I send a message on on the prospects IRC channel when I started making changes, to make sure that everyone was okay with them, and I've been trying to avoid anything related to any quests or spoilers.
If two of the three types of Clackers are currently in the Wiki, and the third is mentioned in an in-game book that doesn't require a quest to get to, I assume that shouldn't be considered spoiler material. A lot of the changes I made were cosmetic. There were typos and inconsistencies in how things were laid out and spelled in certain areas. The Creatures page inconsistently used a template for individual creatures, some of which had their own pages, and others didn't. Know they all have their own page, they all use the same template, and the main Creatures page pulls in the individual pages. Update the Clacker page, and it automatically updates what is displayed on the main Creatures page.
And some of the stuff I added, like lexicon terms, and the addition of Ochtarchs and Vigesimi pages, are stuff taken from the Player's Guide.
If someone decides that something I posted crosses a spoiler-boundary, then it will be deleted. But I have been trying to stay within the realm of general information in line with the Player's Guide.