diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 00000000000..df3ddcba602
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+*.json  linguist-language=JSON-with-Comments
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index b4fc4c14c08..93f49bb5bb0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -81,3 +81,13 @@ typings/
 
 # NPM Lockfiles
 package-lock.json
+
+# temp folder used by api-extractor
+temp
+packages-exp/**/temp
+
+# temp markdowns generated for individual SDKs
+packages-exp/**/docs
+
+# files generated by api-extractor that should not be tracked
+tsdoc-metadata.json
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
index fae3be0b273..1a4875b99aa 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -9,5 +9,6 @@
     // Exclude installed dependencies from searches too
     "**/node_modules": true
   },
-  "typescript.tsdk": "node_modules/typescript/lib"
+  "typescript.tsdk": "node_modules/typescript/lib",
+  "files.associations": { "*.json": "jsonc" }
 }
diff --git a/common/api-review/app-exp.api.md b/common/api-review/app-exp.api.md
new file mode 100644
index 00000000000..3989076e0aa
--- /dev/null
+++ b/common/api-review/app-exp.api.md
@@ -0,0 +1,44 @@
+## API Report File for "@firebase/app-exp"
+
+> Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
+
+```ts
+
+import { FirebaseApp } from '@firebase/app-types-exp';
+import { FirebaseAppConfig } from '@firebase/app-types-exp';
+import { FirebaseOptions } from '@firebase/app-types-exp';
+import { LogCallback } from '@firebase/logger';
+import { LogLevel } from '@firebase/logger';
+import { LogOptions } from '@firebase/logger';
+
+// @public
+export function deleteApp(app: FirebaseApp): Promise<void>;
+
+// @public
+export function getApp(name?: string): FirebaseApp;
+
+// @public
+export function getApps(): FirebaseApp[];
+
+// @public
+export function initializeApp(options: FirebaseOptions, name?: string): FirebaseApp;
+
+// @public
+export function initializeApp(options: FirebaseOptions, config?: FirebaseAppConfig): FirebaseApp;
+
+export { LogLevel }
+
+// @public
+export function onLog(logCallback: LogCallback | null, options?: LogOptions): void;
+
+// @public
+export function registerVersion(libraryKeyOrName: string, version: string, variant?: string): void;
+
+// @public
+export const SDK_VERSION: string;
+
+// @public
+export function setLogLevel(logLevel: LogLevel): void;
+
+
+```
diff --git a/common/api-review/app-types-exp.api.md b/common/api-review/app-types-exp.api.md
new file mode 100644
index 00000000000..5da58a3a2f3
--- /dev/null
+++ b/common/api-review/app-types-exp.api.md
@@ -0,0 +1,65 @@
+## API Report File for "@firebase/app-types-exp"
+
+> Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
+
+```ts
+
+import { ComponentContainer } from '@firebase/component';
+
+// @public
+export interface FirebaseApp {
+  automaticDataCollectionEnabled: boolean;
+
+  readonly name: string;
+
+  readonly options: FirebaseOptions;
+}
+
+// @public (undocumented)
+export interface FirebaseAppConfig {
+  // (undocumented)
+  automaticDataCollectionEnabled?: boolean;
+  // (undocumented)
+  name?: string;
+}
+
+// @internal (undocumented)
+export interface _FirebaseAppInternal extends FirebaseApp {
+  // (undocumented)
+  checkDestroyed(): void;
+  // (undocumented)
+  container: ComponentContainer;
+  // (undocumented)
+  isDeleted: boolean;
+}
+
+// @public (undocumented)
+export interface FirebaseOptions {
+  // (undocumented)
+  apiKey?: string;
+  // (undocumented)
+  appId?: string;
+  // (undocumented)
+  authDomain?: string;
+  // (undocumented)
+  databaseURL?: string;
+  // (undocumented)
+  measurementId?: string;
+  // (undocumented)
+  messagingSenderId?: string;
+  // (undocumented)
+  projectId?: string;
+  // (undocumented)
+  storageBucket?: string;
+}
+
+// @public (undocumented)
+export interface PlatformLoggerService {
+  // (undocumented)
+  getPlatformInfoString(): string;
+}
+
+
+// (No @packageDocumentation comment for this package)
+
+```
diff --git a/config/api-extractor.json b/config/api-extractor.json
new file mode 100644
index 00000000000..078b4b0b510
--- /dev/null
+++ b/config/api-extractor.json
@@ -0,0 +1,370 @@
+/**
+ * Config file for API Extractor.  For more info, please visit: https://api-extractor.com
+ */
+{
+  "$schema": "https://developer.microsoft.com/json-schemas/api-extractor/v7/api-extractor.schema.json",
+
+  /**
+   * Optionally specifies another JSON config file that this file extends from.  This provides a way for
+   * standard settings to be shared across multiple projects.
+   *
+   * If the path starts with "./" or "../", the path is resolved relative to the folder of the file that contains
+   * the "extends" field.  Otherwise, the first path segment is interpreted as an NPM package name, and will be
+   * resolved using NodeJS require().
+   *
+   * SUPPORTED TOKENS: none
+   * DEFAULT VALUE: ""
+   */
+  // "extends": "./shared/api-extractor-base.json"
+  // "extends": "my-package/include/api-extractor-base.json"
+
+  /**
+   * Determines the "<projectFolder>" token that can be used with other config file settings.  The project folder
+   * typically contains the tsconfig.json and package.json config files, but the path is user-defined.
+   *
+   * The path is resolved relative to the folder of the config file that contains the setting.
+   *
+   * The default value for "projectFolder" is the token "<lookup>", which means the folder is determined by traversing
+   * parent folders, starting from the folder containing api-extractor.json, and stopping at the first folder
+   * that contains a tsconfig.json file.  If a tsconfig.json file cannot be found in this way, then an error
+   * will be reported.
+   *
+   * SUPPORTED TOKENS: <lookup>
+   * DEFAULT VALUE: "<lookup>"
+   */
+  // "projectFolder": "..",
+
+  /**
+   * (REQUIRED) Specifies the .d.ts file to be used as the starting point for analysis.  API Extractor
+   * analyzes the symbols exported by this module.
+   *
+   * The file extension must be ".d.ts" and not ".ts".
+   *
+   * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+   * prepend a folder token such as "<projectFolder>".
+   *
+   * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+   */
+   // Project should set this value to its entry point d.ts file. 
+   // "mainEntryPointFilePath": "<projectFolder>/lib/index.d.ts",
+
+  /**
+   * A list of NPM package names whose exports should be treated as part of this package.
+   *
+   * For example, suppose that Webpack is used to generate a distributed bundle for the project "library1",
+   * and another NPM package "library2" is embedded in this bundle.  Some types from library2 may become part
+   * of the exported API for library1, but by default API Extractor would generate a .d.ts rollup that explicitly
+   * imports library2.  To avoid this, we can specify:
+   *
+   *   "bundledPackages": [ "library2" ],
+   *
+   * This would direct API Extractor to embed those types directly in the .d.ts rollup, as if they had been
+   * local files for library1.
+   */
+  "bundledPackages": [ ],
+
+  /**
+   * Determines how the TypeScript compiler engine will be invoked by API Extractor.
+   */
+  "compiler": {
+    /**
+     * Specifies the path to the tsconfig.json file to be used by API Extractor when analyzing the project.
+     *
+     * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+     * prepend a folder token such as "<projectFolder>".
+     *
+     * Note: This setting will be ignored if "overrideTsconfig" is used.
+     *
+     * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+     * DEFAULT VALUE: "<projectFolder>/tsconfig.json"
+     */
+    // "tsconfigFilePath": "<projectFolder>/tsconfig.json",
+
+    /**
+     * Provides a compiler configuration that will be used instead of reading the tsconfig.json file from disk.
+     * The object must conform to the TypeScript tsconfig schema:
+     *
+     * http://json.schemastore.org/tsconfig
+     *
+     * If omitted, then the tsconfig.json file will be read from the "projectFolder".
+     *
+     * DEFAULT VALUE: no overrideTsconfig section
+     */
+    // "overrideTsconfig": {
+    //   . . .
+    // }
+
+    /**
+     * This option causes the compiler to be invoked with the --skipLibCheck option. This option is not recommended
+     * and may cause API Extractor to produce incomplete or incorrect declarations, but it may be required when
+     * dependencies contain declarations that are incompatible with the TypeScript engine that API Extractor uses
+     * for its analysis.  Where possible, the underlying issue should be fixed rather than relying on skipLibCheck.
+     *
+     * DEFAULT VALUE: false
+     */
+    // "skipLibCheck": true,
+  },
+
+  /**
+   * Configures how the API report file (*.api.md) will be generated.
+   */
+  "apiReport": {
+    /**
+     * (REQUIRED) Whether to generate an API report.
+     */
+    "enabled": true,
+
+    /**
+     * The filename for the API report files.  It will be combined with "reportFolder" or "reportTempFolder" to produce
+     * a full file path.
+     *
+     * The file extension should be ".api.md", and the string should not contain a path separator such as "\" or "/".
+     *
+     * SUPPORTED TOKENS: <packageName>, <unscopedPackageName>
+     * DEFAULT VALUE: "<unscopedPackageName>.api.md"
+     */
+    // "reportFileName": "<unscopedPackageName>.api.md",
+
+    /**
+     * Specifies the folder where the API report file is written.  The file name portion is determined by
+     * the "reportFileName" setting.
+     *
+     * The API report file is normally tracked by Git.  Changes to it can be used to trigger a branch policy,
+     * e.g. for an API review.
+     *
+     * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+     * prepend a folder token such as "<projectFolder>".
+     *
+     * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+     * DEFAULT VALUE: "<projectFolder>/etc/"
+     */
+     "reportFolder": "<projectFolder>/../../common/api-review/",
+
+    /**
+     * Specifies the folder where the temporary report file is written.  The file name portion is determined by
+     * the "reportFileName" setting.
+     *
+     * After the temporary file is written to disk, it is compared with the file in the "reportFolder".
+     * If they are different, a production build will fail.
+     *
+     * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+     * prepend a folder token such as "<projectFolder>".
