diff --git a/.gitignore b/.gitignore
index a74a2124f..7e8d30fea 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,6 +19,7 @@ yarn-error.log
 /lib/
 /build/
 /bundlesize/dist/
+**/custom-elements.json
 
 ## types
 *.d.ts
diff --git a/package.json b/package.json
index dafa0ebc7..78d689dd7 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
     "build:docs": "wca analyze \"packages/tabs/**/*.js\"",
     "build:types": "tsc -p tsconfig.build.types.json",
     "bundlesize": "rollup -c bundlesize/rollup.config.js && bundlesize",
+    "custom-elements-manifest": "node scripts/workspaces-scripts.mjs run custom-elements-manifest",
     "debug": "web-test-runner --watch --config web-test-runner-chrome.config.mjs",
     "debug:firefox": "web-test-runner --watch --config web-test-runner-firefox.config.mjs",
     "debug:webkit": "web-test-runner --watch --config web-test-runner-webkit.config.mjs",
@@ -23,6 +24,7 @@
     "lint:prettier": "prettier \"**/*.js\" --list-different || (echo '↑↑ these files are not prettier formatted ↑↑' && exit 1)",
     "lint:types": "tsc",
     "lint:versions": "node ./scripts/lint-versions.js",
+    "postinstall": "npm run custom-elements-manifest",
     "release": "npm run build:types && npm run build:docs && changeset publish",
     "start": "npm run storybook",
     "storybook": "start-storybook -p 9001",
@@ -41,6 +43,7 @@
     "@changesets/cli": "^2.9.2",
     "@commitlint/cli": "^7.0.0",
     "@commitlint/config-conventional": "^7.0.0",
+    "@custom-elements-manifest/analyzer": "^0.1.7",
     "@mdjs/core": "^0.3.1",
     "@open-wc/building-rollup": "^1.2.1",
     "@open-wc/demoing-storybook": "^2.0.2",
diff --git a/packages/accordion/package.json b/packages/accordion/package.json
index cc68af4c7..1b90cca19 100644
--- a/packages/accordion/package.json
+++ b/packages/accordion/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group accordion",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group accordion",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group accordion",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group accordion"
   },
   "sideEffects": [
@@ -46,5 +48,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-accordion": "./lion-accordion.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/ajax/package.json b/packages/ajax/package.json
index 96f5079b5..95c5f686b 100644
--- a/packages/ajax/package.json
+++ b/packages/ajax/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group ajax",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group ajax",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group ajax",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group ajax"
   },
   "keywords": [
@@ -39,5 +41,6 @@
   "publishConfig": {
     "access": "public"
   },
-  "exports": "./index.js"
+  "exports": "./index.js",
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/button/package.json b/packages/button/package.json
index 372e4831d..1d535696b 100644
--- a/packages/button/package.json
+++ b/packages/button/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group button",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group button",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group button",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group button"
   },
   "sideEffects": [
@@ -46,5 +48,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-button": "./lion-button.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/calendar/package.json b/packages/calendar/package.json
index f88834fac..bbffe2579 100644
--- a/packages/calendar/package.json
+++ b/packages/calendar/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group calendar",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group calendar",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group calendar",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group calendar"
   },
   "sideEffects": [
@@ -48,5 +50,6 @@
     ".": "./index.js",
     "./lion-calendar": "./lion-calendar.js",
     "./test-helpers": "./test-helpers.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/checkbox-group/package.json b/packages/checkbox-group/package.json
index a0b4c5094..ff4b4def9 100644
--- a/packages/checkbox-group/package.json
+++ b/packages/checkbox-group/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group checkbox-group",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group checkbox-group",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group checkbox-group",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group checkbox-group"
   },
   "sideEffects": [
@@ -52,5 +54,6 @@
     "./lion-checkbox": "./lion-checkbox.js",
     "./lion-checkbox-group": "./lion-checkbox-group.js",
     "./lion-checkbox-indeterminate": "./lion-checkbox-indeterminate.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/collapsible/package.json b/packages/collapsible/package.json
index 1f8c11f04..707c5c227 100644
--- a/packages/collapsible/package.json
