checkpoint

Author: erikhatcher

docs/20_Intro_to_Atlas_Search/2_aggregation_stages.mdx

@@ -66,6 +66,14 @@ accessible in the $$SEARCH_META context variable.
   </div>
   </details>
 
+  IMPORTANT: Always specify the `index` parameter. Otherwise it uses `default`(?) and if there's no
+             index by that name, you get `[]` not an error. The Playground only has a `default` index.
+             (and you get an error if you use any other name); be explicit.
+
+             "Yes I double checked that the index name matches." (forum user that has been bitten before)
+             - https://www.mongodb.com/community/forums/t/no-documents-retrieved-using-dynamic-false/310123
+
+
 ## Post $search-stages
 
   * Such as $sort, $group, etc any stage that consumes **all** documents from previous stage.

docs/30_Index_configuration/2_basic_types.mdx

@@ -56,3 +56,7 @@ Why doesn't this playground match as expected?
   ```
   </div>
   </details>
+
+IMPORTANT: Type matters. This detail can make or break your pipeline:
+     e.g. https://www.mongodb.com/community/forums/t/no-documents-retrieved-using-dynamic-false/310123/3
+     

docs/40_Analysis/2_language.mdx

@@ -0,0 +1,4 @@
+# Language
+
+你好！Bom dia! Hola!
+