]+)/)
+  if (googleDriveMatch) {
+    return { url: `https://drive.google.com/file/d/${googleDriveMatch[1]}/preview`, type: 'iframe' }
+  }
+
+  if (url.includes('dropbox.com') && /\.(mp4|mov|webm)/.test(url)) {
+    const directUrl = url
+      .replace('www.dropbox.com', 'dl.dropboxusercontent.com')
+      .replace('?dl=0', '')
+    return { url: directUrl, type: 'video' }
+  }
+
+  const tenorMatch = url.match(/tenor\.com\/view\/[^/]+-(\d+)/)
+  if (tenorMatch) {
+    return { url: `https://tenor.com/embed/${tenorMatch[1]}`, type: 'iframe', aspectRatio: '1/1' }
+  }
+
+  const giphyMatch = url.match(/giphy\.com\/(?:gifs|embed)\/(?:.*-)?([a-zA-Z0-9]+)/)
+  if (giphyMatch) {
+    return { url: `https://giphy.com/embed/${giphyMatch[1]}`, type: 'iframe', aspectRatio: '1/1' }
+  }
+
+  if (/\.(mp4|webm|ogg|mov)(\?|$)/i.test(url)) {
+    return { url, type: 'video' }
+  }
+
+  if (/\.(mp3|wav|m4a|aac)(\?|$)/i.test(url)) {
+    return { url, type: 'audio' }
+  }
+
+  return null
+}
+
+/**
+ * Compact markdown renderer for note blocks with tight spacing
+ */
+const NOTE_REMARK_PLUGINS = [remarkBreaks]
+
+const NOTE_COMPONENTS = {
+  p: ({ children }: { children?: ReactNode }) => (
+    <p className='mb-1 break-words text-[var(--text-primary)] text-sm leading-[1.25rem] last:mb-0'>
+      {children}
+    </p>
+  ),
+  h1: ({ children }: { children?: ReactNode }) => (
+    <h1 className='mt-3 mb-3 break-words font-semibold text-[var(--text-primary)] text-lg first:mt-0'>
+      {children}
+    </h1>
+  ),
+  h2: ({ children }: { children?: ReactNode }) => (
+    <h2 className='mt-2.5 mb-2.5 break-words font-semibold text-[var(--text-primary)] text-base first:mt-0'>
+      {children}
+    </h2>
+  ),
+  h3: ({ children }: { children?: ReactNode }) => (
+    <h3 className='mt-2 mb-2 break-words font-semibold text-[var(--text-primary)] text-sm first:mt-0'>
+      {children}
+    </h3>
+  ),
+  h4: ({ children }: { children?: ReactNode }) => (
+    <h4 className='mt-2 mb-2 break-words font-semibold text-[var(--text-primary)] text-xs first:mt-0'>
+      {children}
+    </h4>
+  ),
+  ul: ({ children }: { children?: ReactNode }) => (
+    <ul className='mt-1 mb-1 list-disc space-y-1 break-words pl-6 text-[var(--text-primary)] text-sm'>
+      {children}
+    </ul>
+  ),
+  ol: ({ children }: { children?: ReactNode }) => (
+    <ol className='mt-1 mb-1 list-decimal space-y-1 break-words pl-6 text-[var(--text-primary)] text-sm'>
+      {children}
+    </ol>
+  ),
+  li: ({ children }: { children?: ReactNode }) => <li className='break-words'>{children}</li>,
+  inlineCode: ({ children }: { children?: ReactNode }) => (
+    <code className='whitespace-normal rounded bg-[var(--surface-5)] px-1 py-0.5 font-mono text-[var(--caution)] text-xs'>
+      {children}
+    </code>
+  ),
+  code: ({ children, className, ...props }: { children?: ReactNode; className?: string }) => (
+    <code
+      {...props}
+      className='block whitespace-pre-wrap break-words rounded bg-[var(--surface-5)] p-2 text-[var(--text-primary)] text-xs'
+    >
+      {children}
+    </code>
+  ),
+  a: ({ href, children }: { href?: string; children?: ReactNode }) => {
+    const embedInfo = href ? getEmbedInfo(href) : null
+    if (embedInfo) {
+      return (
+        <span className='my-2 block w-full'>
+          <a
+            href={href}
+            target='_blank'
+            rel='noopener noreferrer'
+            className='mb-1 block break-all text-[var(--brand-secondary)] underline-offset-2 hover-hover:underline'
+          >
+            {children}
+          </a>
+          <span className='block w-full overflow-hidden rounded-md'>
+            {embedInfo.type === 'iframe' && (
+              <span
+                className='block overflow-hidden'
+                style={{
+                  width: '100%',
+                  aspectRatio: embedInfo.aspectRatio || '16/9',
+                }}
+              >
