diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 437ed94835..03e9ad6564 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -282,8 +282,13 @@ npm run lint
 ### Project Structure
 
 - `packages/`: Contains the individual sub-packages of the project.
+  - `a2a-server`: A2A server implementation for the Gemini CLI. (Experimental)
   - `cli/`: The command-line interface.
   - `core/`: The core backend logic for the Gemini CLI.
+  - `test-utils` Utilities for creating and cleaning temporary file systems for
+    testing.
+  - `vscode-ide-companion/`: The Gemini CLI Companion extension pairs with
+    Gemini CLI.
 - `docs/`: Contains all project documentation.
 - `scripts/`: Utility scripts for building, testing, and development tasks.