diff --git a/docs/components/icon.md b/docs/components/icon.md
index 399f76c4a7..ce792f4d71 100644
--- a/docs/components/icon.md
+++ b/docs/components/icon.md
@@ -146,7 +146,7 @@ Token                               | Default value
 `--md-icon-size`                    | `24px`
 `--md-icon-weight`                  | `400`
 
-*   [All tokens](https://github.com/material-components/material-web/blob/main/icon/lib/_md-comp-icon.scss)
+*   [All tokens](https://github.com/material-components/material-web/blob/main/icon/internal/_md-comp-icon.scss)
     <!-- {.external} -->
 
 ### Example
diff --git a/labs/badge/_badge.scss b/labs/badge/_badge.scss
index 68279888f7..e778213b50 100644
--- a/labs/badge/_badge.scss
+++ b/labs/badge/_badge.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/badge' show theme;
+@forward './internal/badge' show theme;
diff --git a/labs/badge/badge.ts b/labs/badge/badge.ts
index 67772c2caa..4486991c85 100644
--- a/labs/badge/badge.ts
+++ b/labs/badge/badge.ts
@@ -6,8 +6,8 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {Badge} from './lib/badge.js';
-import {styles} from './lib/badge-styles.css.js';
+import {Badge} from './internal/badge.js';
+import {styles} from './internal/badge-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/labs/badge/lib/_badge.scss b/labs/badge/internal/_badge.scss
similarity index 100%
rename from labs/badge/lib/_badge.scss
rename to labs/badge/internal/_badge.scss
diff --git a/labs/badge/lib/badge-styles.scss b/labs/badge/internal/badge-styles.scss
similarity index 100%
rename from labs/badge/lib/badge-styles.scss
rename to labs/badge/internal/badge-styles.scss
diff --git a/labs/badge/lib/badge.ts b/labs/badge/internal/badge.ts
similarity index 100%
rename from labs/badge/lib/badge.ts
rename to labs/badge/internal/badge.ts
diff --git a/labs/navigationbar/_navigation-bar.scss b/labs/navigationbar/_navigation-bar.scss
index 18d401f1bf..4cd62fc9e8 100644
--- a/labs/navigationbar/_navigation-bar.scss
+++ b/labs/navigationbar/_navigation-bar.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/navigation-bar' show theme;
+@forward './internal/navigation-bar' show theme;
diff --git a/labs/navigationbar/harness.ts b/labs/navigationbar/harness.ts
index be95da2211..d4312ef16d 100644
--- a/labs/navigationbar/harness.ts
+++ b/labs/navigationbar/harness.ts
@@ -7,7 +7,7 @@
 import {Harness} from '../../testing/harness.js';
 import {NavigationTabHarness} from '../navigationtab/harness.js';
 
-import {NavigationBar} from './lib/navigation-bar.js';
+import {NavigationBar} from './internal/navigation-bar.js';
 
 /**
  * Test harness for navigation bars.
diff --git a/labs/navigationbar/lib/_navigation-bar.scss b/labs/navigationbar/internal/_navigation-bar.scss
similarity index 100%
rename from labs/navigationbar/lib/_navigation-bar.scss
rename to labs/navigationbar/internal/_navigation-bar.scss
diff --git a/labs/navigationbar/lib/constants.ts b/labs/navigationbar/internal/constants.ts
similarity index 86%
rename from labs/navigationbar/lib/constants.ts
rename to labs/navigationbar/internal/constants.ts
index 5c26c51001..3e5c2aad86 100644
--- a/labs/navigationbar/lib/constants.ts
+++ b/labs/navigationbar/internal/constants.ts
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {NavigationTabState} from '../../navigationtab/lib/state.js';
+import {NavigationTabState} from '../../navigationtab/internal/state.js';
 
 /**
  * MDCNavigationTabInteractionEventDetail provides details for the interaction
diff --git a/labs/navigationbar/lib/navigation-bar-styles.scss b/labs/navigationbar/internal/navigation-bar-styles.scss
similarity index 100%
rename from labs/navigationbar/lib/navigation-bar-styles.scss
rename to labs/navigationbar/internal/navigation-bar-styles.scss
diff --git a/labs/navigationbar/lib/navigation-bar.ts b/labs/navigationbar/internal/navigation-bar.ts
similarity index 98%
rename from labs/navigationbar/lib/navigation-bar.ts
rename to labs/navigationbar/internal/navigation-bar.ts
index c0131f4a34..c73b01bdb2 100644
--- a/labs/navigationbar/lib/navigation-bar.ts
+++ b/labs/navigationbar/internal/navigation-bar.ts
@@ -12,7 +12,7 @@ import {property, queryAssignedElements} from 'lit/decorators.js';
 import {ARIAMixinStrict} from '../../../internal/aria/aria.js';
 import {requestUpdateOnAriaChange} from '../../../internal/aria/delegate.js';
 import {isRtl} from '../../../internal/controller/is-rtl.js';
-import {NavigationTab} from '../../navigationtab/lib/navigation-tab.js';
+import {NavigationTab} from '../../navigationtab/internal/navigation-tab.js';
 
 import {NavigationTabInteractionEvent} from './constants.js';
 import {NavigationBarState} from './state.js';
diff --git a/labs/navigationbar/lib/state.ts b/labs/navigationbar/internal/state.ts
similarity index 85%
rename from labs/navigationbar/lib/state.ts
rename to labs/navigationbar/internal/state.ts
index 20033a3259..955ee832ed 100644
--- a/labs/navigationbar/lib/state.ts
+++ b/labs/navigationbar/internal/state.ts
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import {NavigationTabState} from '../../navigationtab/lib/state.js';
+import {NavigationTabState} from '../../navigationtab/internal/state.js';
 
