A manual documents one aspect of Rails with enough detail and readability that it can be used to help answer someone's question.  See [[The 'Middle' Documentation Problem]].

Manual pages should have the word "Manual" in their title (e.g. at the end), and have the category "Manual".

h2. List of Manuals

DevTestProductionManual

h2. Etc.

p{border: solid 1px silver; padding: 5px;}. The discussion has been moved to ManualDiscussion.