+++ b/packages/collapsible/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group collapsible",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group collapsible",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group collapsible",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group collapsible"
   },
   "sideEffects": [
@@ -49,5 +51,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-collapsible": "./lion-collapsible.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/combobox/package.json b/packages/combobox/package.json
index 44a7d668e..8b443603f 100644
--- a/packages/combobox/package.json
+++ b/packages/combobox/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group combobox",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group combobox",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group combobox",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group combobox"
   },
   "sideEffects": [
@@ -59,5 +61,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-combobox": "./lion-combobox.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/core/package.json b/packages/core/package.json
index 5b11627b2..4ac1138ec 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group core",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group core",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group core",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group core"
   },
   "sideEffects": [
@@ -51,5 +53,6 @@
     "./test-helpers/*": "./test-helpers/*",
     "./closestPolyfill": "./src/closestPolyfill.js",
     "./differentKeyEventNamesShimIE": "./src/differentKeyEventNamesShimIE.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/dialog/package.json b/packages/dialog/package.json
index be120c619..170bb0929 100644
--- a/packages/dialog/package.json
+++ b/packages/dialog/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group dialog",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group dialog",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group dialog",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group dialog"
   },
   "sideEffects": [
@@ -48,5 +50,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-dialog": "./lion-dialog.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/fieldset/package.json b/packages/fieldset/package.json
index 16ac71309..9e0c2fb3c 100644
--- a/packages/fieldset/package.json
+++ b/packages/fieldset/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group fieldset",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group fieldset",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group fieldset",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group fieldset"
   },
   "sideEffects": [
@@ -48,5 +50,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-fieldset": "./lion-fieldset.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/form-core/package.json b/packages/form-core/package.json
index 0c70e457b..f99f4c0b5 100644
--- a/packages/form-core/package.json
+++ b/packages/form-core/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group form-core",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group form-core",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group form-core",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group form-core"
   },
   "sideEffects": [
@@ -51,5 +53,6 @@
     "./test-suites/*": "./test-suites/*",
     "./lion-field": "./lion-field.js",
     "./lion-validation-feedback": "./lion-validation-feedback.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/form-integrations/package.json b/packages/form-integrations/package.json
index 923ad646b..da36889da 100644
--- a/packages/form-integrations/package.json
+++ b/packages/form-integrations/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group form-integrations",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group form-integrations",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group form-integrations",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group form-integrations"
   },
   "sideEffects": [
@@ -65,5 +67,6 @@
   "publishConfig": {
     "access": "public"
   },
-  "exports": "./index.js"
+  "exports": "./index.js",
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/form/package.json b/packages/form/package.json
index af1680fd9..241362998 100644
--- a/packages/form/package.json
+++ b/packages/form/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group form",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group form",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group form",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group form"
   },
   "sideEffects": [
@@ -46,5 +48,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-form": "./lion-form.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/helpers/package.json b/packages/helpers/package.json
index 8c19d2727..b412e9fb7 100644
--- a/packages/helpers/package.json
+++ b/packages/helpers/package.json
@@ -21,6 +21,7 @@
     "sortEachDepth"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group helpers",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group helpers",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group helpers",