 /**
  * The state of a navigation Bar.
diff --git a/labs/navigationbar/navigation-bar.ts b/labs/navigationbar/navigation-bar.ts
index 3c628993a8..34eb346ed9 100644
--- a/labs/navigationbar/navigation-bar.ts
+++ b/labs/navigationbar/navigation-bar.ts
@@ -6,8 +6,8 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {NavigationBar} from './lib/navigation-bar.js';
-import {styles} from './lib/navigation-bar-styles.css.js';
+import {NavigationBar} from './internal/navigation-bar.js';
+import {styles} from './internal/navigation-bar-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/labs/navigationdrawer/_navigation-drawer-modal.scss b/labs/navigationdrawer/_navigation-drawer-modal.scss
index 6d52e0c978..fe46ad2056 100644
--- a/labs/navigationdrawer/_navigation-drawer-modal.scss
+++ b/labs/navigationdrawer/_navigation-drawer-modal.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/navigation-drawer-modal' show theme;
+@forward './internal/navigation-drawer-modal' show theme;
diff --git a/labs/navigationdrawer/_navigation-drawer.scss b/labs/navigationdrawer/_navigation-drawer.scss
index 99e222d28b..72d0463745 100644
--- a/labs/navigationdrawer/_navigation-drawer.scss
+++ b/labs/navigationdrawer/_navigation-drawer.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/navigation-drawer' show theme;
+@forward './internal/navigation-drawer' show theme;
diff --git a/labs/navigationdrawer/lib/_navigation-drawer-modal.scss b/labs/navigationdrawer/internal/_navigation-drawer-modal.scss
similarity index 100%
rename from labs/navigationdrawer/lib/_navigation-drawer-modal.scss
rename to labs/navigationdrawer/internal/_navigation-drawer-modal.scss
diff --git a/labs/navigationdrawer/lib/_navigation-drawer.scss b/labs/navigationdrawer/internal/_navigation-drawer.scss
similarity index 100%
rename from labs/navigationdrawer/lib/_navigation-drawer.scss
rename to labs/navigationdrawer/internal/_navigation-drawer.scss
diff --git a/labs/navigationdrawer/lib/_shared.scss b/labs/navigationdrawer/internal/_shared.scss
similarity index 100%
rename from labs/navigationdrawer/lib/_shared.scss
rename to labs/navigationdrawer/internal/_shared.scss
diff --git a/labs/navigationdrawer/lib/navigation-drawer-modal-styles.scss b/labs/navigationdrawer/internal/navigation-drawer-modal-styles.scss
similarity index 100%
rename from labs/navigationdrawer/lib/navigation-drawer-modal-styles.scss
rename to labs/navigationdrawer/internal/navigation-drawer-modal-styles.scss
diff --git a/labs/navigationdrawer/lib/navigation-drawer-modal.ts b/labs/navigationdrawer/internal/navigation-drawer-modal.ts
similarity index 100%
rename from labs/navigationdrawer/lib/navigation-drawer-modal.ts
rename to labs/navigationdrawer/internal/navigation-drawer-modal.ts
diff --git a/labs/navigationdrawer/lib/navigation-drawer-styles.scss b/labs/navigationdrawer/internal/navigation-drawer-styles.scss
similarity index 100%
rename from labs/navigationdrawer/lib/navigation-drawer-styles.scss
rename to labs/navigationdrawer/internal/navigation-drawer-styles.scss
diff --git a/labs/navigationdrawer/lib/navigation-drawer.ts b/labs/navigationdrawer/internal/navigation-drawer.ts
similarity index 100%
rename from labs/navigationdrawer/lib/navigation-drawer.ts
rename to labs/navigationdrawer/internal/navigation-drawer.ts
diff --git a/labs/navigationdrawer/lib/shared-styles.scss b/labs/navigationdrawer/internal/shared-styles.scss
similarity index 100%
rename from labs/navigationdrawer/lib/shared-styles.scss
rename to labs/navigationdrawer/internal/shared-styles.scss
diff --git a/labs/navigationdrawer/navigation-drawer-modal.ts b/labs/navigationdrawer/navigation-drawer-modal.ts
index 9740b044b1..59d579077b 100644
--- a/labs/navigationdrawer/navigation-drawer-modal.ts
+++ b/labs/navigationdrawer/navigation-drawer-modal.ts
@@ -6,9 +6,9 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {NavigationDrawerModal} from './lib/navigation-drawer-modal.js';
-import {styles} from './lib/navigation-drawer-modal-styles.css.js';
-import {styles as sharedStyles} from './lib/shared-styles.css.js';
+import {NavigationDrawerModal} from './internal/navigation-drawer-modal.js';
+import {styles} from './internal/navigation-drawer-modal-styles.css.js';
+import {styles as sharedStyles} from './internal/shared-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/labs/navigationdrawer/navigation-drawer.ts b/labs/navigationdrawer/navigation-drawer.ts
index 3584c66195..57bd5e822f 100644
--- a/labs/navigationdrawer/navigation-drawer.ts
+++ b/labs/navigationdrawer/navigation-drawer.ts
@@ -6,9 +6,9 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {NavigationDrawer} from './lib/navigation-drawer.js';
-import {styles} from './lib/navigation-drawer-styles.css.js';
-import {styles as sharedStyles} from './lib/shared-styles.css.js';
+import {NavigationDrawer} from './internal/navigation-drawer.js';
+import {styles} from './internal/navigation-drawer-styles.css.js';
+import {styles as sharedStyles} from './internal/shared-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/labs/navigationtab/_navigation-tab.scss b/labs/navigationtab/_navigation-tab.scss
index 5bc6ad8002..44aa860ec6 100644
--- a/labs/navigationtab/_navigation-tab.scss
+++ b/labs/navigationtab/_navigation-tab.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/navigation-tab' show theme;
+@forward './internal/navigation-tab' show theme;
diff --git a/labs/navigationtab/harness.ts b/labs/navigationtab/harness.ts
index 7345d13576..dad5e8a319 100644
--- a/labs/navigationtab/harness.ts
+++ b/labs/navigationtab/harness.ts
@@ -6,7 +6,7 @@
 
 import {Harness} from '../../testing/harness.js';
 
-import {NavigationTab} from './lib/navigation-tab.js';
+import {NavigationTab} from './internal/navigation-tab.js';
 