+     *
+     * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+     * DEFAULT VALUE: "<projectFolder>/temp/"
+     */
+    // "reportTempFolder": "<projectFolder>/temp/"
+  },
+
+  /**
+   * Configures how the doc model file (*.api.json) will be generated.
+   */
+  "docModel": {
+    /**
+     * (REQUIRED) Whether to generate a doc model file.
+     */
+    "enabled": true,
+
+    /**
+     * The output path for the doc model file.  The file extension should be ".api.json".
+     *
+     * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+     * prepend a folder token such as "<projectFolder>".
+     *
+     * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+     * DEFAULT VALUE: "<projectFolder>/temp/<unscopedPackageName>.api.json"
+     */
+    // "apiJsonFilePath": "<projectFolder>/temp/<unscopedPackageName>.api.json"
+  },
+
+  /**
+   * Configures how the .d.ts rollup file will be generated.
+   */
+  "dtsRollup": {
+    /**
+     * (REQUIRED) Whether to generate the .d.ts rollup file.
+     */
+    "enabled": true,
+
+    /**
+     * Specifies the output path for a .d.ts rollup file to be generated without any trimming.
+     * This file will include all declarations that are exported by the main entry point.
+     *
+     * If the path is an empty string, then this file will not be written.
+     *
+     * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+     * prepend a folder token such as "<projectFolder>".
+     *
+     * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+     * DEFAULT VALUE: "<projectFolder>/dist/<unscopedPackageName>.d.ts"
+     */
+    // "untrimmedFilePath": "<projectFolder>/dist/<unscopedPackageName>.d.ts",
+
+    /**
+     * Specifies the output path for a .d.ts rollup file to be generated with trimming for a "beta" release.
+     * This file will include only declarations that are marked as "@public" or "@beta".
+     *
+     * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+     * prepend a folder token such as "<projectFolder>".
+     *
+     * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+     * DEFAULT VALUE: ""
+     */
+    // "betaTrimmedFilePath": "<projectFolder>/dist/<unscopedPackageName>-beta.d.ts",
+
+
+    /**
+     * Specifies the output path for a .d.ts rollup file to be generated with trimming for a "public" release.
+     * This file will include only declarations that are marked as "@public".
+     *
+     * If the path is an empty string, then this file will not be written.
+     *
+     * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+     * prepend a folder token such as "<projectFolder>".
+     *
+     * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+     * DEFAULT VALUE: ""
+     */
+    // "publicTrimmedFilePath": "<projectFolder>/dist/<unscopedPackageName>-public.d.ts",
+
+    /**
+     * When a declaration is trimmed, by default it will be replaced by a code comment such as
+     * "Excluded from this release type: exampleMember".  Set "omitTrimmingComments" to true to remove the
+     * declaration completely.
+     *
+     * DEFAULT VALUE: false
+     */
+    // "omitTrimmingComments": true
+  },
+
+  /**
+   * Configures how the tsdoc-metadata.json file will be generated.
+   */
+  "tsdocMetadata": {
+    /**
+     * Whether to generate the tsdoc-metadata.json file.
+     *
+     * DEFAULT VALUE: true
+     */
+    // "enabled": true,
+
+    /**
+     * Specifies where the TSDoc metadata file should be written.
+     *
+     * The path is resolved relative to the folder of the config file that contains the setting; to change this,
+     * prepend a folder token such as "<projectFolder>".
+     *
+     * The default value is "<lookup>", which causes the path to be automatically inferred from the "tsdocMetadata",
+     * "typings" or "main" fields of the project's package.json.  If none of these fields are set, the lookup
+     * falls back to "tsdoc-metadata.json" in the package folder.
+     *
+     * SUPPORTED TOKENS: <projectFolder>, <packageName>, <unscopedPackageName>
+     * DEFAULT VALUE: "<lookup>"
+     */
+    // "tsdocMetadataFilePath": "<projectFolder>/dist/tsdoc-metadata.json"
+  },
+
+  /**
+   * Specifies what type of newlines API Extractor should use when writing output files.  By default, the output files
+   * will be written with Windows-style newlines.  To use POSIX-style newlines, specify "lf" instead.
+   * To use the OS's default newline kind, specify "os".
+   *
+   * DEFAULT VALUE: "crlf"
+   */
+  // "newlineKind": "crlf",
+
+  /**
+   * Configures how API Extractor reports error and warning messages produced during analysis.
+   *
+   * There are three sources of messages:  compiler messages, API Extractor messages, and TSDoc messages.
+   */
+  "messages": {
+    /**
+     * Configures handling of diagnostic messages reported by the TypeScript compiler engine while analyzing
+     * the input .d.ts files.
+     *
+     * TypeScript message identifiers start with "TS" followed by an integer.  For example: "TS2551"
+     *
+     * DEFAULT VALUE:  A single "default" entry with logLevel=warning.
+     */
+    "compilerMessageReporting": {
+      /**
+       * Configures the default routing for messages that don't match an explicit rule in this table.
+       */
+      "default": {
+        /**
+         * Specifies whether the message should be written to the the tool's output log.  Note that
+         * the "addToApiReportFile" property may supersede this option.
+         *
+         * Possible values: "error", "warning", "none"
+         *
+         * Errors cause the build to fail and return a nonzero exit code.  Warnings cause a production build fail
+         * and return a nonzero exit code.  For a non-production build (e.g. when "api-extractor run" includes
+         * the "--local" option), the warning is displayed but the build will not fail.
+         *
+         * DEFAULT VALUE: "warning"
+         */
+        "logLevel": "warning",
+
+        /**
+         * When addToApiReportFile is true:  If API Extractor is configured to write an API report file (.api.md),
+         * then the message will be written inside that file; otherwise, the message is instead logged according to
+         * the "logLevel" option.
+         *
+         * DEFAULT VALUE: false
+         */
+        // "addToApiReportFile": false
+      },
+
+      // "TS2551": {
+      //   "logLevel": "warning",
+      //   "addToApiReportFile": true
+      // },
+      //
+      // . . .
+    },
+
+    /**
+     * Configures handling of messages reported by API Extractor during its analysis.
+     *
+     * API Extractor message identifiers start with "ae-".  For example: "ae-extra-release-tag"
+     *
+     * DEFAULT VALUE: See api-extractor-defaults.json for the complete table of extractorMessageReporting mappings
+     */
+    "extractorMessageReporting": {
+      "default": {
+        "logLevel": "warning",
+        // "addToApiReportFile": false
+      },
+
+      // "ae-extra-release-tag": {
+      //   "logLevel": "warning",
+      //   "addToApiReportFile": true
+      // },
+      //
+      // . . .
+    },
+
+    /**
+     * Configures handling of messages reported by the TSDoc parser when analyzing code comments.
+     *
+     * TSDoc message identifiers start with "tsdoc-".  For example: "tsdoc-link-tag-unescaped-text"
+     *
+     * DEFAULT VALUE:  A single "default" entry with logLevel=warning.
+     */
+    "tsdocMessageReporting": {
+      "default": {
+        "logLevel": "warning",
+        // "addToApiReportFile": false
+      }
+
+      // "tsdoc-link-tag-unescaped-text": {
+      //   "logLevel": "warning",
+      //   "addToApiReportFile": true
+      // },
+      //
+      // . . .
+    }
+  }
+
+}
diff --git a/package.json b/package.json
index 39ddb1bb69b..f4aa97cd66d 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,9 @@
     "docgen": "yarn docgen:js; yarn docgen:node",
     "prettier": "prettier --config .prettierrc --write '**/*.{ts,js}'",
     "lint": "lerna run --scope @firebase/* --scope rxfire lint",
-    "size-report": "node scripts/report_binary_size.js"
+    "size-report": "node scripts/report_binary_size.js",
+    "api-report": "lerna run --scope @firebase/*-exp api-report",
+    "docgen:exp": "node scripts/exp/docgen.js"
   },
   "repository": {
     "type": "git",
@@ -125,7 +127,9 @@
     "typescript": "3.8.3",
     "watch": "1.0.2",
     "webpack": "4.42.0",
-    "yargs": "15.3.1"
+    "yargs": "15.3.1",
+    "@microsoft/api-extractor": "7.7.8",
+    "@microsoft/api-documenter": "7.7.12"
   },
   "husky": {
     "hooks": {
diff --git a/packages-exp/app-exp/api-extractor.json b/packages-exp/app-exp/api-extractor.json
new file mode 100644
index 00000000000..da5cd700796
--- /dev/null
+++ b/packages-exp/app-exp/api-extractor.json
@@ -0,0 +1,5 @@
+{
+    "extends": "../../config/api-extractor.json",
+    // Point it to your entry point d.ts file. 
+    "mainEntryPointFilePath": "<projectFolder>/dist/esm5/packages-exp/app-exp/src/index.d.ts"
+}
\ No newline at end of file
diff --git a/packages-exp/app-exp/package.json b/packages-exp/app-exp/package.json
index 9ded28fda44..ba9cf1b9afd 100644
--- a/packages-exp/app-exp/package.json
+++ b/packages-exp/app-exp/package.json
@@ -20,7 +20,11 @@
     "test:browser": "karma start --single-run",
     "test:node": "TS_NODE_COMPILER_OPTIONS='{\"module\":\"commonjs\"}' nyc --reporter lcovonly -- mocha src/**/*.test.ts --opts ../../config/mocha.node.opts",
     "type-check": "tsc -p . --noEmit",
-    "prepare": "yarn build"
+    "prepare": "yarn build",
+    "api-report": "api-extractor run --local --verbose",
+    "predoc": "node ../../scripts/exp/remove_exp.js temp",
+    "doc": "api-documenter markdown --input temp --output docs",
+    "build:doc": "yarn build && yarn api-report && yarn doc"
   },
   "dependencies": {
     "@firebase/app-types-exp": "0.800.0",
diff --git a/packages-exp/app-exp/src/api.test.ts b/packages-exp/app-exp/src/api.test.ts
index b0dac2e2543..2f91c258380 100644
--- a/packages-exp/app-exp/src/api.test.ts
+++ b/packages-exp/app-exp/src/api.test.ts
@@ -29,7 +29,7 @@ import {
   onLog
 } from './api';
 import { DEFAULT_ENTRY_NAME } from './constants';
-import { FirebaseAppInternal } from '@firebase/app-types-exp';
+import { _FirebaseAppInternal } from '@firebase/app-types-exp';
 import {
   clearComponents,
   components,
@@ -109,7 +109,7 @@ describe('API tests', () => {
       registerComponent(comp1);
       registerComponent(comp2);
 