@@ -47,5 +48,6 @@
     ".": "./index.js",
     "./sb-action-logger": "./sb-action-logger.js",
     "./sb-locale-switcher": "./sb-locale-switcher.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/helpers/sb-action-logger/custom-elements.json b/packages/helpers/sb-action-logger/custom-elements.json
deleted file mode 100644
index fb97ea31b..000000000
--- a/packages/helpers/sb-action-logger/custom-elements.json
+++ /dev/null
@@ -1,52 +0,0 @@
-{
-  "version": 0,
-  "tags": [
-    {
-      "name": "sb-action-logger",
-      "description": "A visual element to show action logs in Storybook demos",
-      "properties": [
-        {
-          "name": "title",
-          "type": "String",
-          "description": "The title of action logger",
-          "default": "Action Logger"
-        },
-        {
-          "name": "simple",
-          "type": "Boolean",
-          "description": "Simple mode, which only shows a single log",
-          "default": "false"
-        }
-      ],
-      "events": [],
-      "slots": [],
-      "cssProperties": [
-        {
-          "name": "--sb-action-logger-title-color",
-          "description": "Color of the title",
-          "type": "Color"
-        },
-        {
-          "name": "--sb-action-logger-text-color",
-          "description": "Color of the logs' text",
-          "type": "Color"
-        },
-        {
-          "name": "--sb-action-logger-cue-color-primary",
-          "description": "Primary color of the visual cue",
-          "type": "Color"
-        },
-        {
-          "name": "--sb-action-logger-cue-color-secondary",
-          "description": "Secondary color of the visual cue",
-          "type": "Color"
-        },
-        {
-          "name": "--sb-action-logger-cue-duration",
-          "description": "Duration of the visual cue",
-          "type": "Number"
-        }
-      ]
-    }
-  ]
-}
diff --git a/packages/icon/package.json b/packages/icon/package.json
index 7809d5b7a..66ebbbeac 100644
--- a/packages/icon/package.json
+++ b/packages/icon/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group icon",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group icon",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group icon",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group icon"
   },
   "sideEffects": [
@@ -48,5 +50,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-icon": "./lion-icon.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/input-amount/package.json b/packages/input-amount/package.json
index a87c36609..25187398a 100644
--- a/packages/input-amount/package.json
+++ b/packages/input-amount/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group input-amount",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group input-amount",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group input-amount",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group input-amount"
   },
   "sideEffects": [
@@ -50,5 +52,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-input-amount": "./lion-input-amount.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/input-date/package.json b/packages/input-date/package.json
index 2295c96a2..c6d5e5800 100644
--- a/packages/input-date/package.json
+++ b/packages/input-date/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group input-date",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group input-date",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group input-date",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group input-date"
   },
   "sideEffects": [
@@ -50,5 +52,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-input-date": "./lion-input-date.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/input-datepicker/package.json b/packages/input-datepicker/package.json
index dd21db9a8..bd6a8daca 100644
--- a/packages/input-datepicker/package.json
+++ b/packages/input-datepicker/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group input-datepicker",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group input-datepicker",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group input-datepicker",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group input-datepicker"
   },
   "sideEffects": [
@@ -56,5 +58,6 @@
     ".": "./index.js",
     "./test-helpers/*": "./test-helpers/*",
     "./lion-input-datepicker": "./lion-input-datepicker.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/input-email/package.json b/packages/input-email/package.json
index 15a93b80f..d37460db4 100644
--- a/packages/input-email/package.json
+++ b/packages/input-email/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group input-email",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group input-email",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group input-email",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group input-email"
   },
   "sideEffects": [
@@ -50,5 +52,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-input-email": "./lion-input-email.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/input-iban/package.json b/packages/input-iban/package.json
