diff --git a/.changeset/chilled-crabs-bow.md b/.changeset/chilled-crabs-bow.md
new file mode 100644
index 00000000000..b508afeeddb
--- /dev/null
+++ b/.changeset/chilled-crabs-bow.md
@@ -0,0 +1,5 @@
+---
+'@primer/react': minor
+---
+
+Modules under an internal export pattern are not able to be imported from outside @primer/react
diff --git a/contributor-docs/adrs/adr-016-internal-modules.md b/contributor-docs/adrs/adr-016-internal-modules.md
index cc91c68e3f3..eadc8c9d053 100644
--- a/contributor-docs/adrs/adr-016-internal-modules.md
+++ b/contributor-docs/adrs/adr-016-internal-modules.md
@@ -5,7 +5,7 @@
 | Stage    | Status |
 | -------- | ------ |
 | Approved | ✅     |
-| Adopted  | 🚧     |
+| Adopted  | ✅     |
 
 ## Context
 
@@ -13,17 +13,17 @@ Currently all files live under the `src` directory. In the `npm` package for `@p
 
 ```json5
 {
-  "exports": {
+  exports: {
     // ...
-    "./lib-esm/*": {
-      "import": [
+    './lib-esm/*': {
+      import: [
         // ...
       ],
-      "require": [
+      require: [
         // ...
-      ]
-    }
-  }
+      ],
+    },
+  },
 }
 ```
 
@@ -37,10 +37,10 @@ In the `"exports"` field of our `npm` package, we can then add the following pat
 
 ```json5
 {
-  "exports": {
+  exports: {
     // ...
-    "./lib-esm/internal/*": null
-  }
+    './lib-esm/internal/*': null,
+  },
 }
 ```
 
@@ -57,7 +57,6 @@ This pattern would remove any files and folders within `src/internal` from the p
 }
 ```
 
-
 ### Impact
 
 - Update the `"exports"` field in `package.json` to exclude `./lib-esm/internal` from usage
diff --git a/generated/components.json b/generated/components.json
index cd2307492bd..5b0b4a5f931 100644
--- a/generated/components.json
+++ b/generated/components.json
@@ -243,6 +243,7 @@
         {
           "name": "direction",
           "type": "'n' | 'ne' | 'e' | 'se' | 's' | 'sw' | 'w' | 'nw'",
+          "defaultValue": "n",
           "description": "Sets where the tooltip renders in relation to the target."
         },
         {
diff --git a/package.json b/package.json
index 9c4f28e2b9f..0f68fa657a0 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,8 @@
         "./lib/*.js",
         "./lib/*/index.js"
       ]
-    }
+    },
+    "./lib-esm/internal/*": null
   },
   "typings": "lib/index.d.ts",
   "sideEffects": false,
diff --git a/src/DataTable/Table.tsx b/src/DataTable/Table.tsx
index b3857e0721e..bfa899e2be2 100644
--- a/src/DataTable/Table.tsx
+++ b/src/DataTable/Table.tsx
@@ -11,7 +11,7 @@ import {Column, CellAlignment} from './column'
 import {UniqueRow} from './row'
 import {SortDirection} from './sorting'
 import {useTableLayout} from './useTable'
-import {useOverflow} from '../hooks/useOverflow'
+import {useOverflow} from '../internal/hooks/useOverflow'
 
 // ----------------------------------------------------------------------------
 // Table
diff --git a/src/PageLayout/PageLayout.tsx b/src/PageLayout/PageLayout.tsx
index 13b181e448e..fe50d009a0b 100644
--- a/src/PageLayout/PageLayout.tsx
+++ b/src/PageLayout/PageLayout.tsx
@@ -8,7 +8,7 @@ import {useSlots} from '../hooks/useSlots'
 import {BetterSystemStyleObject, merge, SxProp} from '../sx'
 import {Theme} from '../ThemeProvider'
 import {canUseDOM} from '../utils/environment'
-import {useOverflow} from '../utils/useOverflow'
+import {useOverflow} from '../internal/hooks/useOverflow'
 import {warning} from '../utils/warning'
 import VisuallyHidden from '../_VisuallyHidden'
 import {useStickyPaneHeight} from './useStickyPaneHeight'
diff --git a/src/hooks/useOverflow.ts b/src/internal/hooks/useOverflow.ts
similarity index 100%
rename from src/hooks/useOverflow.ts
rename to src/internal/hooks/useOverflow.ts
diff --git a/src/utils/useOverflow.ts b/src/utils/useOverflow.ts
deleted file mode 100644
index c54e00a134d..00000000000
--- a/src/utils/useOverflow.ts
+++ /dev/null
@@ -1,24 +0,0 @@
-import {useEffect, useState} from 'react'
-
-export function useOverflow<T extends HTMLElement>(ref: React.RefObject<T>) {
-  const [hasOverflow, setHasOverflow] = useState(false)
-
-  useEffect(() => {
-    if (ref.current === null) return
-
-    const observer = new ResizeObserver(entries => {
-      for (const entry of entries) {
-        setHasOverflow(
-          entry.target.scrollHeight > entry.target.clientHeight || entry.target.scrollWidth > entry.target.clientWidth,
-        )
-      }
-    })
-
-    observer.observe(ref.current)
-    return () => {
-      observer.disconnect()
-    }
-  }, [ref])
-
-  return hasOverflow
-}