-      const app = initializeApp({}) as FirebaseAppInternal;
+      const app = initializeApp({}) as _FirebaseAppInternal;
       // -1 here to not count the FirebaseApp provider that's added during initializeApp
       expect(app.container.getProviders().length - 1).to.equal(components.size);
     });
@@ -160,10 +160,10 @@ describe('API tests', () => {
   describe('deleteApp', () => {
     it('marks an App as deleted', async () => {
       const app = initializeApp({});
-      expect((app as FirebaseAppInternal).isDeleted).to.be.false;
+      expect((app as _FirebaseAppInternal).isDeleted).to.be.false;
 
       await deleteApp(app).catch(() => {});
-      expect((app as FirebaseAppInternal).isDeleted).to.be.true;
+      expect((app as _FirebaseAppInternal).isDeleted).to.be.true;
     });
 
     it('removes App from the cache', () => {
diff --git a/packages-exp/app-exp/src/api.ts b/packages-exp/app-exp/src/api.ts
index 716c1b2fed2..23ed3341a99 100644
--- a/packages-exp/app-exp/src/api.ts
+++ b/packages-exp/app-exp/src/api.ts
@@ -19,7 +19,7 @@ import {
   FirebaseApp,
   FirebaseOptions,
   FirebaseAppConfig,
-  FirebaseAppInternal
+  _FirebaseAppInternal
 } from '@firebase/app-types-exp';
 import { DEFAULT_ENTRY_NAME, PLATFORM_LOG_STRING } from './constants';
 import { ERROR_FACTORY, AppError } from './errors';
@@ -43,19 +43,21 @@ import {
 
 /**
  * The current SDK version.
+ *
+ * @public
  */
 export const SDK_VERSION = version;
 
 /**
- * Creates and initializes a Firebase {@link @firebase/app-types-exp#FirebaseApp app} instance.
+ * Creates and initializes a FirebaseApp instance.
  *
  * See
  * {@link
  *   https://firebase.google.com/docs/web/setup#add_firebase_to_your_app
- *   Add Firebase to your app} and
+ *   | Add Firebase to your app} and
  * {@link
  *   https://firebase.google.com/docs/web/setup#multiple-projects
- *   Initialize multiple projects} for detailed documentation.
+ *   | Initialize multiple projects} for detailed documentation.
  *
  * @example
  * ```javascript
@@ -82,19 +84,29 @@ export const SDK_VERSION = version;
  * }, "otherApp");
  * ```
  *
- * @param options Options to configure the app's services.
- * @param name Optional name of the app to initialize. If no name
+ * @param options - Options to configure the app's services.
+ * @param name - Optional name of the app to initialize. If no name
  *   is provided, the default is `"[DEFAULT]"`.
  *
- * @return {!firebase.app.App} The initialized app.
+ * @returns The initialized app.
+ *
+ * @public
  */
 export function initializeApp(
   options: FirebaseOptions,
-  config?: FirebaseAppConfig
+  name?: string
 ): FirebaseApp;
+/**
+ * Creates and initializes a FirebaseApp instance.
+ *
+ * @param options - Options to configure the app's services.
+ * @param config - FirebaseApp Configuration
+ *
+ * @public
+ */
 export function initializeApp(
   options: FirebaseOptions,
-  name?: string
+  config?: FirebaseAppConfig
 ): FirebaseApp;
 export function initializeApp(
   options: FirebaseOptions,
@@ -135,7 +147,7 @@ export function initializeApp(
 }
 
 /**
- * Retrieves a Firebase {@link @firebase/app-types-exp#FirebaseApp app} instance.
+ * Retrieves a FirebaseApp instance.
  *
  * When called with no arguments, the default app is returned. When an app name
  * is provided, the app corresponding to that name is returned.
@@ -155,11 +167,13 @@ export function initializeApp(
  * const otherApp = getApp("otherApp");
  * ```
  *
- * @param name Optional name of the app to return. If no name is
+ * @param name - Optional name of the app to return. If no name is
  *   provided, the default is `"[DEFAULT]"`.
  *
- * @return The app corresponding to the provided app name.
+ * @returns The app corresponding to the provided app name.
  *   If no app name is provided, the default app is returned.
+ *
+ * @public
  */
 export function getApp(name: string = DEFAULT_ENTRY_NAME): FirebaseApp {
   const app = apps.get(name);
@@ -172,6 +186,7 @@ export function getApp(name: string = DEFAULT_ENTRY_NAME): FirebaseApp {
 
 /**
  * A (read-only) array of all initialized apps.
+ * @public
  */
 export function getApps(): FirebaseApp[] {
   return Array.from(apps.values());
@@ -191,23 +206,27 @@ export function getApps(): FirebaseApp[] {
  *     console.log("Error deleting app:", error);
  *   });
  * ```
+ *
+ * @public
  */
 export async function deleteApp(app: FirebaseApp): Promise<void> {
   const name = app.name;
   if (apps.has(name)) {
     apps.delete(name);
-    await (app as FirebaseAppInternal).container
+    await (app as _FirebaseAppInternal).container
       .getProviders()
       .map(provider => provider.delete());
-    (app as FirebaseAppInternal).isDeleted = true;
+    (app as _FirebaseAppInternal).isDeleted = true;
   }
 }
 