+                <iframe
+                  src={embedInfo.url}
+                  title='Media'
+                  allow='accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share'
+                  allowFullScreen
+                  loading='lazy'
+                  className='origin-top-left'
+                  style={{
+                    width: EMBED_INVERSE_SCALE,
+                    height: EMBED_INVERSE_SCALE,
+                    transform: `scale(${EMBED_SCALE})`,
+                  }}
+                />
+              </span>
+            )}
+            {embedInfo.type === 'video' && (
+              <video
+                src={embedInfo.url}
+                controls
+                preload='metadata'
+                className='aspect-video w-full'
+              >
+                <track kind='captions' src='' default />
+              </video>
+            )}
+            {embedInfo.type === 'audio' && (
+              <audio src={embedInfo.url} controls preload='metadata' className='w-full'>
+                <track kind='captions' src='' default />
+              </audio>
+            )}
+          </span>
+        </span>
+      )
+    }
+    return (
+      <a
+        href={href}
+        target='_blank'
+        rel='noopener noreferrer'
+        className='break-all text-[var(--brand-secondary)] underline-offset-2 hover-hover:underline'
+      >
+        {children}
+      </a>
+    )
+  },
+  strong: ({ children }: { children?: ReactNode }) => (
+    <strong className='break-words font-semibold text-[var(--text-primary)]'>{children}</strong>
+  ),
+  em: ({ children }: { children?: ReactNode }) => (
+    <em className='break-words text-[var(--text-tertiary)]'>{children}</em>
+  ),
+  blockquote: ({ children }: { children?: ReactNode }) => (
+    <blockquote className='my-4 break-words border-[var(--divider)] border-l-2 pl-4 text-[var(--text-primary)] italic [&>p:first-child]:mt-0 [&>p:last-child]:mb-0 [&>p]:my-2'>
+      {children}
+    </blockquote>
+  ),
+  table: ({ children }: { children?: ReactNode }) => (
+    <div className='my-2 max-w-full overflow-x-auto'>
+      <table className='w-full border-collapse text-xs'>{children}</table>
+    </div>
+  ),
+  thead: ({ children }: { children?: ReactNode }) => (
+    <thead className='border-[var(--border)] border-b'>{children}</thead>
+  ),
+  tbody: ({ children }: { children?: ReactNode }) => <tbody>{children}</tbody>,
+  tr: ({ children }: { children?: ReactNode }) => (
+    <tr className='border-[var(--border)] border-b last:border-b-0'>{children}</tr>
+  ),
+  th: ({ children }: { children?: ReactNode }) => (
+    <th className='px-2 py-1 text-left font-semibold text-[var(--text-primary)]'>{children}</th>
+  ),
+  td: ({ children }: { children?: ReactNode }) => (
+    <td className='px-2 py-1 text-[var(--text-secondary)]'>{children}</td>
+  ),
+}
+
+const NoteMarkdown = memo(function NoteMarkdown({ content }: { content: string }) {
+  return (
+    <Streamdown mode='static' remarkPlugins={NOTE_REMARK_PLUGINS} components={NOTE_COMPONENTS}>
+      {content}
+    </Streamdown>
+  )
+})
+
+/**
+ * Props for the pure note renderer. The container resolves the markdown content
+ * (from the block's subblock value), enabled/ring visual state, and the select
+ * handler; the editor-only action bar is injected via the `actionBar` slot.
+ */
+export interface NoteBlockViewProps {
+  name?: string
+  /** Markdown content; an empty string renders the placeholder. */
+  content: string
+  isEnabled: boolean
+  hasRing: boolean
+  ringStyles: string
+  /** Selects this note in the editor panel. */
+  onSelect: () => void
+  /** Editor-only action bar; omit in read-only / preview contexts. */
+  actionBar?: ReactNode
+}
+
+/**
+ * Pure renderer for a note block: a draggable card with a title and a markdown
+ * body (rich text + embeds). Carries no store, socket, or permission coupling.