index 4cd040b84..50c3a391d 100644
--- a/packages/input-iban/package.json
+++ b/packages/input-iban/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group input-iban",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group input-iban",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group input-iban",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group input-iban"
   },
   "sideEffects": [
@@ -51,5 +53,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-input-iban": "./lion-input-iban.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/input-range/package.json b/packages/input-range/package.json
index 713bd9291..5b5da50f4 100644
--- a/packages/input-range/package.json
+++ b/packages/input-range/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group input-range",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group input-range",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group input-range",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group input-range"
   },
   "sideEffects": [
@@ -49,5 +51,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-input-range": "./lion-input-range.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/input-stepper/package.json b/packages/input-stepper/package.json
index 28018717b..2c7c5bc2d 100644
--- a/packages/input-stepper/package.json
+++ b/packages/input-stepper/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group input-stepper",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group input-stepper",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group input-stepper",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group input-stepper"
   },
   "sideEffects": [
@@ -49,5 +51,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-input-stepper": "./lion-input-stepper.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/input/package.json b/packages/input/package.json
index 4bc681f4e..3e765c83c 100644
--- a/packages/input/package.json
+++ b/packages/input/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group input",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group input",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group input",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group input"
   },
   "sideEffects": [
@@ -46,5 +48,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-input": "./lion-input.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/listbox/package.json b/packages/listbox/package.json
index 7756047ce..aac194104 100644
--- a/packages/listbox/package.json
+++ b/packages/listbox/package.json
@@ -15,18 +15,20 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
-    "test-suites",
+    "test-helpers",
     "translations",
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group listbox",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group listbox",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group listbox",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group listbox"
   },
   "sideEffects": [
@@ -53,5 +55,6 @@
     "./lion-listbox": "./lion-listbox.js",
     "./lion-option": "./lion-option.js",
     "./lion-options": "./lion-options.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/localize/package.json b/packages/localize/package.json
index 25931b1f8..c0508f236 100644
--- a/packages/localize/package.json
+++ b/packages/localize/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group localize",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group localize",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group localize",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group localize"
   },
   "sideEffects": false,
@@ -46,5 +48,6 @@
   "exports": {
     ".": "./index.js",
     "./test-helpers": "./test-helpers.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/overlays/package.json b/packages/overlays/package.json
index aadb9b433..00a0bba96 100644
--- a/packages/overlays/package.json
+++ b/packages/overlays/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group overlays",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group overlays",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group overlays",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group overlays"
   },
   "sideEffects": [
@@ -51,5 +53,6 @@
     ".": "./index.js",
     "./translations/*": "./translations/*",
     "./test-suites/*": "./test-suites/*"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/pagination/package.json b/packages/pagination/package.json
index 9147f27bf..433323785 100644
--- a/packages/pagination/package.json
+++ b/packages/pagination/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group pagination",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group pagination",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group pagination",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group pagination"
   },
   "sideEffects": [
@@ -47,5 +49,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-pagination": "./lion-pagination.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/progress-indicator/package.json b/packages/progress-indicator/package.json