 /**
  * Registers a library's name and version for platform logging purposes.
- * @param library Name of 1p or 3p library (e.g. firestore, angularfire)
- * @param version Current version of that library.
- * @param variant Bundle variant, e.g., node, rn, etc.
+ * @param library - Name of 1p or 3p library (e.g. firestore, angularfire)
+ * @param version - Current version of that library.
+ * @param variant - Bundle variant, e.g., node, rn, etc.
+ *
+ * @public
  */
 export function registerVersion(
   libraryKeyOrName: string,
@@ -253,8 +272,10 @@ export function registerVersion(
 
 /**
  * Sets log handler for all Firebase SDKs.
- * @param logCallback An optional custom log handler that executes user code whenever
+ * @param logCallback - An optional custom log handler that executes user code whenever
  * the Firebase SDK makes a logging call.
+ *
+ * @public
  */
 export function onLog(
   logCallback: LogCallback | null,
@@ -274,6 +295,8 @@ export function onLog(
  * All of the log types above the current log level are captured (i.e. if
  * you set the log level to `info`, errors are logged, but `debug` and
  * `verbose` logs are not).
+ *
+ * @public
  */
 export function setLogLevel(logLevel: LogLevel): void {
   setLogLevelImpl(logLevel);
diff --git a/packages-exp/app-exp/src/firebaseApp.test.ts b/packages-exp/app-exp/src/firebaseApp.test.ts
index 8cbb9323075..12e56b41ff7 100644
--- a/packages-exp/app-exp/src/firebaseApp.test.ts
+++ b/packages-exp/app-exp/src/firebaseApp.test.ts
@@ -19,7 +19,7 @@ import { expect } from 'chai';
 import '../test/setup';
 import { FirebaseAppImpl } from './firebaseApp';
 import { ComponentContainer } from '@firebase/component';
-import { FirebaseAppInternal } from '@firebase/app-types-exp';
+import { _FirebaseAppInternal } from '@firebase/app-types-exp';
 
 describe('FirebaseAppNext', () => {
   it('has various accessors', () => {
@@ -71,7 +71,7 @@ describe('FirebaseAppNext', () => {
     );
 
     expect(() => app.name).to.not.throw();
-    ((app as unknown) as FirebaseAppInternal).isDeleted = true;
+    ((app as unknown) as _FirebaseAppInternal).isDeleted = true;
 
     expect(() => {
       app.name;
diff --git a/packages-exp/app-exp/src/index.ts b/packages-exp/app-exp/src/index.ts
index 3d0a47ad8f8..79b112bfed5 100644
--- a/packages-exp/app-exp/src/index.ts
+++ b/packages-exp/app-exp/src/index.ts
@@ -1,7 +1,7 @@
 /**
  * Firebase App
  *
- * @remark This package coordinates the communication between the different Firebase components
+ * @remarks This package coordinates the communication between the different Firebase components
  * @packageDocumentation
  */
 
diff --git a/packages-exp/app-exp/src/internal.test.ts b/packages-exp/app-exp/src/internal.test.ts
index fcc8bc3ab9e..5787cf8fd3e 100644
--- a/packages-exp/app-exp/src/internal.test.ts
+++ b/packages-exp/app-exp/src/internal.test.ts
@@ -27,7 +27,7 @@ import {
   components,
   clearComponents
 } from './internal';
-import { FirebaseAppInternal } from '@firebase/app-types-exp';
+import { _FirebaseAppInternal } from '@firebase/app-types-exp';
 
 declare module '@firebase/component' {
   interface NameServiceMapping {
@@ -44,7 +44,7 @@ describe('Internal API tests', () => {
 
   describe('addComponent', () => {
     it('registers component with App', () => {
-      const app = initializeApp({}) as FirebaseAppInternal;
+      const app = initializeApp({}) as _FirebaseAppInternal;
       const testComp = createTestComponent('test');
 
       addComponent(app, testComp);
@@ -55,7 +55,7 @@ describe('Internal API tests', () => {
     });
 
     it('does NOT throw registering duplicate components', () => {
-      const app = initializeApp({}) as FirebaseAppInternal;
+      const app = initializeApp({}) as _FirebaseAppInternal;
       const testComp = createTestComponent('test');
 
       addComponent(app, testComp);
@@ -69,7 +69,7 @@ describe('Internal API tests', () => {
 
   describe('addOrOverwriteComponent', () => {
     it('registers component with App', () => {
-      const app = initializeApp({}) as FirebaseAppInternal;
+      const app = initializeApp({}) as _FirebaseAppInternal;
       const testComp = createTestComponent('test');
 
       addOrOverwriteComponent(app, testComp);
@@ -80,7 +80,7 @@ describe('Internal API tests', () => {
     });
 
     it('overwrites an existing component with the same name', () => {
-      const app = initializeApp({}) as FirebaseAppInternal;
+      const app = initializeApp({}) as _FirebaseAppInternal;
       const testComp1 = createTestComponent('test');
       const testComp2 = createTestComponent('test');
 
@@ -99,8 +99,8 @@ describe('Internal API tests', () => {
     });
 
     it('caches a component and registers it with all Apps', () => {
-      const app1 = initializeApp({}) as FirebaseAppInternal;
-      const app2 = initializeApp({}, 'app2') as FirebaseAppInternal;
+      const app1 = initializeApp({}) as _FirebaseAppInternal;
+      const app2 = initializeApp({}, 'app2') as _FirebaseAppInternal;
 
       const stub1 = stub(app1.container, 'addComponent').callThrough();
       const stub2 = stub(app2.container, 'addComponent').callThrough();
diff --git a/packages-exp/app-exp/src/internal.ts b/packages-exp/app-exp/src/internal.ts
index 7a7ff1cae99..3d7c4390b6b 100644
--- a/packages-exp/app-exp/src/internal.ts
+++ b/packages-exp/app-exp/src/internal.ts
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-import { FirebaseAppInternal, FirebaseApp } from '@firebase/app-types-exp';
+import { _FirebaseAppInternal, FirebaseApp } from '@firebase/app-types-exp';
 import { Component, Provider, Name } from '@firebase/component';
 import { logger } from './logger';
 
@@ -31,7 +31,7 @@ export const components = new Map<string, Component<any>>();
  */
 export function addComponent(app: FirebaseApp, component: Component): void {
   try {
-    (app as FirebaseAppInternal).container.addComponent(component);
+    (app as _FirebaseAppInternal).container.addComponent(component);
   } catch (e) {
     logger.debug(
       `Component ${component.name} failed to register with FirebaseApp ${app.name}`,
@@ -44,7 +44,7 @@ export function addOrOverwriteComponent(
   app: FirebaseApp,
   component: Component
 ): void {
-  (app as FirebaseAppInternal).container.addOrOverwriteComponent(component);
+  (app as _FirebaseAppInternal).container.addOrOverwriteComponent(component);
 }
 
 /**
@@ -66,7 +66,7 @@ export function registerComponent(component: Component): boolean {
 
   // add the component to existing app instances
   for (const app of apps.values()) {
-    addComponent(app as FirebaseAppInternal, component);
+    addComponent(app as _FirebaseAppInternal, component);
   }
 
   return true;
@@ -76,7 +76,7 @@ export function getProvider<T extends Name>(
   app: FirebaseApp,
   name: T
 ): Provider<T> {
-  return (app as FirebaseAppInternal).container.getProvider(name);
+  return (app as _FirebaseAppInternal).container.getProvider(name);
 }
 
 /**
diff --git a/packages-exp/app-types-exp/api-extractor.json b/packages-exp/app-types-exp/api-extractor.json
new file mode 100644
index 00000000000..42f37a88c4b
--- /dev/null
+++ b/packages-exp/app-types-exp/api-extractor.json
@@ -0,0 +1,5 @@
+{
+    "extends": "../../config/api-extractor.json",
+    // Point it to your entry point d.ts file. 
+    "mainEntryPointFilePath": "<projectFolder>/index.d.ts"
+}
\ No newline at end of file
diff --git a/packages-exp/app-types-exp/index.d.ts b/packages-exp/app-types-exp/index.d.ts
index 6c794b835f6..59f6c6d00b9 100644
--- a/packages-exp/app-types-exp/index.d.ts
+++ b/packages-exp/app-types-exp/index.d.ts
@@ -22,8 +22,9 @@ import { ComponentContainer } from '@firebase/component';
  * services.
  *
  * Do not call this constructor directly. Instead, use
- * {@link firebase.initializeApp|`firebase.initializeApp()`} to create an app.
+ * {@link @firebase/app-exp#(initializeApp:1) | initializeApp()} to create an app.
  *
+ * @public
  */
 export interface FirebaseApp {
   /**
@@ -49,7 +50,7 @@ export interface FirebaseApp {
 