+ */
+export function NoteBlockView({
+  name,
+  content,
+  isEnabled,
+  hasRing,
+  ringStyles,
+  onSelect,
+  actionBar,
+}: NoteBlockViewProps) {
+  const isEmpty = content.trim().length === 0
+
+  return (
+    <div className='group relative'>
+      <div
+        role='button'
+        tabIndex={0}
+        className={cn(
+          'note-drag-handle relative z-[20] w-[250px] cursor-grab select-none rounded-lg border border-[var(--border)] bg-[var(--surface-2)] [&:active]:cursor-grabbing'
+        )}
+        onClick={onSelect}
+        onKeyDown={(event) => handleKeyboardActivation(event, onSelect)}
+      >
+        {actionBar}
+
+        <div className='flex items-center justify-between border-[var(--divider)] border-b p-2'>
+          <div className='flex min-w-0 flex-1 items-center'>
+            <span
+              className={cn(
+                'truncate font-medium text-md',
+                !isEnabled && 'text-[var(--text-muted)]'
+              )}
+              title={name}
+            >
+              {name}
+            </span>
+          </div>
+        </div>
+
+        <div className='relative overflow-hidden p-2'>
+          <div className='relative max-w-full break-all'>
+            {isEmpty ? (
+              <p className='text-[var(--text-placeholder)] text-sm'>Add note…</p>
+            ) : (
+              <NoteMarkdown content={content} />
+            )}
+          </div>
+        </div>
+        {hasRing && (
+          <div className={cn('pointer-events-none absolute inset-0 z-40 rounded-lg', ringStyles)} />
+        )}
+      </div>
+    </div>
+  )
+}
diff --git a/packages/workflow-renderer/src/subflow/subflow-node-view.tsx b/packages/workflow-renderer/src/subflow/subflow-node-view.tsx
new file mode 100644
index 00000000000..4e179d0ceff
--- /dev/null
+++ b/packages/workflow-renderer/src/subflow/subflow-node-view.tsx
@@ -0,0 +1,264 @@
+import type { ReactNode } from 'react'
+import { Badge, cn, handleKeyboardActivation } from '@sim/emcn'
+import { RepeatIcon, SplitIcon } from 'lucide-react'
+import { Handle, Position } from 'reactflow'
+import { HANDLE_POSITIONS } from '../dimensions'
+import type { BlockRunStatus, DiffStatus } from '../types'
+
+/** Data attached to loop/parallel container nodes. */
+export interface SubflowNodeData {
+  width?: number
+  height?: number
+  parentId?: string
+  extent?: 'parent'
+  isPreview?: boolean
+  /** Whether this subflow is selected in preview mode. */
+  isPreviewSelected?: boolean
+  kind: 'loop' | 'parallel'
+  name?: string
+  /** Execution status passed by preview/snapshot views. */
+  executionStatus?: 'success' | 'error' | 'not-executed'
+  /** Whether the parent workflow is locked and should render read-only. */
+  isWorkflowLocked?: boolean
+}
+
+/**
+ * Props for the pure subflow (loop/parallel container) renderer.
+ *
+ * Geometry and presentation come from `data`; the state that the editor would
+ * read from stores — enabled/locked flags, focus, execution and diff status,
+ * nesting depth, and edit permission — is resolved by the container and passed
+ * in. The editor-only action bar is injected via the `actionBar` slot so the
+ * pure renderer carries no store, socket, or permission coupling.
+ */
+export interface SubflowNodeViewProps {
+  id: string
+  data: SubflowNodeData
+  /** ReactFlow selection flag. */
+  selected?: boolean
+  isEnabled: boolean
+  isLocked: boolean
+  /** Whether this subflow is the focused block in the editor panel. */
+  isFocused: boolean
+  /** Resolved run-path outcome for the execution ring. */
+  runPathStatus?: BlockRunStatus
+  /** Diff state when comparing workflow versions. */
+  diffStatus?: DiffStatus
+  /** Depth in the parent container hierarchy (drives nesting styling). */
+  nestingLevel: number
+  canEditWorkflow: boolean
+  /** Selects this subflow in the editor panel. */
+  onSelect: () => void
+  /** Editor-only action bar; omit in read-only / preview contexts. */
+  actionBar?: ReactNode
+}
+
+const HANDLE_STYLE = {
+  top: `${HANDLE_POSITIONS.DEFAULT_Y_OFFSET}px`,
+  transform: 'translateY(-50%)',
+} as const
+
+/** Reusable handle classes, matching the workflow-block handle styling. */
+const getHandleClasses = (position: 'left' | 'right') => {
+  const baseClasses = '!z-[10] !cursor-crosshair !border-none !transition-[colors] !duration-150'
+  const colorClasses = '!bg-[var(--workflow-edge)]'
+
+  const positionClasses = {
+    left: '!left-[-8px] !h-5 !w-[7px] !rounded-l-[2px] !rounded-r-none hover-hover:!left-[-11px] hover-hover:!w-[10px] hover-hover:!rounded-l-full',
+    right:
+      '!right-[-8px] !h-5 !w-[7px] !rounded-r-[2px] !rounded-l-none hover-hover:!right-[-11px] hover-hover:!w-[10px] hover-hover:!rounded-r-full',
+  }
+
+  return cn(baseClasses, colorClasses, positionClasses[position])
+}
+
+/**
+ * Pure renderer for loop/parallel execution containers: a resizable container
+ * with a header (icon, name, disabled/locked badges), a start pill with its
+ * source handle, and the left/right connection handles.
