diff --git a/.pullapprove.yml b/.pullapprove.yml
index eca4f6fe20..dfd8f3183a 100644
--- a/.pullapprove.yml
+++ b/.pullapprove.yml
@@ -843,6 +843,32 @@ groups:
         - jelbourn
 
 
+  # =========================================================
+  #  Tooling: Compiler API shared with Angular CLI
+  #
+  #  Changing this API might break Angular CLI, so we require
+  #  the CLI team to approve changes here.
+  # =========================================================
+  tooling-cli-shared-api:
+    conditions:
+      - *can-be-global-approved
+      - *can-be-global-docs-approved
+      - >
+        contains_any_globs(files, [
+          'packages/compiler-cli/src/tooling.ts'
+        ])
+    reviewers:
+      users:
+        - alan-agius4
+        - clydin
+        - kyliau
+        - IgorMinar
+    reviews:
+      request: -1   # request reviews from everyone
+      required: 2   # require at least 2 approvals
+      reviewed_for: required
+
+
   # =========================================================
   #  Docs: CLI
   # =========================================================
diff --git a/packages/compiler-cli/src/tooling.ts b/packages/compiler-cli/src/tooling.ts
index fb5ce6453d..44a7d50e21 100644
--- a/packages/compiler-cli/src/tooling.ts
+++ b/packages/compiler-cli/src/tooling.ts
@@ -7,11 +7,14 @@
  */
 
 /**
- * @module
- * @description
- * Tooling support helpers.
+ * @fileoverview
+ * This file is used as a private API channel to shared Angular FW APIs with @angular/cli.
+ *
+ * Any changes to this file should be discussed with the Angular CLI team.
  */
 
+
+
 /**
  * Known values for global variables in `@angular/core` that Terser should set using
  * https://github.com/terser-js/terser#conditional-compilation