   /**
    * The (read-only) configuration options for this app. These are the original
-   * parameters given in {@link @firebase/app-exp#initializApp}.
+   * parameters given in {@link @firebase/app-exp#(initializeApp:1) | initializeApp()}.
    *
    * @example
    * ```javascript
@@ -65,12 +66,18 @@ export interface FirebaseApp {
   automaticDataCollectionEnabled: boolean;
 }
 
-export interface FirebaseAppInternal extends FirebaseApp {
+/**
+ * @internal
+ */
+export interface _FirebaseAppInternal extends FirebaseApp {
   container: ComponentContainer;
   isDeleted: boolean;
   checkDestroyed(): void;
 }
 
+/**
+ * @public
+ */
 export interface FirebaseOptions {
   apiKey?: string;
   authDomain?: string;
@@ -82,11 +89,17 @@ export interface FirebaseOptions {
   measurementId?: string;
 }
 
+/**
+ * @public
+ */
 export interface FirebaseAppConfig {
   name?: string;
   automaticDataCollectionEnabled?: boolean;
 }
 
+/**
+ * @public
+ */
 export interface PlatformLoggerService {
   getPlatformInfoString(): string;
 }
diff --git a/packages-exp/app-types-exp/package.json b/packages-exp/app-types-exp/package.json
index 6f36d98adcd..ea6348a0062 100644
--- a/packages-exp/app-types-exp/package.json
+++ b/packages-exp/app-types-exp/package.json
@@ -6,7 +6,11 @@
   "author": "Firebase <firebase-support@google.com> (https://firebase.google.com/)",
   "license": "Apache-2.0",
   "scripts": {
-    "test": "tsc"
+    "test": "tsc",
+    "api-report": "api-extractor run --local --verbose",
+    "predoc": "node ../../scripts/exp/remove_exp.js temp",
+    "doc": "api-documenter markdown --input temp --output docs",
+    "build:doc": "yarn api-report && yarn doc"
   },
   "files": [
     "index.d.ts",
diff --git a/scripts/exp/docgen.js b/scripts/exp/docgen.js
new file mode 100644
index 00000000000..af6cb23b1fc
--- /dev/null
+++ b/scripts/exp/docgen.js
@@ -0,0 +1,77 @@
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const { spawn } = require('child-process-promise');
+const { mapWorkspaceToPackages } = require('../release/utils/workspace');
+const { projectRoot } = require('../utils');
+const { removeExpSuffix } = require('./remove-exp');
+const fs = require('fs');
+const glob = require('glob');
+
+const tmpDir = `${projectRoot}/temp`;
+// create *.api.json files
+async function generateDocs() {
+  // TODO: change yarn command once exp packages become official
+  await spawn('yarn', ['build:exp'], {
+    stdio: 'inherit'
+  });
+
+  await spawn('yarn', ['api-report'], {
+    stdio: 'inherit'
+  });
+
+  if (!fs.existsSync(tmpDir)) {
+    fs.mkdirSync(tmpDir);
+  }
+
+  // TODO: Throw error if path doesn't exist, once all packages add markdown support.
+  const apiJsonDirectories = (
+    await mapWorkspaceToPackages([
+      `${projectRoot}/packages/*`,
+      `${projectRoot}/packages-exp/*`
+    ])
+  )
+    .map(path => `${path}/temp`)
+    .filter(path => fs.existsSync(path));
+
+  for (const dir of apiJsonDirectories) {
+    const paths = await new Promise(resolve =>
+      glob(`${dir}/*.api.json`, (err, paths) => {
+        if (err) throw err;
+        resolve(paths);
+      })
+    );
+
+    if (paths.length === 0) {
+      throw Error(`*.api.json file is missing in ${dir}`);
+    }
+
+    // there will be only 1 api.json file
+    const fileName = paths[0].split('/').pop();
+    fs.copyFileSync(paths[0], `${tmpDir}/${fileName}`);
+  }
+
+  // Generate docs without the -exp suffix
+  removeExpSuffix(tmpDir);
+  await spawn(
+    'npx',
+    ['api-documenter', 'markdown', '--input', 'temp', '--output', 'docs-exp'],
+    { stdio: 'inherit' }
+  );
+}
+
+generateDocs();
diff --git a/scripts/exp/remove-exp.js b/scripts/exp/remove-exp.js
new file mode 100644
index 00000000000..44f24429e8e
--- /dev/null
+++ b/scripts/exp/remove-exp.js
@@ -0,0 +1,45 @@
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Replace "-exp" with "" in all files within the directory
+ */
+const { argv } = require('yargs');
+const path = require('path');
+const { readdirSync, statSync, readFileSync, writeFileSync } = require('fs');
+
+// can be used in command line
+if (argv._[0]) {
+  const dir = path.resolve(argv._[0]);
+  removeExpSuffix(dir);
+}
+
+function removeExpSuffix(dir) {
+  for (const file of readdirSync(dir)) {
+    const filePath = `${dir}/${file}`;
+    if (statSync(filePath).isFile()) {
+      const content = readFileSync(filePath, 'utf-8');
+
+      // replace -exp with empty string
+      const modified = content.replace(/-exp/g, '');
+
+      writeFileSync(filePath, modified, 'utf-8');
+    }
+  }
+}
+
+exports.removeExpSuffix = removeExpSuffix;
diff --git a/scripts/release/utils/constants.js b/scripts/release/utils/constants.js
deleted file mode 100644
index 82ad2a42b77..00000000000
--- a/scripts/release/utils/constants.js
+++ /dev/null
@@ -1,19 +0,0 @@
-/**
- * @license
- * Copyright 2018 Google Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-const { dirname, resolve } = require('path');
-exports.projectRoot = dirname(resolve(__dirname, '../../../package.json'));
diff --git a/scripts/release/utils/git.js b/scripts/release/utils/git.js
index 6e77953001f..b75d5266b59 100644
--- a/scripts/release/utils/git.js
+++ b/scripts/release/utils/git.js
@@ -1,6 +1,6 @@
 /**
  * @license
- * Copyright 2018 Google Inc.
+ * Copyright 2018 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,7 @@
  */
 
 const simpleGit = require('simple-git/promise');
-const { projectRoot: root } = require('./constants');
+const { projectRoot: root } = require('../../utils');
 const git = simpleGit(root);
 const { exec } = require('child-process-promise');
 const ora = require('ora');
diff --git a/scripts/release/utils/lerna.js b/scripts/release/utils/lerna.js
index 721a6fdebd3..af7dce2f68e 100644
--- a/scripts/release/utils/lerna.js
+++ b/scripts/release/utils/lerna.js
@@ -1,6 +1,6 @@
 /**
  * @license
- * Copyright 2018 Google Inc.
+ * Copyright 2018 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,7 +17,7 @@
 
 const { exec } = require('child-process-promise');
 const npmRunPath = require('npm-run-path');
-const { projectRoot: root } = require('./constants');
+const { projectRoot: root } = require('../../utils');
 
 function getLernaUpdateJson() {
   let cache;
diff --git a/scripts/release/utils/workspace.js b/scripts/release/utils/workspace.js
index fd1214943cb..92574ca2c3f 100644
--- a/scripts/release/utils/workspace.js
+++ b/scripts/release/utils/workspace.js
@@ -1,6 +1,6 @@
 /**
  * @license
- * Copyright 2018 Google Inc.
+ * Copyright 2018 Google LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,7 @@
  */
 
 const glob = require('glob');
-const { projectRoot: root } = require('./constants');
+const { projectRoot: root } = require('../../utils');
 const { workspaces: rawWorkspaces } = require(`${root}/package.json`);
 const workspaces = rawWorkspaces.map(workspace => `${root}/${workspace}`);
 const { DepGraph } = require('dependency-graph');
@@ -26,15 +26,6 @@ const { writeFile: _writeFile, existsSync } = require('fs');
 const writeFile = promisify(_writeFile);
 const clone = require('clone');
 