+ */
+export function SubflowNodeView({
+  id,
+  data,
+  selected,
+  isEnabled,
+  isLocked,
+  isFocused,
+  runPathStatus,
+  diffStatus,
+  nestingLevel,
+  canEditWorkflow,
+  onSelect,
+  actionBar,
+}: SubflowNodeViewProps) {
+  const isPreview = data?.isPreview || false
+  const isPreviewSelected = data?.isPreviewSelected || false
+  const executionStatus = data.executionStatus
+
+  const startHandleId = data.kind === 'loop' ? 'loop-start-source' : 'parallel-start-source'
+  const endHandleId = data.kind === 'loop' ? 'loop-end-source' : 'parallel-end-source'
+  const BlockIcon = data.kind === 'loop' ? RepeatIcon : SplitIcon
+  const blockIconBg = data.kind === 'loop' ? '#2FB3FF' : '#FEE12B'
+  const blockName = data.name || (data.kind === 'loop' ? 'Loop' : 'Parallel')
+
+  const isSelected = !isPreview && selected
+  const hasRing =
+    isFocused ||
+    isSelected ||
+    isPreviewSelected ||
+    diffStatus === 'new' ||
+    diffStatus === 'edited' ||
+    !!runPathStatus
+
+  /**
+   * Ring color priority: selection (blue) → diff (green/orange) → run-path
+   * (green/red). Uses boxShadow (not outline) so child nodes rendered as
+   * viewport-level siblings by ReactFlow don't clip the parent's ring.
+   */
+  const getRingColor = (): string | undefined => {
+    if (!hasRing) return undefined
+    if (isFocused || isSelected || isPreviewSelected) return 'var(--brand-secondary)'
+    if (diffStatus === 'new') return 'var(--brand-accent)'
+    if (diffStatus === 'edited') return 'var(--warning)'
+    if (runPathStatus === 'success') {
+      return executionStatus ? 'var(--brand-accent)' : 'var(--border-success)'
+    }
+    if (runPathStatus === 'error') return 'var(--text-error)'
+    return undefined
+  }
+  const ringColor = getRingColor()
+
+  return (
+    <div className='group pointer-events-none relative'>
+      <div
+        className='relative select-none rounded-lg border border-[var(--border-1)] transition-block-bg'
+        style={{
+          width: data.width || 500,
+          height: data.height || 300,
+          overflow: 'visible',
+          pointerEvents: 'none',
+          ...(ringColor && {
+            boxShadow: `0 0 0 1.75px ${ringColor}`,
+          }),
+        }}
+        data-node-id={id}
+        data-type='subflowNode'
+        data-nesting-level={nestingLevel}
+        data-subflow-selected={isFocused || isSelected || isPreviewSelected}
+      >
+        {!isPreview && actionBar}
+
+        {/* Header Section */}
+        <div
+          role='button'
+          tabIndex={0}
+          aria-label={`Select ${blockName}`}
+          onClick={onSelect}
+          onKeyDown={(event) => handleKeyboardActivation(event, onSelect)}
+          className='workflow-drag-handle flex cursor-grab items-center justify-between rounded-t-[8px] border-[var(--border)] border-b bg-[var(--surface-2)] py-2 pr-3 pl-2 [&:active]:cursor-grabbing'
+          style={{ pointerEvents: 'auto' }}
+        >
+          <div className='flex min-w-0 flex-1 items-center gap-2.5'>
+            <div
+              className='flex size-[24px] flex-shrink-0 items-center justify-center rounded-md'
+              style={{ backgroundColor: isEnabled ? blockIconBg : 'gray' }}
+            >
+              <BlockIcon className='size-[16px] text-white' />
+            </div>
+            <span
+              className={cn(
+                'truncate font-medium text-md',
+                !isEnabled && 'text-[var(--text-muted)]'
+              )}
+              title={blockName}
+            >
+              {blockName}
+            </span>
+          </div>
+          <div className='flex items-center gap-1'>
+            {!isEnabled && <Badge variant='gray-secondary'>disabled</Badge>}
+            {isLocked && <Badge variant='gray-secondary'>locked</Badge>}
+          </div>
+        </div>
+
+        {/*
+         * Subflow body background. Captures clicks to select the subflow in the
+         * panel editor, matching the header click behavior. Child nodes and edges
+         * are rendered as sibling divs at the viewport level by ReactFlow (not as
+         * DOM children), so enabling pointer events here doesn't block them.
