fix(seo): correct canonical URLs, compress oversized images, add cache headers (#4168)

* fix(seo): correct canonical URLs, compress oversized images, add cache headers

- Replace all hardcoded https://sim.ai with https://www.sim.ai via SITE_URL constant
- Migrate models, integrations, and homepage metadata from getBaseUrl() to SITE_URL
- Compress 6 blog/landing images from 2.6MB to 300KB total
- Convert mothership cover from PNG to JPEG (1.1MB → 99KB)
- Add Cache-Control headers for static assets (1d max-age, 7d stale-while-revalidate)
- Add SEO regression test scanning all public pages for canonical URL violations

* fix(seo): replace hardcoded URLs with SITE_URL, broaden test detection

- Replace hardcoded https://www.sim.ai with SITE_URL in academy, changelog.xml, and whitelabeling
- Broaden getBaseUrl() detection in SEO test to match any variable name assignment
- Add ee/whitelabeling/metadata.ts to SEO test scan scope

apps/sim/app/(landing)/blog/authors/[id]/page.tsx

@@ -2,6 +2,7 @@ import type { Metadata } from 'next'
 import Image from 'next/image'
 import Link from 'next/link'
 import { getAllPostMeta } from '@/lib/blog/registry'
+import { SITE_URL } from '@/lib/core/utils/urls'
 
 export const revalidate = 3600
 
@@ -17,11 +18,11 @@ export async function generateMetadata({
   return {
     title: `${name} — Sim Blog`,
     description: `Read articles by ${name} on the Sim blog.`,
-    alternates: { canonical: `https://sim.ai/blog/authors/${id}` },
+    alternates: { canonical: `${SITE_URL}/blog/authors/${id}` },
     openGraph: {
       title: `${name} — Sim Blog`,
       description: `Read articles by ${name} on the Sim blog.`,
-      url: `https://sim.ai/blog/authors/${id}`,
+      url: `${SITE_URL}/blog/authors/${id}`,
       siteName: 'Sim',
       type: 'profile',
       ...(author?.avatarUrl
@@ -55,25 +56,25 @@ export default async function AuthorPage({ params }: { params: Promise<{ id: str
       {
         '@type': 'Person',
         name: author.name,
-        url: `https://sim.ai/blog/authors/${author.id}`,
+        url: `${SITE_URL}/blog/authors/${author.id}`,
         sameAs: author.url ? [author.url] : [],
         image: author.avatarUrl,
         worksFor: {
           '@type': 'Organization',
           name: 'Sim',
-          url: 'https://sim.ai',
+          url: SITE_URL,
         },
       },
       {
         '@type': 'BreadcrumbList',
         itemListElement: [
-          { '@type': 'ListItem', position: 1, name: 'Home', item: 'https://sim.ai' },
-          { '@type': 'ListItem', position: 2, name: 'Blog', item: 'https://sim.ai/blog' },
+          { '@type': 'ListItem', position: 1, name: 'Home', item: SITE_URL },
+          { '@type': 'ListItem', position: 2, name: 'Blog', item: `${SITE_URL}/blog` },
           {
             '@type': 'ListItem',
             position: 3,
             name: author.name,
-            item: `https://sim.ai/blog/authors/${author.id}`,
+            item: `${SITE_URL}/blog/authors/${author.id}`,
           },
         ],
       },

apps/sim/app/(landing)/blog/layout.tsx

@@ -1,4 +1,5 @@
 import { getNavBlogPosts } from '@/lib/blog/registry'
+import { SITE_URL } from '@/lib/core/utils/urls'
 import Footer from '@/app/(landing)/components/footer/footer'
 import Navbar from '@/app/(landing)/components/navbar/navbar'
 
@@ -8,10 +9,10 @@ export default async function StudioLayout({ children }: { children: React.React
     '@context': 'https://schema.org',
     '@type': 'Organization',
     name: 'Sim',
-    url: 'https://sim.ai',
+    url: SITE_URL,
     description:
       'Sim is the open-source AI workspace where teams build, deploy, and manage AI agents.',
-    logo: 'https://sim.ai/logo/primary/small.png',
+    logo: `${SITE_URL}/logo/primary/small.png`,
     sameAs: [
       'https://x.com/simdotai',
       'https://github.com/simstudioai/sim',
@@ -23,7 +24,7 @@ export default async function StudioLayout({ children }: { children: React.React
     '@context': 'https://schema.org',
     '@type': 'WebSite',
     name: 'Sim',
-    url: 'https://sim.ai',
+    url: SITE_URL,
   }
 
   return (

apps/sim/app/(landing)/blog/page.tsx

@@ -4,6 +4,7 @@ import Link from 'next/link'
 import { Badge } from '@/components/emcn'
 import { getAllPostMeta } from '@/lib/blog/registry'
 import { buildCollectionPageJsonLd } from '@/lib/blog/seo'
+import { SITE_URL } from '@/lib/core/utils/urls'
 
