Book Index Coverage Agent

Book indexes often miss key concepts or point to the wrong pages, especially after late layout changes. This agent runs when pages are set. It identifies candidate index entries from substantive discussion of a concept, not from how often a word appears. For each entry, it checks the page references point to where the concept is actually discussed, not a passing mention. After repagination, it updates every affected reference and checks again. It drafts the index following the publisher's style, and the production editor approves. Edge case: a concept discussed under two different names gets one main entry and a cross-reference, not two separate entries.