diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 96d528cb5214c..043bf03705c67 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -119,6 +119,10 @@ The main entry point for the Node module Puppeteer is `cjs-entry.js`. This impor
 
 We also maintain `test/tsconfig.test.json`. This is **only used to compile the unit test `*.spec.ts` files**. When the tests are run, we first compile Puppeteer as normal before running the unit tests **against the compiled output**. Doing this lets the test run against the compiled code we ship to users so it gives us more confidence in our compiled output being correct.
 
+### Root `tsconfig.json`
+
+The root `tsconfig.json` exists for the API Extractor; it has to find a `tsconfig.json` in the project's root directory. It is _not_ used for anything else.
+
 
 ## API guidelines
 
diff --git a/api-extractor.json b/api-extractor.json
index b388a148a4906..3e7b9e66f625e 100644
--- a/api-extractor.json
+++ b/api-extractor.json
@@ -1,6 +1,6 @@
 {
   "$schema": "https://developer.microsoft.com/json-schemas/api-extractor/v7/api-extractor.schema.json",
-  "mainEntryPointFilePath": "<projectFolder>/lib/cjs/api-docs-entry.d.ts",
+  "mainEntryPointFilePath": "<projectFolder>/lib/cjs/puppeteer/api-docs-entry.d.ts",
   "bundledPackages": [ "devtools-protocol" ],
 
   "apiReport": {
diff --git a/new-docs/puppeteer.md b/new-docs/puppeteer.md
index 5e64b8e168171..ee5c2de12a696 100644
--- a/new-docs/puppeteer.md
+++ b/new-docs/puppeteer.md
@@ -85,7 +85,7 @@
 
 |  Namespace | Description |
 |  --- | --- |
-|  [Protocol](./puppeteer.protocol.md) | \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* Auto-generated by protocol-dts-generator.ts, do not edit manually. \* \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* |
+|  [Protocol](./puppeteer.protocol.md) | The Chrome DevTools protocol. |
 
 ## Variables
 
diff --git a/new-docs/puppeteer.protocol.css.cssmedia.md b/new-docs/puppeteer.protocol.css.cssmedia.md
index 3c79ef5fb021d..3efb162b165dc 100644
--- a/new-docs/puppeteer.protocol.css.cssmedia.md
+++ b/new-docs/puppeteer.protocol.css.cssmedia.md
@@ -18,7 +18,7 @@ export interface CSSMedia
 |  --- | --- | --- |
 |  [mediaList](./puppeteer.protocol.css.cssmedia.medialist.md) | [MediaQuery](./puppeteer.protocol.css.mediaquery.md)<!-- -->\[\] | Array of media queries. |
 |  [range](./puppeteer.protocol.css.cssmedia.range.md) | [SourceRange](./puppeteer.protocol.css.sourcerange.md) | The associated rule (<!-- -->@<!-- -->media or @<!-- -->import) header range in the enclosing stylesheet (if available). |
-|  [source](./puppeteer.protocol.css.cssmedia.source.md) | ('mediaRule' \| 'importRule' \| 'linkedSheet' \| 'inlineSheet') | Source of the media query: "mediaRule" if specified by a  rule, "importRule" if specified by an  rule, "linkedSheet" if specified by a "media" attribute in a linked stylesheet's LINK tag, "inlineSheet" if specified by a "media" attribute in an inline stylesheet's STYLE tag. |
+|  [source](./puppeteer.protocol.css.cssmedia.source.md) | ('mediaRule' \| 'importRule' \| 'linkedSheet' \| 'inlineSheet') | Source of the media query: "mediaRule" if specified by a <code>@media</code> rule, "importRule" if specified by an <code>@import</code> rule, "linkedSheet" if specified by a "media" attribute in a linked stylesheet's LINK tag, "inlineSheet" if specified by a "media" attribute in an inline stylesheet's STYLE tag. |
 |  [sourceURL](./puppeteer.protocol.css.cssmedia.sourceurl.md) | string | URL of the document containing the media query description. |
 |  [styleSheetId](./puppeteer.protocol.css.cssmedia.stylesheetid.md) | [StyleSheetId](./puppeteer.protocol.css.stylesheetid.md) | Identifier of the stylesheet containing this object (if exists). |
 |  [text](./puppeteer.protocol.css.cssmedia.text.md) | string | Media query text. |
diff --git a/new-docs/puppeteer.protocol.css.cssmedia.source.md b/new-docs/puppeteer.protocol.css.cssmedia.source.md
index ea482440c3f65..158fff3386b16 100644
--- a/new-docs/puppeteer.protocol.css.cssmedia.source.md
+++ b/new-docs/puppeteer.protocol.css.cssmedia.source.md
@@ -4,7 +4,7 @@
 
 ## Protocol.CSS.CSSMedia.source property
 
-Source of the media query: "mediaRule" if specified by a  rule, "importRule" if specified by an  rule, "linkedSheet" if specified by a "media" attribute in a linked stylesheet's LINK tag, "inlineSheet" if specified by a "media" attribute in an inline stylesheet's STYLE tag.
+Source of the media query: "mediaRule" if specified by a `@media` rule, "importRule" if specified by an `@import` rule, "linkedSheet" if specified by a "media" attribute in a linked stylesheet's LINK tag, "inlineSheet" if specified by a "media" attribute in an inline stylesheet's STYLE tag.
 
 <b>Signature:</b>
 
diff --git a/new-docs/puppeteer.protocol.md b/new-docs/puppeteer.protocol.md
index 587ee69698bd0..ed932d4facd27 100644
--- a/new-docs/puppeteer.protocol.md
+++ b/new-docs/puppeteer.protocol.md
@@ -4,7 +4,7 @@
 
 ## Protocol namespace
 
-\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* Auto-generated by protocol-dts-generator.ts, do not edit manually. \* \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*
+The Chrome DevTools protocol.
 
 <b>Signature:</b>
 
diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 0000000000000..69717ed6d9b2e
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,11 @@
+/**
+ * This configuration only exists for the API Extractor tool. See the details in
+ * CONTRIBUTING.md that describes our TypeScript setup.
+*/
+{
+  "extends": "./tsconfig.base.json",
+  "compilerOptions": {
+    "noEmit": true
+  },
+  "include": ["src"]
+}