 export async function generateMetadata({
   searchParams,
@@ -26,7 +27,7 @@ export async function generateMetadata({
   if (tag) canonicalParams.set('tag', tag)
   if (pageNum > 1) canonicalParams.set('page', String(pageNum))
   const qs = canonicalParams.toString()
-  const canonical = `https://sim.ai/blog${qs ? `?${qs}` : ''}`
+  const canonical = `${SITE_URL}/blog${qs ? `?${qs}` : ''}`
 
   return {
     title,
@@ -41,7 +42,7 @@ export async function generateMetadata({
       type: 'website',
       images: [
         {
-          url: 'https://sim.ai/logo/primary/medium.png',
+          url: `${SITE_URL}/logo/primary/medium.png`,
           width: 1200,
           height: 630,
           alt: 'Sim Blog',

apps/sim/app/(landing)/blog/rss.xml/route.ts

@@ -1,12 +1,13 @@
 import { NextResponse } from 'next/server'
 import { getAllPostMeta } from '@/lib/blog/registry'
+import { SITE_URL } from '@/lib/core/utils/urls'
 
 export const revalidate = 3600
 
 export async function GET() {
   const posts = await getAllPostMeta()
   const items = posts.slice(0, 50)
-  const site = 'https://sim.ai'
+  const site = SITE_URL
   const lastBuildDate =
     items.length > 0 ? new Date(items[0].date).toUTCString() : new Date().toUTCString()
 

apps/sim/app/(landing)/blog/sitemap-images.xml/route.ts

@@ -1,11 +1,12 @@
 import { NextResponse } from 'next/server'
 import { getAllPostMeta } from '@/lib/blog/registry'
+import { SITE_URL } from '@/lib/core/utils/urls'
 
 export const revalidate = 3600
 
 export async function GET() {
   const posts = await getAllPostMeta()
-  const base = 'https://sim.ai'
+  const base = SITE_URL
   const xml = `<?xml version="1.0" encoding="UTF-8"?>
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1">
 ${posts

apps/sim/app/(landing)/blog/tags/page.tsx

@@ -1,15 +1,16 @@
 import type { Metadata } from 'next'
 import Link from 'next/link'
 import { getAllTags } from '@/lib/blog/registry'
+import { SITE_URL } from '@/lib/core/utils/urls'
 
 export const metadata: Metadata = {
   title: 'Tags',
   description: 'Browse Sim blog posts by topic — AI agents, workflows, integrations, and more.',
-  alternates: { canonical: 'https://sim.ai/blog/tags' },
+  alternates: { canonical: `${SITE_URL}/blog/tags` },
   openGraph: {
     title: 'Blog Tags | Sim',
     description: 'Browse Sim blog posts by topic — AI agents, workflows, integrations, and more.',
-    url: 'https://sim.ai/blog/tags',
+    url: `${SITE_URL}/blog/tags`,
     siteName: 'Sim',
     locale: 'en_US',
     type: 'website',
@@ -26,9 +27,9 @@ const breadcrumbJsonLd = {
   '@context': 'https://schema.org',
   '@type': 'BreadcrumbList',
   itemListElement: [
-    { '@type': 'ListItem', position: 1, name: 'Home', item: 'https://sim.ai' },
-    { '@type': 'ListItem', position: 2, name: 'Blog', item: 'https://sim.ai/blog' },
-    { '@type': 'ListItem', position: 3, name: 'Tags', item: 'https://sim.ai/blog/tags' },
+    { '@type': 'ListItem', position: 1, name: 'Home', item: SITE_URL },
+    { '@type': 'ListItem', position: 2, name: 'Blog', item: `${SITE_URL}/blog` },
+    { '@type': 'ListItem', position: 3, name: 'Tags', item: `${SITE_URL}/blog/tags` },
   ],
 }
 

