During June 2026, this developer enhanced the pressbooks/pressbooks-aldine repository by implementing extensible contact form hooks to support plugin-based validation and UI injection. The work replaced hardcoded CAPTCHA and Turnstile logic with generic WordPress hooks, allowing external plugins to manage security features such as CAPTCHA integration. The developer refactored tightly coupled flows, removing specific Turnstile functions in favor of a more maintainable, hook-driven architecture. Comprehensive unit tests were added to verify hook behavior and end-to-end plugin extension scenarios, while documentation was updated to reflect these changes. The project utilized PHP, WordPress, and unit testing to ensure robust extensibility.