 /**
  * Test harness for navigation tab elements.
diff --git a/labs/navigationtab/lib/_navigation-tab.scss b/labs/navigationtab/internal/_navigation-tab.scss
similarity index 100%
rename from labs/navigationtab/lib/_navigation-tab.scss
rename to labs/navigationtab/internal/_navigation-tab.scss
diff --git a/labs/navigationtab/lib/navigation-tab-styles.scss b/labs/navigationtab/internal/navigation-tab-styles.scss
similarity index 100%
rename from labs/navigationtab/lib/navigation-tab-styles.scss
rename to labs/navigationtab/internal/navigation-tab-styles.scss
diff --git a/labs/navigationtab/lib/navigation-tab.ts b/labs/navigationtab/internal/navigation-tab.ts
similarity index 100%
rename from labs/navigationtab/lib/navigation-tab.ts
rename to labs/navigationtab/internal/navigation-tab.ts
diff --git a/labs/navigationtab/lib/state.ts b/labs/navigationtab/internal/state.ts
similarity index 100%
rename from labs/navigationtab/lib/state.ts
rename to labs/navigationtab/internal/state.ts
diff --git a/labs/navigationtab/navigation-tab.ts b/labs/navigationtab/navigation-tab.ts
index 943eb03d03..d72ed68db3 100644
--- a/labs/navigationtab/navigation-tab.ts
+++ b/labs/navigationtab/navigation-tab.ts
@@ -6,8 +6,8 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {NavigationTab} from './lib/navigation-tab.js';
-import {styles} from './lib/navigation-tab-styles.css.js';
+import {NavigationTab} from './internal/navigation-tab.js';
+import {styles} from './internal/navigation-tab-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/labs/segmentedbutton/lib/_outlined-segmented-button.scss b/labs/segmentedbutton/internal/_outlined-segmented-button.scss
similarity index 100%
rename from labs/segmentedbutton/lib/_outlined-segmented-button.scss
rename to labs/segmentedbutton/internal/_outlined-segmented-button.scss
diff --git a/labs/segmentedbutton/lib/_shared.scss b/labs/segmentedbutton/internal/_shared.scss
similarity index 100%
rename from labs/segmentedbutton/lib/_shared.scss
rename to labs/segmentedbutton/internal/_shared.scss
diff --git a/labs/segmentedbutton/lib/outlined-segmented-button.ts b/labs/segmentedbutton/internal/outlined-segmented-button.ts
similarity index 100%
rename from labs/segmentedbutton/lib/outlined-segmented-button.ts
rename to labs/segmentedbutton/internal/outlined-segmented-button.ts
diff --git a/labs/segmentedbutton/lib/outlined-styles.scss b/labs/segmentedbutton/internal/outlined-styles.scss
similarity index 100%
rename from labs/segmentedbutton/lib/outlined-styles.scss
rename to labs/segmentedbutton/internal/outlined-styles.scss
diff --git a/labs/segmentedbutton/lib/segmented-button.ts b/labs/segmentedbutton/internal/segmented-button.ts
similarity index 100%
rename from labs/segmentedbutton/lib/segmented-button.ts
rename to labs/segmentedbutton/internal/segmented-button.ts
diff --git a/labs/segmentedbutton/lib/shared-styles.scss b/labs/segmentedbutton/internal/shared-styles.scss
similarity index 100%
rename from labs/segmentedbutton/lib/shared-styles.scss
rename to labs/segmentedbutton/internal/shared-styles.scss
diff --git a/labs/segmentedbutton/outlined-segmented-button.ts b/labs/segmentedbutton/outlined-segmented-button.ts
index 3862d9d1fe..e04a70b0b5 100644
--- a/labs/segmentedbutton/outlined-segmented-button.ts
+++ b/labs/segmentedbutton/outlined-segmented-button.ts
@@ -6,9 +6,9 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {OutlinedSegmentedButton} from './lib/outlined-segmented-button.js';
-import {styles as outlinedStyles} from './lib/outlined-styles.css.js';
-import {styles as sharedStyles} from './lib/shared-styles.css.js';
+import {OutlinedSegmentedButton} from './internal/outlined-segmented-button.js';
+import {styles as outlinedStyles} from './internal/outlined-styles.css.js';
+import {styles as sharedStyles} from './internal/shared-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/labs/segmentedbuttonset/lib/_outlined-segmented-button-set.scss b/labs/segmentedbuttonset/internal/_outlined-segmented-button-set.scss
similarity index 100%
rename from labs/segmentedbuttonset/lib/_outlined-segmented-button-set.scss
rename to labs/segmentedbuttonset/internal/_outlined-segmented-button-set.scss
diff --git a/labs/segmentedbuttonset/lib/_shared.scss b/labs/segmentedbuttonset/internal/_shared.scss
similarity index 100%
rename from labs/segmentedbuttonset/lib/_shared.scss
rename to labs/segmentedbuttonset/internal/_shared.scss
diff --git a/labs/segmentedbuttonset/lib/outlined-segmented-button-set.ts b/labs/segmentedbuttonset/internal/outlined-segmented-button-set.ts
similarity index 100%
rename from labs/segmentedbuttonset/lib/outlined-segmented-button-set.ts
rename to labs/segmentedbuttonset/internal/outlined-segmented-button-set.ts
diff --git a/labs/segmentedbuttonset/lib/outlined-styles.scss b/labs/segmentedbuttonset/internal/outlined-styles.scss
similarity index 100%
rename from labs/segmentedbuttonset/lib/outlined-styles.scss
rename to labs/segmentedbuttonset/internal/outlined-styles.scss
diff --git a/labs/segmentedbuttonset/lib/segmented-button-set.ts b/labs/segmentedbuttonset/internal/segmented-button-set.ts
similarity index 97%
rename from labs/segmentedbuttonset/lib/segmented-button-set.ts
rename to labs/segmentedbuttonset/internal/segmented-button-set.ts
index 2fa303f315..e83c51cbf4 100644
--- a/labs/segmentedbuttonset/lib/segmented-button-set.ts
+++ b/labs/segmentedbuttonset/internal/segmented-button-set.ts
@@ -9,7 +9,7 @@ import {property, queryAssignedElements} from 'lit/decorators.js';
 
 import {ARIAMixinStrict} from '../../../internal/aria/aria.js';
 import {requestUpdateOnAriaChange} from '../../../internal/aria/delegate.js';
-import {SegmentedButton} from '../../segmentedbutton/lib/segmented-button.js';
+import {SegmentedButton} from '../../segmentedbutton/internal/segmented-button.js';
 
