feat(library): add n8n alternatives, LangGraph alternatives, and open-source AI agent platform listings

apps/sim/lib/content/registry-factory.ts

@@ -2,6 +2,7 @@ import fs from 'fs/promises'
 import path from 'path'
 import { cache } from 'react'
 import matter from 'gray-matter'
+import { imageSize } from 'image-size'
 import { compileMDX } from 'next-mdx-remote/rsc'
 import rehypeAutolinkHeadings from 'rehype-autolink-headings'
 import rehypeSlug from 'rehype-slug'
@@ -89,6 +90,25 @@ export function createContentRegistry(config: ContentRegistryConfig): ContentReg
     return loadAuthorsForDir(authorsDir)
   }
 
+  /**
+   * Reads the intrinsic pixel dimensions of a local `public/` OG image so the
+   * SEO builders can declare accurate `og:image` and JSON-LD sizes. Returns
+   * null for remote URLs or unreadable files, in which case the builders fall
+   * back to the 1200x630 OG default.
+   */
+  async function readOgImageDimensions(
+    ogImage: string
+  ): Promise<{ width: number; height: number } | null> {
+    if (ogImage.startsWith('http')) return null
+    try {
+      const buffer = await fs.readFile(path.join(process.cwd(), 'public', ogImage))
+      const { width, height } = imageSize(buffer)
+      return width && height ? { width, height } : null
+    } catch {
+      return null
+    }
+  }
+
   async function scanFrontmatters(): Promise<ContentMeta[]> {
     if (cachedMeta) {
       return cachedMeta
@@ -119,6 +139,7 @@ export function createContentRegistry(config: ContentRegistryConfig): ContentReg
           .filter((w) => w.length > 0).length
         const authors = fm.authors.map((id) => authorsMap[id]).filter(Boolean)
         if (authors.length === 0) throw new Error(`Authors not found for "${slug}"`)
+        const ogImageDimensions = await readOgImageDimensions(fm.ogImage)
         return {
           slug: fm.slug,
           title: fm.title,
@@ -130,6 +151,8 @@ export function createContentRegistry(config: ContentRegistryConfig): ContentReg
           readingTime: fm.readingTime,
           tags: fm.tags,
           ogImage: fm.ogImage,
+          ogImageWidth: ogImageDimensions?.width,
+          ogImageHeight: ogImageDimensions?.height,
           canonical: fm.canonical,
           ogAlt: fm.ogAlt,
           about: fm.about,

apps/sim/lib/content/schema.ts

@@ -58,6 +58,10 @@ export interface ContentMeta {
   readingTime?: number
   tags: string[]
   ogImage: string
+  /** Intrinsic pixel width of a local `ogImage`, probed at scan time; absent for remote or unreadable images. */
+  ogImageWidth?: number
+  /** Intrinsic pixel height of a local `ogImage`, probed at scan time; absent for remote or unreadable images. */
+  ogImageHeight?: number
   ogAlt?: string
   about?: string[]
   timeRequired?: string

apps/sim/lib/content/seo.ts

@@ -50,8 +50,8 @@ export function buildPostMetadata(post: ContentMeta): Metadata {
       images: [
         {
           url: post.ogImage.startsWith('http') ? post.ogImage : `${baseUrl}${post.ogImage}`,
-          width: 1200,
-          height: 630,
+          width: post.ogImageWidth ?? 1200,
+          height: post.ogImageHeight ?? 630,
           alt: post.ogAlt || post.title,
         },
       ],
@@ -83,8 +83,8 @@ export function buildArticleJsonLd(post: ContentMeta) {
       {
         '@type': 'ImageObject',
         url: post.ogImage,
-        width: 1200,
-        height: 630,
+        width: post.ogImageWidth ?? 1200,
+        height: post.ogImageHeight ?? 630,
         caption: post.ogAlt || post.title,
       },
     ],

apps/sim/package.json

@@ -153,6 +153,7 @@
     "groq-sdk": "^0.15.0",
     "html-to-text": "^9.0.5",
     "idb-keyval": "6.2.2",
+    "image-size": "1.2.1",
     "imapflow": "1.2.4",
     "input-otp": "^1.4.2",
     "ioredis": "^5.6.0",