Merge pull request #52 from woocommerce/24-12/update/validation-readme-license

Add readme.txt and License header info

Author: singerb

docs/managed-tests/validation.md

@@ -4,13 +4,17 @@ Validation tests ensure that your extension’s metadata and WooCommerce feature
 
 ## What validation tests check
 
+- **readme.txt file:**
+  The test checks for the presence of a readme.txt file, which all plugins and themes are [required to provide](https://woocommerce.com/document/create-a-plugin/#section-8).
+
 - **Plugin headers:**  
   The test checks for the presence of important headers in your plugin or theme’s main file and `readme.txt`. The following headers should be present and accurate:
     - `Requires PHP`
     - `Requires at least`
     - `Tested up to`
     - `WC requires at least`
     - `WC tested up to`
+    - `License`
 
   Missing or incorrect versions will trigger a warning. Additionally, certain headers should **not** be included:
     - `Woo` — As noted in the [WooCommerce plugin creation documentation](https://woocommerce.com/document/create-a-plugin/#section-14), this will be automatically added during deployment. Including it manually may cause issues and will be warned against.
@@ -30,15 +34,18 @@ Validation tests ensure that your extension’s metadata and WooCommerce feature
 ## Possible outcomes
 
 - **Success:**  
-  All required metadata is present and correct, and no invalid headers or incompatible feature declarations were found.
+  A readme.txt file is present, all required metadata is present and correct, and no invalid headers or incompatible feature declarations were found.
 
 - **Warning:**  
-  Some headers may be missing or incorrect, or you declared incompatibility with WooCommerce features that you should ideally support. If you’re a theme developer, outdated templates are flagged as warnings and should be updated.
+  A readme.txt file may be missing or misnamed, some headers may be missing or incorrect, or you declared incompatibility with WooCommerce features that you should ideally support. If you’re a theme developer, outdated templates are flagged as warnings and should be updated.
 
 ## Interpreting results
 
 If you receive warnings:
 
+- **Check your readme.txt file:**  
+  Ensure a correctly named readme.txt file is provided in the root directory of your plugin or theme.
+
 - **Review headers and declarations:**  
   Ensure all required headers are accurate and that you’re not declaring incompatibility with features you could support.