 /**
  * SegmentedButtonSet is the parent component for two or more
diff --git a/labs/segmentedbuttonset/lib/shared-styles.scss b/labs/segmentedbuttonset/internal/shared-styles.scss
similarity index 100%
rename from labs/segmentedbuttonset/lib/shared-styles.scss
rename to labs/segmentedbuttonset/internal/shared-styles.scss
diff --git a/labs/segmentedbuttonset/outlined-segmented-button-set.ts b/labs/segmentedbuttonset/outlined-segmented-button-set.ts
index 85a2263f8d..e7e5efaa3c 100644
--- a/labs/segmentedbuttonset/outlined-segmented-button-set.ts
+++ b/labs/segmentedbuttonset/outlined-segmented-button-set.ts
@@ -6,9 +6,9 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {OutlinedSegmentedButtonSet} from './lib/outlined-segmented-button-set.js';
-import {styles as outlinedStyles} from './lib/outlined-styles.css.js';
-import {styles as sharedStyles} from './lib/shared-styles.css.js';
+import {OutlinedSegmentedButtonSet} from './internal/outlined-segmented-button-set.js';
+import {styles as outlinedStyles} from './internal/outlined-styles.css.js';
+import {styles as sharedStyles} from './internal/shared-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/progress/_circular-progress.scss b/progress/_circular-progress.scss
index 5d9f12b1b9..3f09022f1b 100644
--- a/progress/_circular-progress.scss
+++ b/progress/_circular-progress.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/circular-progress' show theme;
+@forward './internal/circular-progress' show theme;
diff --git a/progress/_linear-progress.scss b/progress/_linear-progress.scss
index b1e87f05ea..a6c8d1c961 100644
--- a/progress/_linear-progress.scss
+++ b/progress/_linear-progress.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/linear-progress' show theme;
+@forward './internal/linear-progress' show theme;
diff --git a/progress/circular-progress.ts b/progress/circular-progress.ts
index d31bd6067f..b943dc9134 100644
--- a/progress/circular-progress.ts
+++ b/progress/circular-progress.ts
@@ -6,8 +6,8 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {CircularProgress} from './lib/circular-progress.js';
-import {styles} from './lib/circular-progress-styles.css.js';
+import {CircularProgress} from './internal/circular-progress.js';
+import {styles} from './internal/circular-progress-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/progress/harness.ts b/progress/harness.ts
index 6fbd381c20..317bdf9fce 100644
--- a/progress/harness.ts
+++ b/progress/harness.ts
@@ -6,8 +6,8 @@
 
 import {Harness} from '../testing/harness.js';
 
-import {CircularProgress} from './lib/circular-progress.js';
-import {LinearProgress} from './lib/linear-progress.js';
+import {CircularProgress} from './internal/circular-progress.js';
+import {LinearProgress} from './internal/linear-progress.js';
 
 /**
  * Test harness for linear-progress.
diff --git a/progress/lib/_circular-progress.scss b/progress/internal/_circular-progress.scss
similarity index 100%
rename from progress/lib/_circular-progress.scss
rename to progress/internal/_circular-progress.scss
diff --git a/progress/lib/_linear-progress.scss b/progress/internal/_linear-progress.scss
similarity index 100%
rename from progress/lib/_linear-progress.scss
rename to progress/internal/_linear-progress.scss
diff --git a/progress/lib/circular-progress-styles.scss b/progress/internal/circular-progress-styles.scss
similarity index 100%
rename from progress/lib/circular-progress-styles.scss
rename to progress/internal/circular-progress-styles.scss
diff --git a/progress/lib/circular-progress.ts b/progress/internal/circular-progress.ts
similarity index 100%
rename from progress/lib/circular-progress.ts
rename to progress/internal/circular-progress.ts
diff --git a/progress/lib/linear-progress-styles.scss b/progress/internal/linear-progress-styles.scss
similarity index 100%
rename from progress/lib/linear-progress-styles.scss
rename to progress/internal/linear-progress-styles.scss
diff --git a/progress/lib/linear-progress.ts b/progress/internal/linear-progress.ts
similarity index 100%
rename from progress/lib/linear-progress.ts
rename to progress/internal/linear-progress.ts
diff --git a/progress/lib/progress.ts b/progress/internal/progress.ts
similarity index 100%
rename from progress/lib/progress.ts
rename to progress/internal/progress.ts
diff --git a/progress/linear-progress.ts b/progress/linear-progress.ts
index 9b408af8de..a5953ca8e0 100644
--- a/progress/linear-progress.ts
+++ b/progress/linear-progress.ts
@@ -6,8 +6,8 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {LinearProgress} from './lib/linear-progress.js';
-import {styles} from './lib/linear-progress-styles.css.js';
+import {LinearProgress} from './internal/linear-progress.js';
+import {styles} from './internal/linear-progress-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/radio/_radio.scss b/radio/_radio.scss
index 108a83440d..5b7c78bfb4 100644
--- a/radio/_radio.scss
+++ b/radio/_radio.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/radio' show theme;
+@forward './internal/radio' show theme;
diff --git a/radio/harness.ts b/radio/harness.ts
index 679bd78512..3e6f1b429b 100644
--- a/radio/harness.ts
+++ b/radio/harness.ts
@@ -6,7 +6,7 @@
 
 import {Harness} from '../testing/harness.js';
 
-import {Radio} from './lib/radio.js';
+import {Radio} from './internal/radio.js';
 