apps/sim/app/(landing)/components/structured-data.tsx

@@ -1,3 +1,5 @@
+import { SITE_URL } from '@/lib/core/utils/urls'
+
 /**
  * JSON-LD structured data for the landing page.
  *
@@ -23,22 +25,22 @@ export default function StructuredData() {
     '@graph': [
       {
         '@type': 'Organization',
-        '@id': 'https://sim.ai/#organization',
+        '@id': `${SITE_URL}/#organization`,
         name: 'Sim',
         alternateName: 'Sim Studio',
         description:
           'Sim is the open-source AI workspace where teams build, deploy, and manage AI agents. Connect 1,000+ integrations and every major LLM to create agents that automate real work.',
-        url: 'https://sim.ai',
+        url: SITE_URL,
         logo: {
           '@type': 'ImageObject',
-          '@id': 'https://sim.ai/#logo',
-          url: 'https://sim.ai/logo/b%26w/text/b%26w.svg',
-          contentUrl: 'https://sim.ai/logo/b%26w/text/b%26w.svg',
+          '@id': `${SITE_URL}/#logo`,
+          url: `${SITE_URL}/logo/b%26w/text/b%26w.svg`,
+          contentUrl: `${SITE_URL}/logo/b%26w/text/b%26w.svg`,
           width: 49.78314,
           height: 24.276,
           caption: 'Sim Logo',
         },
-        image: { '@id': 'https://sim.ai/#logo' },
+        image: { '@id': `${SITE_URL}/#logo` },
         sameAs: [
           'https://x.com/simdotai',
           'https://github.com/simstudioai/sim',
@@ -53,44 +55,42 @@ export default function StructuredData() {
       },
       {
         '@type': 'WebSite',
-        '@id': 'https://sim.ai/#website',
-        url: 'https://sim.ai',
+        '@id': `${SITE_URL}/#website`,
+        url: SITE_URL,
         name: 'Sim — The AI Workspace | Build, Deploy & Manage AI Agents',
         description:
           'Sim is the open-source AI workspace where teams build, deploy, and manage AI agents. Connect 1,000+ integrations and every major LLM. Join 100,000+ builders.',
-        publisher: { '@id': 'https://sim.ai/#organization' },
+        publisher: { '@id': `${SITE_URL}/#organization` },
         inLanguage: 'en-US',
       },
       {
         '@type': 'WebPage',
-        '@id': 'https://sim.ai/#webpage',
-        url: 'https://sim.ai',
+        '@id': `${SITE_URL}/#webpage`,
+        url: SITE_URL,
         name: 'Sim — The AI Workspace | Build, Deploy & Manage AI Agents',
-        isPartOf: { '@id': 'https://sim.ai/#website' },
-        about: { '@id': 'https://sim.ai/#software' },
+        isPartOf: { '@id': `${SITE_URL}/#website` },
+        about: { '@id': `${SITE_URL}/#software` },
         datePublished: '2024-01-01T00:00:00+00:00',
         dateModified: new Date().toISOString(),
         description:
           'Sim is the open-source AI workspace where teams build, deploy, and manage AI agents. Connect 1,000+ integrations and every major LLM to create agents that automate real work.',
-        breadcrumb: { '@id': 'https://sim.ai/#breadcrumb' },
+        breadcrumb: { '@id': `${SITE_URL}/#breadcrumb` },
         inLanguage: 'en-US',
         speakable: {
           '@type': 'SpeakableSpecification',
           cssSelector: ['#hero-heading', '[id="hero"] p'],
         },
-        potentialAction: [{ '@type': 'ReadAction', target: ['https://sim.ai'] }],
+        potentialAction: [{ '@type': 'ReadAction', target: [SITE_URL] }],
       },
       {
         '@type': 'BreadcrumbList',
-        '@id': 'https://sim.ai/#breadcrumb',
-        itemListElement: [
-          { '@type': 'ListItem', position: 1, name: 'Home', item: 'https://sim.ai' },
-        ],
+        '@id': `${SITE_URL}/#breadcrumb`,
+        itemListElement: [{ '@type': 'ListItem', position: 1, name: 'Home', item: SITE_URL }],
       },
       {
         '@type': 'WebApplication',
-        '@id': 'https://sim.ai/#software',
-        url: 'https://sim.ai',
+        '@id': `${SITE_URL}/#software`,
+        url: SITE_URL,
         name: 'Sim — The AI Workspace',
         description:
           'Sim is the open-source AI workspace where teams build, deploy, and manage AI agents. Connect 1,000+ integrations and every major LLM to create agents that automate real work — visually, conversationally, or with code. Trusted by over 100,000 builders. SOC2 compliant.',
@@ -98,7 +98,7 @@ export default function StructuredData() {
         applicationSubCategory: 'AI Workspace',
         operatingSystem: 'Web',
         browserRequirements: 'Requires a modern browser with JavaScript enabled',
-        installUrl: 'https://sim.ai/signup',
+        installUrl: `${SITE_URL}/signup`,
         offers: [
           {
             '@type': 'Offer',
@@ -175,16 +175,16 @@ export default function StructuredData() {
       },
       {
         '@type': 'SoftwareSourceCode',
-        '@id': 'https://sim.ai/#source',
+        '@id': `${SITE_URL}/#source`,
         codeRepository: 'https://github.com/simstudioai/sim',
         programmingLanguage: ['TypeScript', 'Python'],
         runtimePlatform: 'Node.js',
         license: 'https://opensource.org/licenses/Apache-2.0',
-        isPartOf: { '@id': 'https://sim.ai/#software' },
+        isPartOf: { '@id': `${SITE_URL}/#software` },
       },
       {
         '@type': 'FAQPage',
-        '@id': 'https://sim.ai/#faq',
+        '@id': `${SITE_URL}/#faq`,
         mainEntity: [
           {
             '@type': 'Question',

apps/sim/app/(landing)/integrations/[slug]/page.tsx

@@ -2,7 +2,7 @@ import type { Metadata } from 'next'
 import Image from 'next/image'
 import Link from 'next/link'
 import { notFound } from 'next/navigation'
-import { getBaseUrl } from '@/lib/core/utils/urls'
+import { SITE_URL } from '@/lib/core/utils/urls'
 import { IntegrationCtaButton } from '@/app/(landing)/integrations/[slug]/components/integration-cta-button'
 import { IntegrationFAQ } from '@/app/(landing)/integrations/[slug]/components/integration-faq'
 import { TemplateCardButton } from '@/app/(landing)/integrations/[slug]/components/template-card-button'
@@ -14,7 +14,7 @@ import { TEMPLATES } from '@/app/workspace/[workspaceId]/home/components/templat
 
 const allIntegrations = integrations as Integration[]
 const INTEGRATION_COUNT = allIntegrations.length
-const baseUrl = getBaseUrl()
+const baseUrl = SITE_URL
 
