diff --git a/.changeset/cold-dancers-fix.md b/.changeset/cold-dancers-fix.md
new file mode 100644
index 0000000000..887e35cf92
--- /dev/null
+++ b/.changeset/cold-dancers-fix.md
@@ -0,0 +1,5 @@
+---
+"shadcn": patch
+---
+
+handle cn-\* class transformation in non-className contexts
diff --git a/packages/shadcn/src/styles/transform-style-map.test.ts b/packages/shadcn/src/styles/transform-style-map.test.ts
index 880e6bd46b..c72faa8b8b 100644
--- a/packages/shadcn/src/styles/transform-style-map.test.ts
+++ b/packages/shadcn/src/styles/transform-style-map.test.ts
@@ -1027,4 +1027,162 @@ function Menu({ className, ...props }: React.ComponentProps<"div">) {
       "
     `)
   })
+
+  it("applies styles to cn-* classes in object properties (toastOptions pattern)", async () => {
+    const source = `import * as React from "react"
+import { Toaster as Sonner } from "sonner"
+
+const Toaster = ({ ...props }) => {
+  return (
+    <Sonner
+      toastOptions={{
+        classNames: {
+          toast: "cn-toast",
+        },
+      }}
+      {...props}
+    />
+  )
+}
+`
+
+    const styleMap: StyleMap = {
+      "cn-toast": "rounded-2xl",
+    }
+
+    const result = await applyTransform(source, styleMap)
+
+    expect(result).toMatchInlineSnapshot(`
+      "import * as React from "react"
+      import { Toaster as Sonner } from "sonner"
+
+      const Toaster = ({ ...props }) => {
+        return (
+          <Sonner
+            toastOptions={{
+              classNames: {
+                toast: "rounded-2xl",
+              },
+            }}
+            {...props}
+          />
+        )
+      }
+      "
+    `)
+  })
+
+  it("applies styles to cn-* classes in deeply nested object properties", async () => {
+    const source = `import * as React from "react"
+
+const config = {
+  options: {
+    classNames: {
+      wrapper: "cn-wrapper existing-class",
+      inner: "cn-inner",
+    },
+  },
+}
+`
+
+    const styleMap: StyleMap = {
+      "cn-wrapper": "flex flex-col",
+      "cn-inner": "p-4 rounded-lg",
+    }
+
+    const result = await applyTransform(source, styleMap)
+
+    expect(result).toMatchInlineSnapshot(`
+      "import * as React from "react"
+
+      const config = {
+        options: {
+          classNames: {
+            wrapper: "flex flex-col existing-class",
+            inner: "p-4 rounded-lg",
+          },
+        },
+      }
+      "
+    `)
+  })
+
+  it("removes cn-* classes from object properties when not in styleMap", async () => {
+    const source = `import * as React from "react"
+
+const config = {
+  classNames: {
+    item: "cn-unknown-class existing-class",
+  },
+}
+`
+
+    const styleMap: StyleMap = {}
+
+    const result = await applyTransform(source, styleMap)
+
+    expect(result).toMatchInlineSnapshot(`
+      "import * as React from "react"
+
+      const config = {
+        classNames: {
+          item: "existing-class",
+        },
+      }
+      "
+    `)
+  })
+
+  it("preserves allowlisted cn-* classes in object properties", async () => {
+    const source = `import * as React from "react"
+
+const config = {
+  classNames: {
+    target: "cn-menu-target",
+  },
+}
+`
+
+    const styleMap: StyleMap = {
+      "cn-menu-target": "z-50 origin-top",
+    }
+
+    const result = await applyTransform(source, styleMap)
+
+    expect(result).toMatchInlineSnapshot(`
+      "import * as React from "react"
+
+      const config = {
+        classNames: {
+          target: "cn-menu-target",
+        },
+      }
+      "
+    `)
+  })
+
+  it("handles multiple cn-* classes in object property values", async () => {
+    const source = `import * as React from "react"
+
+const options = {
+  toast: "cn-toast cn-toast-content extra-class",
+}
+`
+
+    const styleMap: StyleMap = {
+      "cn-toast": "rounded-lg",
+      "cn-toast-content": "p-4",
+    }
+
+    const result = await applyTransform(source, styleMap)
+
+    expect(result).toMatchInlineSnapshot(`
+      "import * as React from "react"
+
+      const options = {
+        toast: "rounded-lg p-4 extra-class",
+      }
+      "
+    `)
+  })
 })
diff --git a/packages/shadcn/src/styles/transform-style-map.ts b/packages/shadcn/src/styles/transform-style-map.ts
index da43772f8a..914ea819cf 100644
--- a/packages/shadcn/src/styles/transform-style-map.ts
+++ b/packages/shadcn/src/styles/transform-style-map.ts
@@ -41,6 +41,7 @@ export const transformStyleMap: TransformerStyle<SourceFile> = async ({
   applyToCvaCalls(sourceFile, styleMap, matchedClasses)
   applyToClassNameAttributes(sourceFile, styleMap, matchedClasses)
   applyToMergePropsCalls(sourceFile, styleMap, matchedClasses)
+  applyToAllStringLiterals(sourceFile, styleMap)
 
   return sourceFile
 }
@@ -288,11 +289,6 @@ function extractCnClasses(str: string) {
   return Array.from(matches, (match) => match[0])
 }
 
-function extractCnClass(str: string) {
-  const classes = extractCnClasses(str)
-  return classes[0] ?? null
-}
-
 function removeCnClasses(str: string) {
   return str
     .replace(/\bcn-[\w-]+\b/g, (match) => {
@@ -606,3 +602,69 @@ function applyClassesToCnCall(
     cnCall.replaceWithText(`cn(${updatedArguments.join(", ")})`)
   }
 }
+
+function isInAlreadyProcessedContext(node: Node): boolean {
+  let current = node.getParent()
+
+  while (current) {
+    if (Node.isCallExpression(current)) {
+      const expression = current.getExpression()
+      if (Node.isIdentifier(expression)) {
+        const name = expression.getText()
+        if (name === "cn" || name === "cva") {
+          return true
+        }
+      }
+    }
+
+    if (Node.isJsxAttribute(current)) {
+      const attrName = current.getNameNode().getText()
+      if (attrName === "className") {
+        return true
+      }
+    }
+
+    current = current.getParent()
+  }
+
+  return false
+}
+
+function applyToAllStringLiterals(sourceFile: SourceFile, styleMap: StyleMap) {
+  sourceFile.forEachDescendant((node) => {
+    if (!isStringLiteralLike(node)) {
+      return
+    }
+
+    if (isInAlreadyProcessedContext(node)) {
+      return
+    }
+
+    const stringValue = node.getLiteralText()
+    const cnClasses = extractCnClasses(stringValue)
+
+    if (cnClasses.length === 0) {
+      return
+    }
+
+    // Skip allowlisted classes — they are handled at CLI install time.
+    const classesToInline = cnClasses.filter(
+      (cnClass) => !ALLOWLIST.has(cnClass)
+    )
+
+    const tailwindClassesToApply = classesToInline
+      .map((cnClass) => styleMap[cnClass])
+      .filter((classes): classes is string => Boolean(classes))
+
+    if (tailwindClassesToApply.length > 0) {
+      const mergedClasses = tailwindClassesToApply.join(" ")
+      const updated = removeCnClasses(mergeClasses(mergedClasses, stringValue))
+      node.setLiteralValue(updated)
+    } else {
+      const updated = removeCnClasses(stringValue)
+      if (updated !== stringValue) {
+        node.setLiteralValue(updated)
+      }
+    }
+  })
+}