hook_build_page() for CSS/JS

Drupal 7 protip: Adding CSS or JS to every page? Use hook_page_build() and not hook_init().

— Dave Reid (@davereid) January 24, 2013

@BarisW hook_init() runs even on AJAX requests, private file requests, etc. hook_page_build() runs when we're only delivering HTML.

— Dave Reid (@davereid) January 24, 2013