 /** Fast O(1) lookups — avoids repeated linear scans inside render loops. */
 const bySlug = new Map(allIntegrations.map((i) => [i.slug, i]))

apps/sim/app/(landing)/integrations/layout.tsx

@@ -1,11 +1,11 @@
 import { getNavBlogPosts } from '@/lib/blog/registry'
-import { getBaseUrl } from '@/lib/core/utils/urls'
+import { SITE_URL } from '@/lib/core/utils/urls'
 import Footer from '@/app/(landing)/components/footer/footer'
 import Navbar from '@/app/(landing)/components/navbar/navbar'
 
 export default async function IntegrationsLayout({ children }: { children: React.ReactNode }) {
   const blogPosts = await getNavBlogPosts()
-  const url = getBaseUrl()
+  const url = SITE_URL
   const orgJsonLd = {
     '@context': 'https://schema.org',
     '@type': 'Organization',

apps/sim/app/(landing)/integrations/page.tsx

@@ -1,6 +1,6 @@
 import type { Metadata } from 'next'
 import { Badge } from '@/components/emcn'
-import { getBaseUrl } from '@/lib/core/utils/urls'
+import { SITE_URL } from '@/lib/core/utils/urls'
 import { IntegrationCard } from './components/integration-card'
 import { IntegrationGrid } from './components/integration-grid'
 import { RequestIntegrationModal } from './components/request-integration-modal'
@@ -18,7 +18,7 @@ const INTEGRATION_COUNT = allIntegrations.length
  */
 const TOP_NAMES = [...new Set(POPULAR_WORKFLOWS.flatMap((p) => [p.from, p.to]))].slice(0, 6)
 
-const baseUrl = getBaseUrl()
+const baseUrl = SITE_URL
 
 /** Curated featured integrations — high-recognition services shown as cards. */
 const FEATURED_SLUGS = ['slack', 'notion', 'github', 'gmail'] as const

apps/sim/app/(landing)/layout.tsx

@@ -1,9 +1,10 @@
 import type { Metadata } from 'next'
+import { SITE_URL } from '@/lib/core/utils/urls'
 import { martianMono } from '@/app/_styles/fonts/martian-mono/martian-mono'
 import { season } from '@/app/_styles/fonts/season/season'
 
 export const metadata: Metadata = {
-  metadataBase: new URL('https://sim.ai'),
+  metadataBase: new URL(SITE_URL),
   manifest: '/manifest.webmanifest',
   icons: {
     icon: [{ url: '/icon.svg', type: 'image/svg+xml', sizes: 'any' }],

apps/sim/app/(landing)/models/[provider]/[model]/page.tsx

@@ -1,7 +1,7 @@
 import type { Metadata } from 'next'
 import Link from 'next/link'
 import { notFound } from 'next/navigation'
-import { getBaseUrl } from '@/lib/core/utils/urls'
+import { SITE_URL } from '@/lib/core/utils/urls'
 import { LandingFAQ } from '@/app/(landing)/components/landing-faq'
 import { FeaturedModelCard, ProviderIcon } from '@/app/(landing)/models/components/model-primitives'
 import {
@@ -18,7 +18,7 @@ import {
   getRelatedModels,
 } from '@/app/(landing)/models/utils'
 
-const baseUrl = getBaseUrl()
+const baseUrl = SITE_URL
 
 export async function generateStaticParams() {
   return ALL_CATALOG_MODELS.map((model) => ({
@@ -221,7 +221,7 @@ export default async function ModelPage({
 
           <div className='flex flex-wrap gap-2'>
             <a
-              href='https://sim.ai'
+              href='/'
               className='inline-flex h-[32px] items-center gap-2 rounded-[5px] border border-white bg-white px-2.5 font-season text-black text-sm transition-colors hover:border-[#E0E0E0] hover:bg-[#E0E0E0]'
             >
               Build with this model

apps/sim/app/(landing)/models/[provider]/page.tsx

@@ -2,7 +2,7 @@ import type { Metadata } from 'next'
 import Link from 'next/link'
 import { notFound } from 'next/navigation'
 import { Badge } from '@/components/emcn'
-import { getBaseUrl } from '@/lib/core/utils/urls'
+import { SITE_URL } from '@/lib/core/utils/urls'
 import { LandingFAQ } from '@/app/(landing)/components/landing-faq'
 import {
   ChevronArrow,
@@ -20,7 +20,7 @@ import {
   TOP_MODEL_PROVIDERS,
 } from '@/app/(landing)/models/utils'
 
