diff --git a/packages/changesets-renovate/src/pnpm-catalogs.ts b/packages/changesets-renovate/src/pnpm-catalogs.ts
new file mode 100644
index 000000000..13ca8e9b3
--- /dev/null
+++ b/packages/changesets-renovate/src/pnpm-catalogs.ts
@@ -0,0 +1,70 @@
+import fs from 'node:fs'
+import path from 'node:path'
+import { execSync } from 'node:child_process'
+import * as yaml from 'js-yaml'
+import glob from 'fast-glob'
+
+const OLD_FILE = 'catalog-old.yaml'
+const NEW_FILE = 'catalog.yaml' // your live catalog
+
+function loadCatalog(filePath) {
+  const content = fs.readFileSync(filePath, 'utf8')
+  const parsed = yaml.load(content)
+  return parsed.catalog || {}
+}
+
+// Step 1: Load catalogs
+const oldCatalog = loadCatalog(OLD_FILE)
+const newCatalog = loadCatalog(NEW_FILE)
+
+// Step 2: Find changed deps
+const changedDeps = Object.entries(newCatalog)
+  .filter(
+    ([pkg, newVersion]) => oldCatalog[pkg] && oldCatalog[pkg] !== newVersion,
+  )
+  .map(([pkg]) => pkg)
+
+if (changedDeps.length === 0) {
+  console.log('✅ No catalog dependency changes.')
+  process.exit(0)
+}
+
+console.log('📦 Changed dependencies:', changedDeps)
+
+// Step 3: Find affected packages
+const packageJsonPaths = glob.sync('packages/*/package.json')
+const affectedPackages = new Set()
+
+for (const pkgJsonPath of packageJsonPaths) {
+  const json = JSON.parse(fs.readFileSync(pkgJsonPath, 'utf-8'))
+  const deps = {
+    ...json.dependencies,
+    ...json.devDependencies,
+    ...json.peerDependencies,
+  }
+
+  for (const dep of changedDeps) {
+    if (deps?.[dep]) {
+      const dirName = path.basename(path.dirname(pkgJsonPath))
+      affectedPackages.add(dirName)
+    }
+  }
+}
+
+if (affectedPackages.size === 0) {
+  console.log('📦 No packages affected by catalog changes.')
+  process.exit(0)
+}
+
+// Step 4: Generate changesets
+for (const pkg of affectedPackages) {
+  console.log(`✏  Creating changeset for ${pkg}...`)
+  execSync(
+    `npx changeset --empty --include=${pkg} --summary="Bump dependency from catalog update"`,
+    {
+      stdio: 'inherit',
+    },
+  )
+}
+
+console.log('✅ Done creating changesets.')