 /**
  * Test harness for radio.
diff --git a/radio/lib/_radio.scss b/radio/internal/_radio.scss
similarity index 100%
rename from radio/lib/_radio.scss
rename to radio/internal/_radio.scss
diff --git a/radio/lib/forced-colors-styles.scss b/radio/internal/forced-colors-styles.scss
similarity index 100%
rename from radio/lib/forced-colors-styles.scss
rename to radio/internal/forced-colors-styles.scss
diff --git a/radio/lib/radio-styles.scss b/radio/internal/radio-styles.scss
similarity index 100%
rename from radio/lib/radio-styles.scss
rename to radio/internal/radio-styles.scss
diff --git a/radio/lib/radio.ts b/radio/internal/radio.ts
similarity index 100%
rename from radio/lib/radio.ts
rename to radio/internal/radio.ts
diff --git a/radio/lib/single-selection-controller.ts b/radio/internal/single-selection-controller.ts
similarity index 100%
rename from radio/lib/single-selection-controller.ts
rename to radio/internal/single-selection-controller.ts
diff --git a/radio/radio.ts b/radio/radio.ts
index 2aee7077cb..1eabfd3c65 100644
--- a/radio/radio.ts
+++ b/radio/radio.ts
@@ -6,9 +6,9 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {styles as forcedColorsStyles} from './lib/forced-colors-styles.css.js';
-import {Radio} from './lib/radio.js';
-import {styles} from './lib/radio-styles.css.js';
+import {styles as forcedColorsStyles} from './internal/forced-colors-styles.css.js';
+import {Radio} from './internal/radio.js';
+import {styles} from './internal/radio-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/ripple/_ripple.scss b/ripple/_ripple.scss
index b352f0cde5..29623c48ea 100644
--- a/ripple/_ripple.scss
+++ b/ripple/_ripple.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/ripple' show theme;
+@forward './internal/ripple' show theme;
diff --git a/ripple/lib/_ripple.scss b/ripple/internal/_ripple.scss
similarity index 100%
rename from ripple/lib/_ripple.scss
rename to ripple/internal/_ripple.scss
diff --git a/ripple/lib/ripple-styles.scss b/ripple/internal/ripple-styles.scss
similarity index 100%
rename from ripple/lib/ripple-styles.scss
rename to ripple/internal/ripple-styles.scss
diff --git a/ripple/lib/ripple.ts b/ripple/internal/ripple.ts
similarity index 100%
rename from ripple/lib/ripple.ts
rename to ripple/internal/ripple.ts
diff --git a/ripple/lib/ripple_test.ts b/ripple/internal/ripple_test.ts
similarity index 100%
rename from ripple/lib/ripple_test.ts
rename to ripple/internal/ripple_test.ts
diff --git a/ripple/ripple.ts b/ripple/ripple.ts
index cb7f587b1b..7a446de51d 100644
--- a/ripple/ripple.ts
+++ b/ripple/ripple.ts
@@ -6,8 +6,8 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {Ripple} from './lib/ripple.js';
-import {styles} from './lib/ripple-styles.css.js';
+import {Ripple} from './internal/ripple.js';
+import {styles} from './internal/ripple-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/select/_filled-select.scss b/select/_filled-select.scss
index 42dd6d7797..d5f6cd1a58 100644
--- a/select/_filled-select.scss
+++ b/select/_filled-select.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/filled-select' show theme;
+@forward './internal/filled-select' show theme;
diff --git a/select/_outlined-select.scss b/select/_outlined-select.scss
index a05d39250e..5af14e1464 100644
--- a/select/_outlined-select.scss
+++ b/select/_outlined-select.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/outlined-select' show theme;
+@forward './internal/outlined-select' show theme;
diff --git a/select/filled-select.ts b/select/filled-select.ts
index 157021a6d4..6bcd1baa10 100644
--- a/select/filled-select.ts
+++ b/select/filled-select.ts
@@ -6,10 +6,10 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {styles as filledForcedColorsStyles} from './lib/filled-forced-colors-styles.css.js';
-import {FilledSelect} from './lib/filled-select.js';
-import {styles} from './lib/filled-select-styles.css.js';
-import {styles as sharedStyles} from './lib/shared-styles.css.js';
+import {styles as filledForcedColorsStyles} from './internal/filled-forced-colors-styles.css.js';
+import {FilledSelect} from './internal/filled-select.js';
+import {styles} from './internal/filled-select-styles.css.js';
+import {styles as sharedStyles} from './internal/shared-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/select/harness.ts b/select/harness.ts
index 8f2bce1ef1..e2e364d0cd 100644
--- a/select/harness.ts
+++ b/select/harness.ts
@@ -10,8 +10,8 @@ import {FieldHarness} from '../field/harness.js';
 import {Field} from '../field/internal/field.js';
 import {Harness} from '../testing/harness.js';
 
-import {Select} from './lib/select.js';
-import {SelectOptionHarness} from './lib/selectoption/harness.js';
+import {Select} from './internal/select.js';
+import {SelectOptionHarness} from './internal/selectoption/harness.js';
 
 /**
  * Test harness for menu.
diff --git a/select/lib/_filled-select.scss b/select/internal/_filled-select.scss
similarity index 100%
rename from select/lib/_filled-select.scss
rename to select/internal/_filled-select.scss
diff --git a/select/lib/_outlined-select.scss b/select/internal/_outlined-select.scss
similarity index 100%
rename from select/lib/_outlined-select.scss
rename to select/internal/_outlined-select.scss
diff --git a/select/lib/_shared.scss b/select/internal/_shared.scss
similarity index 100%
rename from select/lib/_shared.scss
rename to select/internal/_shared.scss
diff --git a/select/lib/filled-forced-colors-styles.scss b/select/internal/filled-forced-colors-styles.scss
similarity index 100%
rename from select/lib/filled-forced-colors-styles.scss
rename to select/internal/filled-forced-colors-styles.scss
diff --git a/select/lib/filled-select-styles.scss b/select/internal/filled-select-styles.scss
similarity index 100%
rename from select/lib/filled-select-styles.scss
rename to select/internal/filled-select-styles.scss
diff --git a/select/lib/filled-select.ts b/select/internal/filled-select.ts
similarity index 100%
rename from select/lib/filled-select.ts
rename to select/internal/filled-select.ts
diff --git a/select/lib/outlined-forced-colors-styles.scss b/select/internal/outlined-forced-colors-styles.scss
similarity index 100%
rename from select/lib/outlined-forced-colors-styles.scss
rename to select/internal/outlined-forced-colors-styles.scss
diff --git a/select/lib/outlined-select-styles.scss b/select/internal/outlined-select-styles.scss
similarity index 100%
rename from select/lib/outlined-select-styles.scss
rename to select/internal/outlined-select-styles.scss
diff --git a/select/lib/outlined-select.ts b/select/internal/outlined-select.ts
similarity index 100%
rename from select/lib/outlined-select.ts
rename to select/internal/outlined-select.ts
diff --git a/select/lib/select.ts b/select/internal/select.ts
similarity index 100%
rename from select/lib/select.ts
rename to select/internal/select.ts
diff --git a/select/lib/selectoption/harness.ts b/select/internal/selectoption/harness.ts
similarity index 100%
rename from select/lib/selectoption/harness.ts
rename to select/internal/selectoption/harness.ts
diff --git a/select/lib/selectoption/select-option.ts b/select/internal/selectoption/select-option.ts
similarity index 100%
rename from select/lib/selectoption/select-option.ts
rename to select/internal/selectoption/select-option.ts
diff --git a/select/lib/shared-styles.scss b/select/internal/shared-styles.scss
similarity index 100%
rename from select/lib/shared-styles.scss
rename to select/internal/shared-styles.scss
diff --git a/select/lib/shared.ts b/select/internal/shared.ts
similarity index 100%
rename from select/lib/shared.ts
rename to select/internal/shared.ts
diff --git a/select/outlined-select.ts b/select/outlined-select.ts
index 2ddae2b431..05b25e8f80 100644
--- a/select/outlined-select.ts
+++ b/select/outlined-select.ts
@@ -6,10 +6,10 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {styles as outlinedForcedColorsStyles} from './lib/outlined-forced-colors-styles.css.js';
-import {OutlinedSelect} from './lib/outlined-select.js';
-import {styles} from './lib/outlined-select-styles.css.js';
-import {styles as sharedStyles} from './lib/shared-styles.css.js';
+import {styles as outlinedForcedColorsStyles} from './internal/outlined-forced-colors-styles.css.js';
+import {OutlinedSelect} from './internal/outlined-select.js';
+import {styles} from './internal/outlined-select-styles.css.js';
+import {styles as sharedStyles} from './internal/shared-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/select/select-option.ts b/select/select-option.ts
index f6196cb268..7b3c252f31 100644
--- a/select/select-option.ts
+++ b/select/select-option.ts
@@ -12,7 +12,7 @@ import {styles as forcedColorsStyles} from '../menu/internal/menuitem/forced-col
 import {styles} from '../menu/internal/menuitem/menu-item-styles.css.js';
 