-function filterObjectByKey(raw, filter) {
-  return Object.keys(raw)
-    .filter(filter)
-    .reduce((obj, key) => {
-      obj[key] = raw[key];
-      return obj;
-    }, {});
-}
-
 function mapWorkspaceToPackages(workspaces) {
   return Promise.all(
     workspaces.map(
@@ -48,6 +39,7 @@ function mapWorkspaceToPackages(workspaces) {
     )
   ).then(paths => paths.reduce((arr, val) => arr.concat(val), []));
 }
+exports.mapWorkspaceToPackages = mapWorkspaceToPackages;
 
 function mapPackagestoPkgJson(packagePaths) {
   return packagePaths
diff --git a/scripts/report_binary_size.js b/scripts/report_binary_size.js
index 8a1379ffb45..e4f217a1171 100644
--- a/scripts/report_binary_size.js
+++ b/scripts/report_binary_size.js
@@ -21,8 +21,6 @@ const { execSync } = require('child_process');
 const https = require('https');
 const terser = require('terser');
 
-const repoRoot = resolve(__dirname, '..');
-
 const runId = process.env.GITHUB_RUN_ID || 'local-run-id';
 
 const METRICS_SERVICE_URL = process.env.METRICS_SERVICE_URL;
@@ -70,9 +68,7 @@ function generateReportForNPMPackages() {
   ];
 
   const packageInfo = JSON.parse(
-    execSync('npx lerna ls --json --scope @firebase/*', {
-      cwd: repoRoot
-    }).toString()
+    execSync('npx lerna ls --json --scope @firebase/*').toString()
   );
 
   for (const package of packageInfo) {
diff --git a/scripts/utils.js b/scripts/utils.js
new file mode 100644
index 00000000000..15760c23677
--- /dev/null
+++ b/scripts/utils.js
@@ -0,0 +1,61 @@
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const { dirname, resolve } = require('path');
+const simpleGit = require('simple-git/promise');
+const { exec } = require('child-process-promise');
+
+const projectRoot = dirname(resolve(__dirname, '../package.json'));
+exports.projectRoot = projectRoot;
+
+async function getChangedFiles() {
+  console.log(projectRoot);
+  const git = simpleGit(projectRoot);
+  const diff = await git.diff(['--name-only', 'origin/master...HEAD']);
+  const changedFiles = diff.split('\n');
+
+  return changedFiles;
+}
+exports.getChangedFiles = getChangedFiles;
+
+async function getChangedPackages() {
+  const changedPackages = new Set();
+  for (const filename of await getChangedFiles()) {
+    // Check for changed files inside package dirs.
+    const match = filename.match('^(packages(-exp)?/[a-zA-Z0-9-]+)/.*');
+    if (match && match[1]) {
+      const changedPackage = require(resolve(
+        projectRoot,
+        match[1],
+        'package.json'
+      ));
+      changedPackages.add(changedPackage.name);
+    }
+  }
+  return Array.from(changedPackages.values());
+}
+exports.getChangedPackages = getChangedPackages;
+
+exports.getPackageInfo = async function(
+  { includePrivate } = { includePrivate: true }
+) {
+  const packageInfo = JSON.parse(
+    (await exec(`npx lerna ls ${includePrivate ? '-la' : ''} --json`)).stdout
+  );
+
+  return packageInfo;
+};
diff --git a/tools/gitHooks/api-report.js b/tools/gitHooks/api-report.js
new file mode 100644
index 00000000000..f5f598fd5c4
--- /dev/null
+++ b/tools/gitHooks/api-report.js
@@ -0,0 +1,68 @@
+/**
+ * @license
+ * Copyright 2020 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * generate API reports in changed packages
+ */
+
+const {
+  getChangedPackages,
+  getPackageInfo,
+  projectRoot
+} = require('../../scripts/utils');
+const { execSync } = require('child_process');
+const ora = require('ora');
+const simpleGit = require('simple-git/promise');
+
+const git = simpleGit(projectRoot);
+
+async function doApiReportsCommit() {
+  const changedPackages = await getChangedPackages();
+  const packageInfo = await getPackageInfo();
+  const packageLocations = [];
+  for (const packageName of changedPackages) {
+    const packageDesc = packageInfo.find(info => info.name === packageName);
+    if (packageDesc) {
+      const packageJson = require(`${packageDesc.location}/package.json`);
+
+      if (packageJson && packageJson.scripts['api-report']) {
+        const apiReportSpinner = ora(
+          ` Creating API report for ${packageName}`
+        ).start();
+        packageLocations.push(packageDesc.location);
+        execSync(`yarn api-report`, { cwd: packageDesc.location });
+        apiReportSpinner.stopAndPersist({
+          symbol: '✅'
+        });
+      }
+    }
+  }
+
+  const hasDiff = await git.diff();
+
+  if (!hasDiff) return;
+
+  const gitSpinner = ora(' Creating automated API reports commit').start();
+  await git.add('.');
+
+  await git.commit('[AUTOMATED]: API Reports');
+  gitSpinner.stopAndPersist({
+    symbol: '✅'
+  });
+}
+
+exports.doApiReportsCommit = doApiReportsCommit;
diff --git a/tools/gitHooks/prepush.js b/tools/gitHooks/prepush.js
index b52a41cf9cb..8ff853564e3 100644
--- a/tools/gitHooks/prepush.js
+++ b/tools/gitHooks/prepush.js
@@ -17,6 +17,7 @@
 
 const { doPrettierCommit } = require('./prettier');
 const { doLicenseCommit } = require('./license');
+const { doApiReportsCommit } = require('./api-report');
 const { resolve } = require('path');
 const simpleGit = require('simple-git/promise');
 const chalk = require('chalk');
@@ -57,6 +58,9 @@ $ git stash pop
     // Validate License headers exist
     await doLicenseCommit(changedFiles);
 
+    // Generate API reports
+    await doApiReportsCommit();
+
     console.log(chalk`
 Pre-Push Validation Succeeded
 
diff --git a/yarn.lock b/yarn.lock
index 933e487e34c..5c88f1ef707 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1787,6 +1787,69 @@
     npmlog "^4.1.2"
     write-file-atomic "^2.3.0"
 
