docs: recommend WordPress voice training

Author: dknauss

CHANGELOG.md

@@ -9,6 +9,7 @@ All notable changes to the WordPress Security Hardening Guide.
 - Added a repo-local generated-artifact smoke validator and a dedicated `Validate Artifacts` workflow for PDF, EPUB, and DOCX outputs.
 - Added a Playwright-based PDF visual smoke test and dedicated workflow with committed baselines for critical page regions.
 - Added a cross-format parity check so a small set of canonical phrases must remain present in the Markdown source and generated PDF, EPUB, and DOCX outputs.
+- Added Learn WordPress's [Writing in the WordPress voice](https://learn.wordpress.org/course/writing-in-the-wordpress-voice/) as the recommended WordPress-specific voice and accessibility reference for user-facing hardening guidance and communications.
 
 ### Changed
 - Corrected current-version framing to reflect the public WordPress 7.0 release and remove stale pre-release scheduling language.

README.md

@@ -57,6 +57,7 @@ This guide is one of four complementary documents covering WordPress security fr
 
 - [Hardening WordPress](https://developer.wordpress.org/advanced-administration/security/) — Official WordPress.org Advanced Administration Handbook.
 - [Securing WordPress](https://cio.ubc.ca/information-security/policy-standards-resources/M5/gui-securing-wordpress) — Information Security Guidance from the University of British Columbia's Office of the CIO.
+- [Learn WordPress — Writing in the WordPress voice](https://learn.wordpress.org/course/writing-in-the-wordpress-voice/) — recommended training for contributors who turn hardening guidance into user-facing documentation, advisories, or internal communications.
 
 ---
 
@@ -87,7 +88,7 @@ To get the most out of this repository:
 
 ## AI-Assisted Editorial Process
 
-This document and the three related documents in this series are revised with the assistance of frontier LLMs. Multiple models independently review all four documents for factual errors, outdated guidance, and cross-document misalignments, with the WordPress Advanced Administration Handbook as primary authority. A human editor reviews, approves, or rejects every recommended change before it is applied. For the full methodology, see **[AI-Assisted Documentation Processes](https://github.com/dknauss/ai-assisted-docs)**. The machine-readable editorial agent skills and cross-document consistency rules are in the [skills directory](https://github.com/dknauss/ai-assisted-docs/tree/main/wp-docs-skills).
+This document and the three related documents in this series are revised with the assistance of frontier LLMs. Multiple models independently review all four documents for factual errors, outdated guidance, and cross-document misalignments, using WordPress technical documentation as primary authority for product facts and the Learn WordPress course [Writing in the WordPress voice](https://learn.wordpress.org/course/writing-in-the-wordpress-voice/) as primary authority for WordPress-specific voice and accessibility guidance. A human editor reviews, approves, or rejects every recommended change before it is applied. For the full methodology, see **[AI-Assisted Documentation Processes](https://github.com/dknauss/ai-assisted-docs)**. The machine-readable editorial agent skills and cross-document consistency rules are in the [skills directory](https://github.com/dknauss/ai-assisted-docs/tree/main/wp-docs-skills).
 
 ---