+         */}
+        <div
+          role='button'
+          tabIndex={isPreview ? -1 : 0}
+          aria-label={`Select ${blockName}`}
+          className='workflow-drag-handle absolute inset-0 top-[44px] cursor-grab rounded-b-[8px] [&:active]:cursor-grabbing'
+          style={{ pointerEvents: isPreview ? 'none' : 'auto' }}
+          onClick={onSelect}
+          onKeyDown={(event) => handleKeyboardActivation(event, onSelect)}
+        />
+
+        {!isPreview && canEditWorkflow && (
+          <div
+            role='separator'
+            aria-orientation='horizontal'
+            className='absolute right-[8px] bottom-2 z-20 flex size-[32px] cursor-se-resize items-center justify-center text-muted-foreground'
+            style={{ pointerEvents: 'auto' }}
+          />
+        )}
+
+        <div
+          className='relative h-[calc(100%-50px)] pt-4 pr-[80px] pb-4 pl-4'
+          data-dragarea='true'
+          style={{ pointerEvents: 'none' }}
+        >
+          {/* Subflow Start */}
+          <div
+            className='absolute top-4 left-[16px] flex items-center justify-center rounded-lg border border-[var(--border-1)] bg-[var(--surface-2)] px-3 py-1.5'
+            style={{ pointerEvents: isPreview ? 'none' : 'auto' }}
+            data-parent-id={id}
+            data-node-role={`${data.kind}-start`}
+            data-extent='parent'
+          >
+            <span className='font-medium text-[var(--text-primary)] text-sm'>Start</span>
+
+            <Handle
+              type='source'
+              position={Position.Right}
+              id={startHandleId}
+              className={getHandleClasses('right')}
+              style={{
+                top: '50%',
+                transform: 'translateY(-50%)',
+                pointerEvents: 'auto',
+              }}
+              data-parent-id={id}
+            />
+          </div>
+        </div>
+
+        {/* Input handle on left middle */}
+        <Handle
+          type='target'
+          position={Position.Left}
+          className={getHandleClasses('left')}
+          style={{
+            ...HANDLE_STYLE,
+            pointerEvents: 'auto',
+          }}
+        />
+
+        {/* Output handle on right middle */}
+        <Handle
+          type='source'
+          position={Position.Right}
+          className={getHandleClasses('right')}
+          style={{
+            ...HANDLE_STYLE,
+            pointerEvents: 'auto',
+          }}
+          id={endHandleId}
+        />
+      </div>
+    </div>
+  )
+}
diff --git a/packages/workflow-renderer/src/types.ts b/packages/workflow-renderer/src/types.ts
new file mode 100644
index 00000000000..ec7615fab41
--- /dev/null
+++ b/packages/workflow-renderer/src/types.ts
@@ -0,0 +1,19 @@
+/**
+ * Shared rendering types for the pure workflow renderer.
+ *
+ * These describe the visual state a View component needs, resolved by the
+ * editor (or docs) container and passed in as props. They deliberately carry no
+ * store, socket, or query coupling.
+ */
+
+/** Diff state of an edge when comparing two workflow versions. */
+export type EdgeDiffStatus = 'new' | 'deleted' | 'unchanged' | null
+
+/** Execution outcome of an edge for run-path visualization. */
+export type EdgeRunStatus = 'success' | 'error' | 'not-executed' | undefined
+
+/** Diff state of a block when comparing two workflow versions. */
+export type DiffStatus = 'new' | 'edited' | undefined
+
+/** Execution outcome of a block on its run path. */
+export type BlockRunStatus = 'success' | 'error' | undefined
diff --git a/packages/workflow-renderer/tsconfig.json b/packages/workflow-renderer/tsconfig.json
new file mode 100644
index 00000000000..486f19cfc91
--- /dev/null
+++ b/packages/workflow-renderer/tsconfig.json
@@ -0,0 +1,9 @@
+{
+  "extends": "@sim/tsconfig/library.json",
+  "compilerOptions": {
+    "jsx": "react-jsx",
+    "lib": ["ES2022", "DOM", "DOM.Iterable"]
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
+}