+"@microsoft/api-documenter@7.7.12":
+  version "7.7.12"
+  resolved "https://registry.npmjs.org/@microsoft/api-documenter/-/api-documenter-7.7.12.tgz#e355cd24caefbf831686b684c09918906894ff5c"
+  integrity sha512-FVd0c+DEz+HntBmtRsTTslVvBagx0FqGC+rzF8jnVDJbiW6xkwjwfTj/VKqNNdz821sEPp+eAJgGh7s0Nyx3Iw==
+  dependencies:
+    "@microsoft/api-extractor-model" "7.7.7"
+    "@microsoft/node-core-library" "3.19.3"
+    "@microsoft/ts-command-line" "4.3.10"
+    "@microsoft/tsdoc" "0.12.14"
+    colors "~1.2.1"
+    js-yaml "~3.13.1"
+    resolve "1.8.1"
+
+"@microsoft/api-extractor-model@7.7.7":
+  version "7.7.7"
+  resolved "https://registry.npmjs.org/@microsoft/api-extractor-model/-/api-extractor-model-7.7.7.tgz#1d15eae7a19b72abbfca9053f200fe79b6f9d755"
+  integrity sha512-822kyHMEx2sl+KnBioEiFoTIXuz/4pYBo94nQ4AMqb9BFvY9I1AZUPtC4HFh2zcXQqpFLpKKC55s/o8UOze2wQ==
+  dependencies:
+    "@microsoft/node-core-library" "3.19.3"
+    "@microsoft/tsdoc" "0.12.14"
+
+"@microsoft/api-extractor@7.7.8":
+  version "7.7.8"
+  resolved "https://registry.npmjs.org/@microsoft/api-extractor/-/api-extractor-7.7.8.tgz#19b0bca8a2113d4ded55a270266bc2b802de1a43"
+  integrity sha512-XNO6Dk6ByfJq24Cn1/j0B0F16ZtwYnEC/sxgB/M0wTphBdBlHjRXZmxofmjirBBj9f7vG4UJ18IOIZRLbhGFPw==
+  dependencies:
+    "@microsoft/api-extractor-model" "7.7.7"
+    "@microsoft/node-core-library" "3.19.3"
+    "@microsoft/ts-command-line" "4.3.10"
+    "@microsoft/tsdoc" "0.12.14"
+    colors "~1.2.1"
+    lodash "~4.17.15"
+    resolve "1.8.1"
+    source-map "~0.6.1"
+    typescript "~3.7.2"
+
+"@microsoft/node-core-library@3.19.3":
+  version "3.19.3"
+  resolved "https://registry.npmjs.org/@microsoft/node-core-library/-/node-core-library-3.19.3.tgz#cf09ddb2905a29b32956d4a88f9d035a00637be9"
+  integrity sha512-rJ+hT6+XK5AESbhn31YBnHKpZSFKCmqHCRZyK9+jyWwav1HXv0qzuXnFvnyrO0MZyJ6rH0seWOZVWbU5KGv1tg==
+  dependencies:
+    "@types/node" "10.17.13"
+    colors "~1.2.1"
+    fs-extra "~7.0.1"
+    jju "~1.4.0"
+    semver "~5.3.0"
+    timsort "~0.3.0"
+    z-schema "~3.18.3"
+
+"@microsoft/ts-command-line@4.3.10":
+  version "4.3.10"
+  resolved "https://registry.npmjs.org/@microsoft/ts-command-line/-/ts-command-line-4.3.10.tgz#fcb4f5ea43c93d17db6cc810bbee39ea32b2a86d"
+  integrity sha512-AgxArGqPt0H5WTo3fxNFP3Blm3obkCCopVG9kwIo+/mMdXaj6qMDn6+8Bv8+5Nke3CvvXpKAZtu3IaGY5cV1Hg==
+  dependencies:
+    "@types/argparse" "1.0.33"
+    argparse "~1.0.9"
+    colors "~1.2.1"
+
+"@microsoft/tsdoc@0.12.14":
+  version "0.12.14"
+  resolved "https://registry.npmjs.org/@microsoft/tsdoc/-/tsdoc-0.12.14.tgz#0e0810a0a174e50e22dfe8edb30599840712f22d"
+  integrity sha512-518yewjSga1jLdiLrcmpMFlaba5P+50b0TWNFUpC+SL9Yzf0kMi57qw+bMl+rQ08cGqH1vLx4eg9YFUbZXgZ0Q==
+
 "@mrmlnc/readdir-enhanced@^2.2.1":
   version "2.2.1"
   resolved "https://registry.npmjs.org/@mrmlnc/readdir-enhanced/-/readdir-enhanced-2.2.1.tgz#524af240d1a360527b730475ecfa1344aa540dde"
@@ -2003,6 +2066,11 @@
   resolved "https://registry.npmjs.org/@testim/chrome-version/-/chrome-version-1.0.7.tgz#0cd915785ec4190f08a3a6acc9b61fc38fb5f1a9"
   integrity sha512-8UT/J+xqCYfn3fKtOznAibsHpiuDshCb0fwgWxRazTT19Igp9ovoXMPhXyLD6m3CKQGTMHgqoxaFfMWaL40Rnw==
 
+"@types/argparse@1.0.33":
+  version "1.0.33"
+  resolved "https://registry.npmjs.org/@types/argparse/-/argparse-1.0.33.tgz#2728669427cdd74a99e53c9f457ca2866a37c52d"
+  integrity sha512-VQgHxyPMTj3hIlq9SY1mctqx+Jj8kpQfoLvDlVSDNOyuYs8JYfkuY3OW/4+dO657yPmNhHpePRx0/Tje5ImNVQ==
+
 "@types/body-parser@*":
   version "1.17.1"
   resolved "https://registry.npmjs.org/@types/body-parser/-/body-parser-1.17.1.tgz#18fcf61768fb5c30ccc508c21d6fd2e8b3bf7897"
@@ -2151,6 +2219,11 @@
   resolved "https://registry.npmjs.org/@types/node/-/node-8.10.54.tgz#1c88eb253ac1210f1a5876953fb70f7cc4928402"
   integrity sha512-kaYyLYf6ICn6/isAyD4K1MyWWd5Q3JgH6bnMN089LUx88+s4W8GvK9Q6JMBVu5vsFFp7pMdSxdKmlBXwH/VFRg==
 
+"@types/node@10.17.13":
+  version "10.17.13"
+  resolved "https://registry.npmjs.org/@types/node/-/node-10.17.13.tgz#ccebcdb990bd6139cd16e84c39dc2fb1023ca90c"
+  integrity sha512-pMCcqU2zT4TjqYFrWtYHKal7Sl30Ims6ulZ4UFXxI4xbtQqK/qqKwkDoBFCfooRqqmRu9vY3xaJRwxSh673aYg==
+
 "@types/node@8.10.59":
   version "8.10.59"
   resolved "https://registry.npmjs.org/@types/node/-/node-8.10.59.tgz#9e34261f30183f9777017a13d185dfac6b899e04"
@@ -2792,7 +2865,7 @@ arg@^4.1.0:
   resolved "https://registry.npmjs.org/arg/-/arg-4.1.1.tgz#485f8e7c390ce4c5f78257dbea80d4be11feda4c"
   integrity sha512-SlmP3fEA88MBv0PypnXZ8ZfJhwmDeIE3SP71j37AiXQBXYosPV0x6uISAaHYSlSVhmHOVkomen0tbGk6Anlebw==
 
-argparse@^1.0.7:
+argparse@^1.0.7, argparse@~1.0.9:
   version "1.0.10"
   resolved "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz#bcd6791ea5ae09725e17e5ad988134cd40b3d911"
   integrity sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==
@@ -4336,6 +4409,11 @@ colors@^1.1.0, colors@^1.1.2, colors@^1.3.3:
   resolved "https://registry.npmjs.org/colors/-/colors-1.4.0.tgz#c50491479d4c1bdaed2c9ced32cf7c7dc2360f78"
   integrity sha512-a+UqTh4kgZg/SlGvfbzDHpgRu7AAQOmmqRHJnxhRZICKFUT91brVhNNt58CMWU9PsBbv3PDCZUHbVxuDiH2mtA==
 
+colors@~1.2.1:
+  version "1.2.5"
+  resolved "https://registry.npmjs.org/colors/-/colors-1.2.5.tgz#89c7ad9a374bc030df8013241f68136ed8835afc"
+  integrity sha512-erNRLao/Y3Fv54qUa0LBB+//Uf3YwMUmdJinN20yMXm9zdKKqH9wt7R9IIVZ+K7ShzfpLV/Zg8+VyrBJYB4lpg==
+
 colour@~0.7.1:
   version "0.7.1"
   resolved "https://registry.npmjs.org/colour/-/colour-0.7.1.tgz#9cb169917ec5d12c0736d3e8685746df1cadf778"
@@ -4371,7 +4449,7 @@ commander@2.20.0:
   resolved "https://registry.npmjs.org/commander/-/commander-2.20.0.tgz#d58bb2b5c1ee8f87b0d340027e9e94e222c5a422"
   integrity sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==
 
-commander@^2.12.1, commander@^2.20.0:
+commander@^2.12.1, commander@^2.20.0, commander@^2.7.1:
   version "2.20.3"
   resolved "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
   integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
@@ -6696,7 +6774,7 @@ fs-extra@^6.0.1:
     jsonfile "^4.0.0"
     universalify "^0.1.0"
 
-fs-extra@^7.0.1:
+fs-extra@^7.0.1, fs-extra@~7.0.1:
   version "7.0.1"
   resolved "https://registry.npmjs.org/fs-extra/-/fs-extra-7.0.1.tgz#4f189c44aa123b895f722804f55ea23eadc348e9"
   integrity sha512-YJDaCJZEnBmcbw13fvdAM9AwNOJwOzrE4pqMqBq5nFiEqXUqHwlK4B+3pUw6JNvfSPtX05xFHtYy/1ni01eGCw==
@@ -8828,7 +8906,7 @@ jest-worker@^24.0.0, jest-worker@^24.9.0:
     merge-stream "^2.0.0"
     supports-color "^6.1.0"
 
-jju@^1.1.0:
+jju@^1.1.0, jju@~1.4.0:
   version "1.4.0"
   resolved "https://registry.npmjs.org/jju/-/jju-1.4.0.tgz#a3abe2718af241a2b2904f84a625970f389ae32a"
   integrity sha1-o6vicYryQaKykE+EpiWXDzia4yo=
@@ -8857,7 +8935,7 @@ js-tokens@^3.0.2:
   resolved "https://registry.npmjs.org/js-tokens/-/js-tokens-3.0.2.tgz#9866df395102130e38f7f996bceb65443209c25b"
   integrity sha1-mGbfOVECEw449/mWvOtlRDIJwls=
 