 // TODO(b/236285090): update with HCM best practices
-import {SelectOptionEl} from './lib/selectoption/select-option.js';
+import {SelectOptionEl} from './internal/selectoption/select-option.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/slider/_slider.scss b/slider/_slider.scss
index a43959d424..052eb44d87 100644
--- a/slider/_slider.scss
+++ b/slider/_slider.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/slider' show theme;
+@forward './internal/slider' show theme;
diff --git a/slider/harness.ts b/slider/harness.ts
index 24134d92db..59215c3399 100644
--- a/slider/harness.ts
+++ b/slider/harness.ts
@@ -6,7 +6,7 @@
 
 import {Harness} from '../testing/harness.js';
 
-import {Slider} from './lib/slider.js';
+import {Slider} from './internal/slider.js';
 
 /**
  * Test harness for slider.
diff --git a/slider/lib/_slider.scss b/slider/internal/_slider.scss
similarity index 100%
rename from slider/lib/_slider.scss
rename to slider/internal/_slider.scss
diff --git a/slider/lib/forced-colors-styles.scss b/slider/internal/forced-colors-styles.scss
similarity index 100%
rename from slider/lib/forced-colors-styles.scss
rename to slider/internal/forced-colors-styles.scss
diff --git a/slider/lib/slider-styles.scss b/slider/internal/slider-styles.scss
similarity index 100%
rename from slider/lib/slider-styles.scss
rename to slider/internal/slider-styles.scss
diff --git a/slider/lib/slider.ts b/slider/internal/slider.ts
similarity index 100%
rename from slider/lib/slider.ts
rename to slider/internal/slider.ts
diff --git a/slider/slider.ts b/slider/slider.ts
index 1ebc475933..dd20bf09b4 100644
--- a/slider/slider.ts
+++ b/slider/slider.ts
@@ -6,9 +6,9 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {styles as forcedColorsStyles} from './lib/forced-colors-styles.css.js';
-import {Slider} from './lib/slider.js';
-import {styles} from './lib/slider-styles.css.js';
+import {styles as forcedColorsStyles} from './internal/forced-colors-styles.css.js';
+import {Slider} from './internal/slider.js';
+import {styles} from './internal/slider-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/switch/_switch.scss b/switch/_switch.scss
index f3cc7b6ec2..bc50d9781d 100644
--- a/switch/_switch.scss
+++ b/switch/_switch.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/switch' show theme;
+@forward './internal/switch' show theme;
diff --git a/switch/harness.ts b/switch/harness.ts
index 94a3bd4790..8b424ce65d 100644
--- a/switch/harness.ts
+++ b/switch/harness.ts
@@ -6,7 +6,7 @@
 
 import {Harness} from '../testing/harness.js';
 
-import {Switch} from './lib/switch.js';
+import {Switch} from './internal/switch.js';
 
 /**
  * Test harness for switch elements.
diff --git a/switch/lib/README.md b/switch/internal/README.md
similarity index 100%
rename from switch/lib/README.md
rename to switch/internal/README.md
diff --git a/switch/lib/_handle.scss b/switch/internal/_handle.scss
similarity index 100%
rename from switch/lib/_handle.scss
rename to switch/internal/_handle.scss
diff --git a/switch/lib/_icon.scss b/switch/internal/_icon.scss
similarity index 100%
rename from switch/lib/_icon.scss
rename to switch/internal/_icon.scss
diff --git a/switch/lib/_switch.scss b/switch/internal/_switch.scss
similarity index 100%
rename from switch/lib/_switch.scss
rename to switch/internal/_switch.scss
diff --git a/switch/lib/_track.scss b/switch/internal/_track.scss
similarity index 100%
rename from switch/lib/_track.scss
rename to switch/internal/_track.scss
diff --git a/switch/lib/forced-colors-styles.scss b/switch/internal/forced-colors-styles.scss
similarity index 100%
rename from switch/lib/forced-colors-styles.scss
rename to switch/internal/forced-colors-styles.scss
diff --git a/switch/lib/switch-styles.scss b/switch/internal/switch-styles.scss
similarity index 100%
rename from switch/lib/switch-styles.scss
rename to switch/internal/switch-styles.scss
diff --git a/switch/lib/switch.ts b/switch/internal/switch.ts
similarity index 100%
rename from switch/lib/switch.ts
rename to switch/internal/switch.ts
diff --git a/switch/lib/switch_test.ts b/switch/internal/switch_test.ts
similarity index 100%
rename from switch/lib/switch_test.ts
rename to switch/internal/switch_test.ts
diff --git a/switch/switch.ts b/switch/switch.ts
index 90e1782994..3e3bda8979 100644
--- a/switch/switch.ts
+++ b/switch/switch.ts
@@ -6,9 +6,9 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {styles as forcedColorsStyles} from './lib/forced-colors-styles.css.js';
-import {Switch} from './lib/switch.js';
-import {styles} from './lib/switch-styles.css.js';
+import {styles as forcedColorsStyles} from './internal/forced-colors-styles.css.js';
+import {Switch} from './internal/switch.js';
+import {styles} from './internal/switch-styles.css.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/tabs/_tab.scss b/tabs/_tab.scss
index 8709ac7412..952b5054ab 100644
--- a/tabs/_tab.scss
+++ b/tabs/_tab.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/tab' show theme;
+@forward './internal/tab' show theme;
diff --git a/tabs/harness.ts b/tabs/harness.ts
index b85f7d69c2..bf97d7c3ae 100644
--- a/tabs/harness.ts
+++ b/tabs/harness.ts
@@ -6,8 +6,8 @@
 