index c46061581..4d3694147 100644
--- a/packages/progress-indicator/package.json
+++ b/packages/progress-indicator/package.json
@@ -15,16 +15,20 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
+    "docs",
     "src",
     "test",
+    "test-helpers",
     "translations",
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group progress-indicator",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group progress-indicator",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group progress-indicator",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group progress-indicator"
   },
   "sideEffects": [
@@ -47,5 +51,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-progress-indicator": "./lion-progress-indicator.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/radio-group/package.json b/packages/radio-group/package.json
index a0839ebfb..484a2e75a 100644
--- a/packages/radio-group/package.json
+++ b/packages/radio-group/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group radio-group",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group radio-group",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group radio-group",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group radio-group"
   },
   "sideEffects": [
@@ -50,5 +52,6 @@
     ".": "./index.js",
     "./lion-radio": "./lion-radio.js",
     "./lion-radio-group": "./lion-radio-group.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/select-rich/package.json b/packages/select-rich/package.json
index b8e9f4e88..addc16386 100644
--- a/packages/select-rich/package.json
+++ b/packages/select-rich/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group select-rich",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group select-rich",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group select-rich",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group select-rich"
   },
   "sideEffects": [
@@ -58,5 +60,6 @@
     "./lion-options": "./lion-options.js",
     "./lion-select-invoker": "./lion-select-invoker.js",
     "./lion-select-rich": "./lion-select-rich.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/select/package.json b/packages/select/package.json
index d8a3e9350..9e044bb82 100644
--- a/packages/select/package.json
+++ b/packages/select/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group select",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group select",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group select",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group select"
   },
   "sideEffects": [
@@ -47,5 +49,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-select": "./lion-select.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/singleton-manager/package.json b/packages/singleton-manager/package.json
index 666f1242f..b338daf5c 100644
--- a/packages/singleton-manager/package.json
+++ b/packages/singleton-manager/package.json
@@ -23,6 +23,7 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group singleton-manager",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group singleton-manager",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group singleton-manager",
@@ -40,5 +41,6 @@
   "publishConfig": {
     "access": "public"
   },
-  "exports": "./index.js"
+  "exports": "./index.js",
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/steps/package.json b/packages/steps/package.json
index 2078e426a..948613644 100644
--- a/packages/steps/package.json
+++ b/packages/steps/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group steps",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group steps",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group steps",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group steps"
   },
   "sideEffects": [
@@ -48,5 +50,6 @@
     ".": "./index.js",
     "./lion-step": "./lion-step.js",
     "./lion-steps": "./lion-steps.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/switch/package.json b/packages/switch/package.json
index 779a46ef5..7b6a933fd 100644
--- a/packages/switch/package.json
+++ b/packages/switch/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group switch",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group switch",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group switch",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group switch"
   },
   "sideEffects": [
@@ -50,5 +52,6 @@
     ".": "./index.js",
     "./lion-switch": "./lion-switch.js",
     "./lion-switch-button": "./lion-switch-button.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/tabs/package.json b/packages/tabs/package.json
index 7dcd4f051..161bfa8f1 100644
--- a/packages/tabs/package.json
+++ b/packages/tabs/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group tabs",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group tabs",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group tabs",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group tabs"
   },
   "sideEffects": [
@@ -43,6 +45,7 @@
   "publishConfig": {