-js-yaml@3.13.1, js-yaml@^3.13.1:
+js-yaml@3.13.1, js-yaml@^3.13.1, js-yaml@~3.13.1:
   version "3.13.1"
   resolved "https://registry.npmjs.org/js-yaml/-/js-yaml-3.13.1.tgz#aff151b30bfdfa8e49e05da22e7415e9dfa37847"
   integrity sha512-YfbcO7jXDdyj0DGxYVSlSeQNHbD7XPWvrVWeVUujrQEoZzWJIRrCPoyk6kL6IAjAG2IolMK4T0hNUe0HOUs5Jw==
@@ -9573,7 +9651,7 @@ lodash.flattendeep@^4.4.0:
   resolved "https://registry.npmjs.org/lodash.flattendeep/-/lodash.flattendeep-4.4.0.tgz#fb030917f86a3134e5bc9bec0d69e0013ddfedb2"
   integrity sha1-+wMJF/hqMTTlvJvsDWngAT3f7bI=
 
-lodash.get@^4.4.2:
+lodash.get@^4.0.0, lodash.get@^4.4.2:
   version "4.4.2"
   resolved "https://registry.npmjs.org/lodash.get/-/lodash.get-4.4.2.tgz#2d177f652fa31e939b4438d5341499dfa3825e99"
   integrity sha1-LRd/ZS+jHpObRDjVNBSZ36OCXpk=
@@ -9603,6 +9681,11 @@ lodash.isboolean@^3.0.3:
   resolved "https://registry.npmjs.org/lodash.isboolean/-/lodash.isboolean-3.0.3.tgz#6c2e171db2a257cd96802fd43b01b20d5f5870f6"
   integrity sha1-bC4XHbKiV82WgC/UOwGyDV9YcPY=
 
+lodash.isequal@^4.0.0:
+  version "4.5.0"
+  resolved "https://registry.npmjs.org/lodash.isequal/-/lodash.isequal-4.5.0.tgz#415c4478f2bcc30120c22ce10ed3226f7d3e18e0"
+  integrity sha1-QVxEePK8wwEgwizhDtMib30+GOA=
+
 lodash.isinteger@^4.0.4:
   version "4.0.4"
   resolved "https://registry.npmjs.org/lodash.isinteger/-/lodash.isinteger-4.0.4.tgz#619c0af3d03f8b04c31f5882840b77b11cd68343"
@@ -9716,7 +9799,7 @@ lodash.values@^2.4.1:
   dependencies:
     lodash.keys "~2.4.1"
 
-lodash@4.17.15, lodash@^4.0.0, lodash@^4.16.6, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.12, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.2.1:
+lodash@4.17.15, lodash@^4.0.0, lodash@^4.16.6, lodash@^4.17.10, lodash@^4.17.11, lodash@^4.17.12, lodash@^4.17.13, lodash@^4.17.14, lodash@^4.17.15, lodash@^4.17.4, lodash@^4.17.5, lodash@^4.2.1, lodash@~4.17.15:
   version "4.17.15"
   resolved "https://registry.npmjs.org/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
   integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
@@ -11465,7 +11548,7 @@ path-parse@1.0.5:
   resolved "https://registry.npmjs.org/path-parse/-/path-parse-1.0.5.tgz#3c1adf871ea9cd6c9431b6ea2bd74a0ff055c4c1"
   integrity sha1-PBrfhx6pzWyUMbbqK9dKD/BVxME=
 
-path-parse@^1.0.6:
+path-parse@^1.0.5, path-parse@^1.0.6:
   version "1.0.6"
   resolved "https://registry.npmjs.org/path-parse/-/path-parse-1.0.6.tgz#d62dbb5679405d72c4737ec58600e9ddcf06d24c"
   integrity sha512-GSmOT2EbHrINBf9SR7CDELwlJ8AENk3Qn7OikK4nFYAu3Ote2+JYNVvkpAEQm3/TLNEJFD/xZJjzyxg3KBWOzw==
@@ -12504,6 +12587,13 @@ resolve@1.15.1:
   dependencies:
     path-parse "^1.0.6"
 
+resolve@1.8.1:
+  version "1.8.1"
+  resolved "https://registry.npmjs.org/resolve/-/resolve-1.8.1.tgz#82f1ec19a423ac1fbd080b0bab06ba36e84a7a26"
+  integrity sha512-AicPrAC7Qu1JxPCZ9ZgCZlY35QgFnNqc+0LtbRNxnVw4TXvjQ72wnuL9JQcEBgXkI9JM8MsT9kaQoHcpCRJOYA==
+  dependencies:
+    path-parse "^1.0.5"
+
 resolve@^1.1.4, resolve@^1.1.6, resolve@^1.1.7, resolve@^1.10.0, resolve@^1.11.0, resolve@^1.11.1, resolve@^1.3.2, resolve@^1.3.3, resolve@^1.4.0, resolve@^1.5.0:
   version "1.12.0"
   resolved "https://registry.npmjs.org/resolve/-/resolve-1.12.0.tgz#3fc644a35c84a48554609ff26ec52b66fa577df6"
@@ -14120,6 +14210,11 @@ timers-ext@^0.1.5:
     es5-ext "~0.10.46"
     next-tick "1"
 
+timsort@~0.3.0:
+  version "0.3.0"
+  resolved "https://registry.npmjs.org/timsort/-/timsort-0.3.0.tgz#405411a8e7e6339fe64db9a234de11dc31e02bd4"
+  integrity sha1-QFQRqOfmM5/mTbmiNN4R3DHgK9Q=
+
 tiny-queue@^0.2.1:
   version "0.2.1"
   resolved "https://registry.npmjs.org/tiny-queue/-/tiny-queue-0.2.1.tgz#25a67f2c6e253b2ca941977b5ef7442ef97a6046"
@@ -14461,7 +14556,7 @@ typedoc@0.16.11:
     typedoc-default-themes "^0.7.2"
     typescript "3.7.x"
 
-typescript@3.7.x:
+typescript@3.7.x, typescript@~3.7.2:
   version "3.7.5"
   resolved "https://registry.npmjs.org/typescript/-/typescript-3.7.5.tgz#0692e21f65fd4108b9330238aac11dd2e177a1ae"
   integrity sha512-/P5lkRXkWHNAbcJIiHPfRoKqyd7bsyCma1hZNUGfn20qm64T6ZBlrzprymeu918H+mB/0rIg2gGK/BXkhhYgBw==
@@ -14886,6 +14981,11 @@ validator@^10.11.0:
   resolved "https://registry.npmjs.org/validator/-/validator-10.11.0.tgz#003108ea6e9a9874d31ccc9e5006856ccd76b228"
   integrity sha512-X/p3UZerAIsbBfN/IwahhYaBbY68EN/UQBWHtsbXGT5bfrH/p4NQzUCG1kF/rtKaNpnJ7jAu6NGTdSNtyNIXMw==
 
+validator@^8.0.0:
+  version "8.2.0"
+  resolved "https://registry.npmjs.org/validator/-/validator-8.2.0.tgz#3c1237290e37092355344fef78c231249dab77b9"
+  integrity sha512-Yw5wW34fSv5spzTXNkokD6S6/Oq92d8q/t14TqsS3fAiA1RYnxSFSIZ+CY3n6PGGRCq5HhJTSepQvFUS2QUDxA==
+
 value-or-function@^3.0.0:
   version "3.0.0"
   resolved "https://registry.npmjs.org/value-or-function/-/value-or-function-3.0.0.tgz#1c243a50b595c1be54a754bfece8563b9ff8d813"
@@ -15679,6 +15779,17 @@ yn@3.1.1:
   resolved "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz#1e87401a09d767c1d5eab26a6e4c185182d2eb50"
   integrity sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==
 
+z-schema@~3.18.3:
+  version "3.18.4"
+  resolved "https://registry.npmjs.org/z-schema/-/z-schema-3.18.4.tgz#ea8132b279533ee60be2485a02f7e3e42541a9a2"
+  integrity sha512-DUOKC/IhbkdLKKiV89gw9DUauTV8U/8yJl1sjf6MtDmzevLKOF2duNJ495S3MFVjqZarr+qNGCPbkg4mu4PpLw==
+  dependencies:
+    lodash.get "^4.0.0"
+    lodash.isequal "^4.0.0"
+    validator "^8.0.0"
+  optionalDependencies:
+    commander "^2.7.1"
+
 zip-stream@^2.1.2:
   version "2.1.2"
   resolved "https://registry.npmjs.org/zip-stream/-/zip-stream-2.1.2.tgz#841efd23214b602ff49c497cba1a85d8b5fbc39c"