-const baseUrl = getBaseUrl()
+const baseUrl = SITE_URL
 
 export async function generateStaticParams() {
   return MODEL_PROVIDERS_WITH_CATALOGS.map((provider) => ({

apps/sim/app/(landing)/models/layout.tsx

@@ -1,11 +1,11 @@
 import { getNavBlogPosts } from '@/lib/blog/registry'
-import { getBaseUrl } from '@/lib/core/utils/urls'
+import { SITE_URL } from '@/lib/core/utils/urls'
 import Footer from '@/app/(landing)/components/footer/footer'
 import Navbar from '@/app/(landing)/components/navbar/navbar'
 
 export default async function ModelsLayout({ children }: { children: React.ReactNode }) {
   const blogPosts = await getNavBlogPosts()
-  const url = getBaseUrl()
+  const url = SITE_URL
   const orgJsonLd = {
     '@context': 'https://schema.org',
     '@type': 'Organization',

apps/sim/app/(landing)/models/page.tsx

@@ -1,6 +1,6 @@
 import type { Metadata } from 'next'
 import { Badge } from '@/components/emcn'
-import { getBaseUrl } from '@/lib/core/utils/urls'
+import { SITE_URL } from '@/lib/core/utils/urls'
 import { LandingFAQ } from '@/app/(landing)/components/landing-faq'
 import { ModelComparisonCharts } from '@/app/(landing)/models/components/model-comparison-charts'
 import { ModelDirectory } from '@/app/(landing)/models/components/model-directory'
@@ -17,7 +17,7 @@ import {
   TOTAL_MODELS,
 } from '@/app/(landing)/models/utils'
 
-const baseUrl = getBaseUrl()
+const baseUrl = SITE_URL
 
 const faqItems = [
   {

apps/sim/app/(landing)/partners/page.tsx

@@ -1,5 +1,6 @@
 import type { Metadata } from 'next'
 import { getNavBlogPosts } from '@/lib/blog/registry'
+import { SITE_URL } from '@/lib/core/utils/urls'
 import { martianMono } from '@/app/_styles/fonts/martian-mono/martian-mono'
 import { season } from '@/app/_styles/fonts/season/season'
 import Footer from '@/app/(landing)/components/footer/footer'
@@ -9,7 +10,7 @@ export const metadata: Metadata = {
   title: 'Partner Program',
   description:
     "Join the Sim partner program. Build, deploy, and sell AI agent solutions powered by Sim's AI workspace. Earn your certification through Sim Academy.",
-  metadataBase: new URL('https://sim.ai'),
+  metadataBase: new URL(SITE_URL),
   openGraph: {
     title: 'Partner Program | Sim',
     description: 'Join the Sim partner program.',

