diff --git a/packages/docs/site/docs/_fragments/_api_list.mdx b/packages/docs/site/docs/_fragments/_api_list.mdx
deleted file mode 100644
index e6d2b3c829d..00000000000
--- a/packages/docs/site/docs/_fragments/_api_list.mdx
+++ /dev/null
@@ -1,3 +0,0 @@
-- [Query API](/developers/apis/query-api) enable basic operations using only query parameters
-- [Blueprints API](/blueprints) give you a great degree of control with a simple JSON file
-- [JavaScript API](/developers/apis/javascript-api) give you full control via a JavaScript client from an npm package
diff --git a/packages/docs/site/docs/_fragments/_js_api_short_example.mdx b/packages/docs/site/docs/_fragments/_js_api_short_example.mdx
deleted file mode 100644
index 8fee428c270..00000000000
--- a/packages/docs/site/docs/_fragments/_js_api_short_example.mdx
+++ /dev/null
@@ -1,17 +0,0 @@
-```html
-
-
-```
diff --git a/packages/docs/site/docs/_fragments/_playground_wp_net_may_stop_working.md b/packages/docs/site/docs/_fragments/_playground_wp_net_may_stop_working.md
deleted file mode 100644
index da64bfa03de..00000000000
--- a/packages/docs/site/docs/_fragments/_playground_wp_net_may_stop_working.md
+++ /dev/null
@@ -1,5 +0,0 @@
-:::caution Careful with the demo site
-
-The site at https://playground.wordpress.net is there to support the community, but there are no guarantees it will continue to work if the traffic grows significantly.
-
-If you need certain availability, you should [host your own WordPress Playground](/developers/architecture/host-your-own-playground).
diff --git a/packages/docs/site/docs/_fragments/_this_is_query_api.md b/packages/docs/site/docs/_fragments/_this_is_query_api.md
deleted file mode 100644
index f20cae561a3..00000000000
--- a/packages/docs/site/docs/_fragments/_this_is_query_api.md
+++ /dev/null
@@ -1 +0,0 @@
-This is called [Query API](/developers/apis/query-api/) and you can learn more about it [here](/developers/apis/query-api/).
diff --git a/packages/docs/site/docs/_fragments/_work_in_progress.md b/packages/docs/site/docs/_fragments/_work_in_progress.md
deleted file mode 100644
index 6521c421c6c..00000000000
--- a/packages/docs/site/docs/_fragments/_work_in_progress.md
+++ /dev/null
@@ -1,4 +0,0 @@
-:::danger Work in Progress
-
-WordPress Playground is under active development and the features described in this document
-may break or change without a warning.
diff --git a/packages/docs/site/docs/developers/03-build-an-app/01-index.md b/packages/docs/site/docs/developers/03-build-an-app/01-index.md
index 654f1608de5..8bbafe94625 100644
--- a/packages/docs/site/docs/developers/03-build-an-app/01-index.md
+++ b/packages/docs/site/docs/developers/03-build-an-app/01-index.md
@@ -22,26 +22,28 @@ Playground can be embedded on your website using the HTML `