 import {ElementWithHarness, Harness} from '../testing/harness.js';
 
-import {Tab} from './lib/tab.js';
-import {Tabs} from './lib/tabs.js';
+import {Tab} from './internal/tab.js';
+import {Tabs} from './internal/tabs.js';
 
 /**
  * Test harness for Tab.
diff --git a/tabs/lib/_tab.scss b/tabs/internal/_tab.scss
similarity index 100%
rename from tabs/lib/_tab.scss
rename to tabs/internal/_tab.scss
diff --git a/tabs/lib/_tabs.scss b/tabs/internal/_tabs.scss
similarity index 100%
rename from tabs/lib/_tabs.scss
rename to tabs/internal/_tabs.scss
diff --git a/tabs/lib/tab-styles.scss b/tabs/internal/tab-styles.scss
similarity index 100%
rename from tabs/lib/tab-styles.scss
rename to tabs/internal/tab-styles.scss
diff --git a/tabs/lib/tab.ts b/tabs/internal/tab.ts
similarity index 100%
rename from tabs/lib/tab.ts
rename to tabs/internal/tab.ts
diff --git a/tabs/lib/tabs-styles.scss b/tabs/internal/tabs-styles.scss
similarity index 100%
rename from tabs/lib/tabs-styles.scss
rename to tabs/internal/tabs-styles.scss
diff --git a/tabs/lib/tabs.ts b/tabs/internal/tabs.ts
similarity index 100%
rename from tabs/lib/tabs.ts
rename to tabs/internal/tabs.ts
diff --git a/tabs/tab.ts b/tabs/tab.ts
index a8222b2f95..c53b632357 100644
--- a/tabs/tab.ts
+++ b/tabs/tab.ts
@@ -6,10 +6,10 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {Tab} from './lib/tab.js';
-import {styles} from './lib/tab-styles.css.js';
+import {Tab} from './internal/tab.js';
+import {styles} from './internal/tab-styles.css.js';
 
-export {TabVariant} from './lib/tab.js';
+export {TabVariant} from './internal/tab.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/tabs/tabs.ts b/tabs/tabs.ts
index eb81aaaac5..0db9a84f50 100644
--- a/tabs/tabs.ts
+++ b/tabs/tabs.ts
@@ -8,8 +8,8 @@ import './tab.js';
 
 import {customElement} from 'lit/decorators.js';
 
-import {Tabs} from './lib/tabs.js';
-import {styles} from './lib/tabs-styles.css.js';
+import {Tabs} from './internal/tabs.js';
+import {styles} from './internal/tabs-styles.css.js';
 
 export {MdTab, TabVariant} from './tab.js';
 
diff --git a/testing/table/_test-table.scss b/testing/table/_test-table.scss
index b73f478dc2..9e6289c337 100644
--- a/testing/table/_test-table.scss
+++ b/testing/table/_test-table.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/test-table' show theme;
+@forward './internal/test-table' show theme;
diff --git a/testing/table/lib/_test-table.scss b/testing/table/internal/_test-table.scss
similarity index 100%
rename from testing/table/lib/_test-table.scss
rename to testing/table/internal/_test-table.scss
diff --git a/testing/table/lib/test-table-styles.scss b/testing/table/internal/test-table-styles.scss
similarity index 100%
rename from testing/table/lib/test-table-styles.scss
rename to testing/table/internal/test-table-styles.scss
diff --git a/testing/table/lib/test-table.ts b/testing/table/internal/test-table.ts
similarity index 100%
rename from testing/table/lib/test-table.ts
rename to testing/table/internal/test-table.ts
diff --git a/testing/table/lib/test-table_test.ts b/testing/table/internal/test-table_test.ts
similarity index 100%
rename from testing/table/lib/test-table_test.ts
rename to testing/table/internal/test-table_test.ts
diff --git a/testing/table/test-table.ts b/testing/table/test-table.ts
index e2a0d95e89..74c4103fda 100644
--- a/testing/table/test-table.ts
+++ b/testing/table/test-table.ts
@@ -6,10 +6,10 @@
 
 import {customElement} from 'lit/decorators.js';
 
-import {TestTable} from './lib/test-table.js';
-import {styles as testTableStyles} from './lib/test-table-styles.css.js';
+import {TestTable} from './internal/test-table.js';
+import {styles as testTableStyles} from './internal/test-table-styles.css.js';
 