apps/sim/app/(landing)/seo.test.ts

@@ -0,0 +1,127 @@
+/**
+ * @vitest-environment node
+ */
+import fs from 'fs'
+import path from 'path'
+import { describe, expect, it } from 'vitest'
+import { SITE_URL } from '@/lib/core/utils/urls'
+
+const SIM_ROOT = path.resolve(__dirname, '..', '..')
+const APP_DIR = path.resolve(SIM_ROOT, 'app')
+const LANDING_DIR = path.resolve(APP_DIR, '(landing)')
+
+/**
+ * All directories containing public-facing pages or SEO-relevant code.
+ * Non-marketing app routes (workspace, chat, form) are excluded —
+ * they legitimately use getBaseUrl() for dynamic, env-dependent URLs.
+ */
+const SEO_SCAN_DIRS = [
+  LANDING_DIR,
+  path.resolve(APP_DIR, 'changelog'),
+  path.resolve(APP_DIR, 'changelog.xml'),
+  path.resolve(APP_DIR, 'academy'),
+  path.resolve(SIM_ROOT, 'lib', 'blog'),
+  path.resolve(SIM_ROOT, 'content', 'blog'),
+]
+
+const SEO_SCAN_INDIVIDUAL_FILES = [
+  path.resolve(APP_DIR, 'page.tsx'),
+  path.resolve(SIM_ROOT, 'ee', 'whitelabeling', 'metadata.ts'),
+]
+
+function collectFiles(dir: string, exts: string[]): string[] {
+  const results: string[] = []
+  if (!fs.existsSync(dir)) return results
+
+  for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
+    const full = path.join(dir, entry.name)
+    if (entry.isDirectory()) {
+      results.push(...collectFiles(full, exts))
+    } else if (exts.some((ext) => entry.name.endsWith(ext)) && !entry.name.includes('.test.')) {
+      results.push(full)
+    }
+  }
+  return results
+}
+
+function getAllSeoFiles(exts: string[]): string[] {
+  const files: string[] = []
+  for (const dir of SEO_SCAN_DIRS) {
+    files.push(...collectFiles(dir, exts))
+  }
+  for (const file of SEO_SCAN_INDIVIDUAL_FILES) {
+    if (fs.existsSync(file)) files.push(file)
+  }
+  return files
+}
+
+describe('SEO canonical URLs', () => {
+  it('SITE_URL equals https://www.sim.ai', () => {
+    expect(SITE_URL).toBe('https://www.sim.ai')
+  })
+
+  it('public pages do not hardcode https://sim.ai (without www)', () => {
+    const files = getAllSeoFiles(['.ts', '.tsx', '.mdx'])
+    const violations: string[] = []
+
+    for (const file of files) {
+      const content = fs.readFileSync(file, 'utf-8')
+      const lines = content.split('\n')
+
+      for (let i = 0; i < lines.length; i++) {
+        const line = lines[i]
+        const hasBareSimAi =
+          line.includes("'https://sim.ai'") ||
+          line.includes("'https://sim.ai/") ||
+          line.includes('"https://sim.ai"') ||
+          line.includes('"https://sim.ai/') ||
+          line.includes('`https://sim.ai/') ||
+          line.includes('`https://sim.ai`') ||
+          line.includes('canonical: https://sim.ai/')
+
+        if (!hasBareSimAi) continue
+
+        const isAllowlisted =
+          line.includes('https://sim.ai/careers') || line.includes('https://sim.ai/discord')
+
+        if (isAllowlisted) continue
+
+        const rel = path.relative(SIM_ROOT, file)
+        violations.push(`${rel}:${i + 1}: ${line.trim()}`)
+      }
+    }
+
+    expect(
+      violations,
+      `Found hardcoded https://sim.ai (without www):\n${violations.join('\n')}`
+    ).toHaveLength(0)
+  })
+
+  it('public pages do not use getBaseUrl() for SEO metadata', () => {
+    const files = getAllSeoFiles(['.ts', '.tsx'])
+    const violations: string[] = []
+
+    for (const file of files) {
+      const content = fs.readFileSync(file, 'utf-8')
+
+      if (!content.includes('getBaseUrl')) continue
+
+      const hasMetadataExport =
+        content.includes('export const metadata') ||
+        content.includes('export async function generateMetadata')
+      const usesGetBaseUrlInMetadata =
+        hasMetadataExport &&
+        (content.includes('= getBaseUrl()') || content.includes('metadataBase: new URL(getBaseUrl'))
+
+      if (usesGetBaseUrlInMetadata) {
+        const rel = path.relative(SIM_ROOT, file)
+        violations.push(rel)
+      }
+    }
+
+    expect(
+      violations,
+      `Public pages should use SITE_URL for metadata, not getBaseUrl():\n${violations.join('\n')}`
+    ).toHaveLength(0)
+  })
+})

apps/sim/app/academy/layout.tsx

@@ -1,6 +1,7 @@
 import type React from 'react'
 import type { Metadata } from 'next'
 import { notFound } from 'next/navigation'
+import { SITE_URL } from '@/lib/core/utils/urls'
 
 // TODO: Remove notFound() call to make academy pages public once content is ready
 const ACADEMY_ENABLED = false
@@ -12,7 +13,7 @@ export const metadata: Metadata = {
   },
   description:
     'Become a certified Sim partner — learn to build, integrate, and deploy AI workflows.',
-  metadataBase: new URL('https://sim.ai'),
+  metadataBase: new URL(SITE_URL),
   openGraph: {
     title: 'Sim Academy',
     description: 'Become a certified Sim partner.',

apps/sim/app/changelog.xml/route.ts

@@ -1,4 +1,5 @@
 import { NextResponse } from 'next/server'
+import { SITE_URL } from '@/lib/core/utils/urls'
 
 export const dynamic = 'force-static'
 export const revalidate = 3600
@@ -48,7 +49,7 @@ export async function GET() {
       <rss version="2.0">
         <channel>
           <title>Sim Changelog</title>
-          <link>https://sim.ai/changelog</link>
+          <link>${SITE_URL}/changelog</link>
           <description>Latest changes, fixes and updates in Sim.</description>
           <language>en-us</language>
           ${items}

apps/sim/app/changelog/page.tsx

@@ -1,9 +1,11 @@
 import type { Metadata } from 'next'
+import { SITE_URL } from '@/lib/core/utils/urls'
 import ChangelogContent from '@/app/changelog/components/changelog-content'
 
 export const metadata: Metadata = {
   title: 'Changelog',
   description: 'Stay up-to-date with the latest features, improvements, and bug fixes in Sim.',
+  alternates: { canonical: `${SITE_URL}/changelog` },
   openGraph: {
     title: 'Changelog',
     description: 'Stay up-to-date with the latest features, improvements, and bug fixes in Sim.',

apps/sim/app/page.tsx

@@ -1,13 +1,11 @@
 import type { Metadata } from 'next'
-import { getBaseUrl } from '@/lib/core/utils/urls'
+import { SITE_URL } from '@/lib/core/utils/urls'
 import Landing from '@/app/(landing)/landing'
 