     "access": "public"
   },
+  "customElementsManifest": "custom-elements.json",
   "exports": {
     ".": "./index.js",
     "./lion-tabs": "./lion-tabs.js"
diff --git a/packages/textarea/package.json b/packages/textarea/package.json
index 7a580ddfd..3c1e9a690 100644
--- a/packages/textarea/package.json
+++ b/packages/textarea/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group textarea",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group textarea",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group textarea",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group textarea"
   },
   "sideEffects": [
@@ -49,5 +51,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-textarea": "./lion-textarea.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/tooltip/package.json b/packages/tooltip/package.json
index ab0a44d37..c2d9115e0 100644
--- a/packages/tooltip/package.json
+++ b/packages/tooltip/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group tooltip",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group tooltip",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group tooltip",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group tooltip"
   },
   "sideEffects": [
@@ -48,5 +50,6 @@
   "exports": {
     ".": "./index.js",
     "./lion-tooltip": "./lion-tooltip.js"
-  }
+  },
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/packages/validate-messages/package.json b/packages/validate-messages/package.json
index aa1ec27ac..7c9d3f498 100644
--- a/packages/validate-messages/package.json
+++ b/packages/validate-messages/package.json
@@ -15,6 +15,7 @@
   "files": [
     "*.d.ts",
     "*.js",
+    "custom-elements.json",
     "docs",
     "src",
     "test",
@@ -23,10 +24,11 @@
     "types"
   ],
   "scripts": {
+    "custom-elements-manifest": "custom-elements-manifest analyze --exclude 'docs/**/*'",
     "debug": "cd ../../ && npm run debug -- --group validate-messages",
     "debug:firefox": "cd ../../ && npm run debug:firefox -- --group validate-messages",
     "debug:webkit": "cd ../../ && npm run debug:webkit -- --group validate-messages",
-    "prepublishOnly": "../../scripts/npm-prepublish.js",
+    "prepublishOnly": "../../scripts/npm-prepublish.js && npm run custom-elements-manifest",
     "test": "cd ../../ && npm run test:browser -- --group validate-messages"
   },
   "dependencies": {
@@ -44,5 +46,6 @@
   "publishConfig": {
     "access": "public"
   },
-  "exports": "./index.js"
+  "exports": "./index.js",
+  "customElementsManifest": "custom-elements.json"
 }
diff --git a/yarn.lock b/yarn.lock
index 80788ca18..374ceb61c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1350,6 +1350,22 @@
   resolved "https://registry.yarnpkg.com/@coolaj86/urequest/-/urequest-1.3.7.tgz#66a1d66378dd6534e9c8e68948bf09acf32bab77"
   integrity sha512-PPrVYra9aWvZjSCKl/x1pJ9ZpXda1652oJrPBYy5rQumJJMkmTBN3ux+sK2xAUwVvv2wnewDlaQaHLxLwSHnIA==
 
+"@custom-elements-manifest/analyzer@^0.1.7":
+  version "0.1.7"
+  resolved "https://registry.yarnpkg.com/@custom-elements-manifest/analyzer/-/analyzer-0.1.7.tgz#b41577dfdc20cdc046060ab86f659f91092d1a27"
+  integrity sha512-SuEiCAI7J9udOhUZIpAWNk535d/GMjyggTM+rucv66Uz1DE0nmj6YnJ22apwMqESfvjGlH7qjNo6f0GukJFaTA==
+  dependencies:
+    "@custom-elements-manifest/helpers" "^0.0.3"
+    command-line-args "^5.1.1"
+    comment-parser "^0.7.6"
+    globby "^11.0.1"
+    typescript "~4.0.0"
+
+"@custom-elements-manifest/helpers@^0.0.3":
+  version "0.0.3"
+  resolved "https://registry.yarnpkg.com/@custom-elements-manifest/helpers/-/helpers-0.0.3.tgz#671ef61a3612f0417574d0de278431bbe610d413"
+  integrity sha512-39SVVFyf3v+TGftspP0RmhdE4ZgmmLm4Fi9r2Y72fnY4ZMv/TOO/FoWoOJo/ruwzSGWOnnXS+TQ/2JNJ9tHA3g==
+
 "@emotion/cache@^10.0.27":
   version "10.0.29"
   resolved "https://registry.yarnpkg.com/@emotion/cache/-/cache-10.0.29.tgz#87e7e64f412c060102d589fe7c6dc042e6f9d1e0"
@@ -4252,6 +4268,11 @@ commander@~2.9.0:
   dependencies:
     graceful-readlink ">= 1.0.0"
 
+comment-parser@^0.7.6:
+  version "0.7.6"
+  resolved "https://registry.yarnpkg.com/comment-parser/-/comment-parser-0.7.6.tgz#0e743a53c8e646c899a1323db31f6cd337b10f12"
+  integrity sha512-GKNxVA7/iuTnAqGADlTWX4tkhzxZKXp5fLJqKTlQLHkE65XDUKutZ3BHaJC5IGcper2tT3QRD1xr4o3jNpgXXg==
+
 common-tags@^1.8.0:
   version "1.8.0"
   resolved "https://registry.yarnpkg.com/common-tags/-/common-tags-1.8.0.tgz#8e3153e542d4a39e9b10554434afaaf98956a937"
@@ -11696,6 +11717,11 @@ typescript@3.9.7, typescript@^3.8.3:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.9.7.tgz#98d600a5ebdc38f40cb277522f12dc800e9e25fa"
   integrity sha512-BLbiRkiBzAwsjut4x/dsibSTB6yWpwT5qWmC2OfuCg3GgVQCSgMs4vEctYPhsaGtd0AeuuHMkjZ2h2WG8MSzRw==
 
+typescript@~4.0.0:
+  version "4.0.7"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.0.7.tgz#7168032c43d2a2671c95c07812f69523c79590af"
+  integrity sha512-yi7M4y74SWvYbnazbn8/bmJmX4Zlej39ZOqwG/8dut/MYoSQ119GY9ZFbbGsD4PFZYWxqik/XsP3vk3+W5H3og==
+
 typical@^4.0.0:
   version "4.0.0"
   resolved "https://registry.yarnpkg.com/typical/-/typical-4.0.0.tgz#cbeaff3b9d7ae1e2bbfaf5a4e6f11eccfde94fc4"