-export {TestTableTemplate} from './lib/test-table.js';
+export {TestTableTemplate} from './internal/test-table.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/textfield/_filled-text-field.scss b/textfield/_filled-text-field.scss
index 4719e26095..50a5259c0f 100644
--- a/textfield/_filled-text-field.scss
+++ b/textfield/_filled-text-field.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/filled-text-field' show theme;
+@forward './internal/filled-text-field' show theme;
diff --git a/textfield/_outlined-text-field.scss b/textfield/_outlined-text-field.scss
index 708489621d..141fdb5819 100644
--- a/textfield/_outlined-text-field.scss
+++ b/textfield/_outlined-text-field.scss
@@ -3,4 +3,4 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 
-@forward './lib/outlined-text-field' show theme;
+@forward './internal/outlined-text-field' show theme;
diff --git a/textfield/filled-text-field.ts b/textfield/filled-text-field.ts
index 42fdfe2ab8..4b1a3a84f8 100644
--- a/textfield/filled-text-field.ts
+++ b/textfield/filled-text-field.ts
@@ -9,12 +9,12 @@ import '../field/filled-field.js';
 import {customElement} from 'lit/decorators.js';
 import {literal} from 'lit/static-html.js';
 
-import {styles as filledForcedColorsStyles} from './lib/filled-forced-colors-styles.css.js';
-import {styles as filledStyles} from './lib/filled-styles.css.js';
-import {FilledTextField} from './lib/filled-text-field.js';
-import {styles as sharedStyles} from './lib/shared-styles.css.js';
+import {styles as filledForcedColorsStyles} from './internal/filled-forced-colors-styles.css.js';
+import {styles as filledStyles} from './internal/filled-styles.css.js';
+import {FilledTextField} from './internal/filled-text-field.js';
+import {styles as sharedStyles} from './internal/shared-styles.css.js';
 
-export {TextFieldType} from './lib/text-field.js';
+export {TextFieldType} from './internal/text-field.js';
 
 declare global {
   interface HTMLElementTagNameMap {
diff --git a/textfield/harness.ts b/textfield/harness.ts
index e1dfe99e90..080475eba5 100644
--- a/textfield/harness.ts
+++ b/textfield/harness.ts
@@ -6,7 +6,7 @@
 
 import {Harness} from '../testing/harness.js';
 
-import {TextField} from './lib/text-field.js';
+import {TextField} from './internal/text-field.js';
 
 /**
  * Test harness for text field elements.
diff --git a/textfield/lib/_filled-text-field.scss b/textfield/internal/_filled-text-field.scss
similarity index 100%
rename from textfield/lib/_filled-text-field.scss
rename to textfield/internal/_filled-text-field.scss
diff --git a/textfield/lib/_icon.scss b/textfield/internal/_icon.scss
similarity index 100%
rename from textfield/lib/_icon.scss
rename to textfield/internal/_icon.scss
diff --git a/textfield/lib/_input.scss b/textfield/internal/_input.scss
similarity index 100%
rename from textfield/lib/_input.scss
rename to textfield/internal/_input.scss
diff --git a/textfield/lib/_outlined-text-field.scss b/textfield/internal/_outlined-text-field.scss
similarity index 100%
rename from textfield/lib/_outlined-text-field.scss
rename to textfield/internal/_outlined-text-field.scss
diff --git a/textfield/lib/_shared.scss b/textfield/internal/_shared.scss
similarity index 100%
rename from textfield/lib/_shared.scss
rename to textfield/internal/_shared.scss
diff --git a/textfield/lib/filled-forced-colors-styles.scss b/textfield/internal/filled-forced-colors-styles.scss
similarity index 100%
rename from textfield/lib/filled-forced-colors-styles.scss
rename to textfield/internal/filled-forced-colors-styles.scss
diff --git a/textfield/lib/filled-styles.scss b/textfield/internal/filled-styles.scss
similarity index 100%
rename from textfield/lib/filled-styles.scss
rename to textfield/internal/filled-styles.scss
diff --git a/textfield/lib/filled-text-field.ts b/textfield/internal/filled-text-field.ts
similarity index 100%
rename from textfield/lib/filled-text-field.ts
rename to textfield/internal/filled-text-field.ts
diff --git a/textfield/lib/outlined-forced-colors-styles.scss b/textfield/internal/outlined-forced-colors-styles.scss
similarity index 100%
rename from textfield/lib/outlined-forced-colors-styles.scss
rename to textfield/internal/outlined-forced-colors-styles.scss
diff --git a/textfield/lib/outlined-styles.scss b/textfield/internal/outlined-styles.scss
similarity index 100%
rename from textfield/lib/outlined-styles.scss
rename to textfield/internal/outlined-styles.scss
diff --git a/textfield/lib/outlined-text-field.ts b/textfield/internal/outlined-text-field.ts
similarity index 100%
rename from textfield/lib/outlined-text-field.ts
rename to textfield/internal/outlined-text-field.ts
diff --git a/textfield/lib/shared-styles.scss b/textfield/internal/shared-styles.scss
similarity index 100%
rename from textfield/lib/shared-styles.scss
rename to textfield/internal/shared-styles.scss
diff --git a/textfield/lib/text-field.ts b/textfield/internal/text-field.ts
similarity index 100%
rename from textfield/lib/text-field.ts
rename to textfield/internal/text-field.ts
diff --git a/textfield/lib/text-field_test.ts b/textfield/internal/text-field_test.ts
similarity index 100%
rename from textfield/lib/text-field_test.ts
rename to textfield/internal/text-field_test.ts
diff --git a/textfield/outlined-text-field.ts b/textfield/outlined-text-field.ts
index fab6f5db0e..3f48c28706 100644
--- a/textfield/outlined-text-field.ts
+++ b/textfield/outlined-text-field.ts
@@ -9,12 +9,12 @@ import '../field/outlined-field.js';
 import {customElement} from 'lit/decorators.js';
 import {literal} from 'lit/static-html.js';
 
-import {styles as outlinedForcedColorsStyles} from './lib/outlined-forced-colors-styles.css.js';
-import {styles as outlinedStyles} from './lib/outlined-styles.css.js';
-import {OutlinedTextField} from './lib/outlined-text-field.js';
-import {styles as sharedStyles} from './lib/shared-styles.css.js';
+import {styles as outlinedForcedColorsStyles} from './internal/outlined-forced-colors-styles.css.js';
+import {styles as outlinedStyles} from './internal/outlined-styles.css.js';
+import {OutlinedTextField} from './internal/outlined-text-field.js';
+import {styles as sharedStyles} from './internal/shared-styles.css.js';
 
-export {TextFieldType} from './lib/text-field.js';
+export {TextFieldType} from './internal/text-field.js';
 
 declare global {
   interface HTMLElementTagNameMap {