 export const revalidate = 3600
 
-const baseUrl = getBaseUrl()
-
 export const metadata: Metadata = {
-  metadataBase: new URL(baseUrl),
+  metadataBase: new URL(SITE_URL),
   title: {
     absolute: 'Sim — The AI Workspace | Build, Deploy & Manage AI Agents',
   },
@@ -28,7 +26,7 @@ export const metadata: Metadata = {
     description:
       'Sim is the open-source AI workspace where teams build, deploy, and manage AI agents. Connect 1,000+ integrations and every major LLM to create agents that automate real work — visually, conversationally, or with code.',
     type: 'website',
-    url: baseUrl,
+    url: SITE_URL,
     siteName: 'Sim',
     locale: 'en_US',
     images: [
@@ -54,10 +52,10 @@ export const metadata: Metadata = {
     },
   },
   alternates: {
-    canonical: baseUrl,
+    canonical: SITE_URL,
     languages: {
-      'en-US': baseUrl,
-      'x-default': baseUrl,
+      'en-US': SITE_URL,
+      'x-default': SITE_URL,
     },
   },
   robots: {

apps/sim/content/blog/copilot/index.mdx

@@ -12,7 +12,7 @@ ogImage: /blog/copilot/cover.png
 ogAlt: 'Sim Copilot technical overview'
 about: ['AI Assistants', 'Agentic Workflows', 'Retrieval Augmented Generation']
 timeRequired: PT7M
-canonical: https://sim.ai/blog/copilot
+canonical: https://www.sim.ai/blog/copilot
 featured: false
 draft: true
 ---

apps/sim/content/blog/emcn/index.mdx

@@ -12,7 +12,7 @@ ogImage: /blog/emcn/cover.png
 ogAlt: 'Emcn design system cover'
 about: ['Design Systems', 'Component Libraries', 'Design Tokens', 'Accessibility']
 timeRequired: PT6M
-canonical: https://sim.ai/blog/emcn
+canonical: https://www.sim.ai/blog/emcn
 featured: false
 draft: true
 ---

apps/sim/content/blog/enterprise/index.mdx

@@ -12,7 +12,7 @@ ogImage: /blog/enterprise/cover.png
 ogAlt: 'Sim Enterprise features overview'
 about: ['Enterprise Software', 'Security', 'Compliance', 'Self-Hosting']
 timeRequired: PT10M
-canonical: https://sim.ai/blog/enterprise
+canonical: https://www.sim.ai/blog/enterprise
 featured: true
 draft: false
 ---

apps/sim/content/blog/executor/index.mdx

@@ -12,7 +12,7 @@ ogImage: /blog/executor/cover.png
 ogAlt: 'Sim Executor technical overview'
 about: ['Execution', 'Workflow Orchestration']
 timeRequired: PT12M
-canonical: https://sim.ai/blog/executor
+canonical: https://www.sim.ai/blog/executor
 featured: false
 draft: false
 ---

apps/sim/content/blog/mothership/index.mdx

@@ -8,11 +8,11 @@ authors:
   - emir
 readingTime: 10
 tags: [Release, Mothership, Tables, Knowledge Base, Connectors, RAG, Sim]
-ogImage: /blog/mothership/cover.png
+ogImage: /blog/mothership/cover.jpg
 ogAlt: 'Sim v0.6 release announcement'
 about: ['AI Agents', 'Workflow Automation', 'Developer Tools']
 timeRequired: PT10M
-canonical: https://sim.ai/blog/mothership
+canonical: https://www.sim.ai/blog/mothership
 featured: true
 draft: false
 ---

apps/sim/content/blog/multiplayer/index.mdx

@@ -9,7 +9,7 @@ authors:
 readingTime: 12
 tags: [Multiplayer, Realtime, Collaboration, WebSockets, Architecture]
 ogImage: /blog/multiplayer/cover.png
-canonical: https://sim.ai/blog/multiplayer
+canonical: https://www.sim.ai/blog/multiplayer
 draft: false
 ---
 

apps/sim/content/blog/openai-vs-n8n-vs-sim/index.mdx

@@ -9,7 +9,7 @@ authors:
 readingTime: 9
 tags: [AI Agents, Workflow Automation, OpenAI AgentKit, n8n, Sim, MCP]
 ogImage: /blog/openai-vs-n8n-vs-sim/workflow.png
-canonical: https://sim.ai/blog/openai-vs-n8n-vs-sim
+canonical: https://www.sim.ai/blog/openai-vs-n8n-vs-sim
 draft: false
 ---
 

apps/sim/content/blog/series-a/index.mdx

@@ -13,7 +13,7 @@ ogImage: /blog/series-a/cover.png
 ogAlt: 'Sim team photo in front of neon logo'
 about: ['Artificial Intelligence', 'Agentic Workflows', 'Startups', 'Funding']
 timeRequired: PT4M
-canonical: https://sim.ai/blog/series-a
+canonical: https://www.sim.ai/blog/series-a
 featured: true
 draft: false
 ---

apps/sim/content/blog/v0-5/index.mdx

@@ -12,7 +12,7 @@ ogImage: /blog/v0-5/cover.png
 ogAlt: 'Sim v0.5 release announcement'
 about: ['AI Agents', 'Workflow Automation', 'Developer Tools']
 timeRequired: PT8M
-canonical: https://sim.ai/blog/v0-5
+canonical: https://www.sim.ai/blog/v0-5
 featured: true
 draft: false
 ---

apps/sim/ee/whitelabeling/metadata.ts

@@ -1,5 +1,5 @@
 import type { Metadata } from 'next'
-import { getBaseUrl } from '@/lib/core/utils/urls'
+import { getBaseUrl, SITE_URL } from '@/lib/core/utils/urls'
 import { getBrandConfig } from '@/ee/whitelabeling/branding'
 
 /**
@@ -150,7 +150,7 @@ export function generateStructuredData() {
     creator: {
       '@type': 'Organization',
       name: 'Sim',
-      url: 'https://sim.ai',
+      url: SITE_URL,
     },
     featureList: [
       'AI Workspace for Teams',

apps/sim/lib/blog/seo.ts

@@ -1,5 +1,6 @@
 import type { Metadata } from 'next'
 import type { BlogMeta } from '@/lib/blog/schema'
+import { SITE_URL } from '@/lib/core/utils/urls'
 
 export function buildPostMetadata(post: BlogMeta): Metadata {
   const base = new URL(post.canonical)
@@ -85,10 +86,10 @@ export function buildArticleJsonLd(post: BlogMeta) {
     publisher: {
       '@type': 'Organization',
       name: 'Sim',
-      url: 'https://sim.ai',
+      url: SITE_URL,
       logo: {
         '@type': 'ImageObject',
-        url: 'https://sim.ai/logo/primary/medium.png',
+        url: `${SITE_URL}/logo/primary/medium.png`,
       },
     },
     mainEntityOfPage: {
@@ -112,8 +113,8 @@ export function buildBreadcrumbJsonLd(post: BlogMeta) {
   return {
     '@type': 'BreadcrumbList',
     itemListElement: [
-      { '@type': 'ListItem', position: 1, name: 'Home', item: 'https://sim.ai' },
-      { '@type': 'ListItem', position: 2, name: 'Blog', item: 'https://sim.ai/blog' },
+      { '@type': 'ListItem', position: 1, name: 'Home', item: SITE_URL },
+      { '@type': 'ListItem', position: 2, name: 'Blog', item: `${SITE_URL}/blog` },
       { '@type': 'ListItem', position: 3, name: post.title, item: post.canonical },
     ],
   }
@@ -150,22 +151,22 @@ export function buildCollectionPageJsonLd() {
     '@context': 'https://schema.org',
     '@type': 'CollectionPage',
     name: 'Sim Blog',
-    url: 'https://sim.ai/blog',
+    url: `${SITE_URL}/blog`,
     description: 'Announcements, insights, and guides for building AI agents.',
     publisher: {
       '@type': 'Organization',
       name: 'Sim',
-      url: 'https://sim.ai',
+      url: SITE_URL,
       logo: {
         '@type': 'ImageObject',
-        url: 'https://sim.ai/logo/primary/medium.png',
+        url: `${SITE_URL}/logo/primary/medium.png`,
       },
     },
     inLanguage: 'en-US',
     isPartOf: {
       '@type': 'WebSite',
       name: 'Sim',
-      url: 'https://sim.ai',
+      url: SITE_URL,
     },
   }
 }

apps/sim/lib/core/utils/urls.ts

@@ -1,6 +1,9 @@
 import { getEnv } from '@/lib/core/config/env'
 import { isProd } from '@/lib/core/config/feature-flags'
 
+/** Canonical base URL for the public-facing marketing site. No trailing slash. */
+export const SITE_URL = 'https://www.sim.ai'
+
 function hasHttpProtocol(url: string): boolean {
   return /^https?:\/\//i.test(url)
 }

apps/sim/next.config.ts

@@ -149,6 +149,15 @@ const nextConfig: NextConfig = {
   ],
   async headers() {
     return [
+      {
+        source: '/:all*(svg|jpg|jpeg|png|gif|ico|webp|avif|woff|woff2|ttf|eot)',
+        headers: [
+          {
+            key: 'Cache-Control',
+            value: 'public, max-age=86400, stale-while-revalidate=604800',
+          },
+        ],
+      },
       {
         source: '/.well-known/:path*',
         headers: [
@@ -386,12 +395,12 @@ const nextConfig: NextConfig = {
     redirects.push(
       {
         source: '/building/:path*',
-        destination: 'https://sim.ai/blog/:path*',
+        destination: 'https://www.sim.ai/blog/:path*',
         permanent: true,
       },
       {
         source: '/studio/:path*',
-        destination: 'https://sim.ai/blog/:path*',
+        destination: 'https://www.sim.ai/blog/:path*',
         permanent: true,
       }
     )