wigolo-diff

Compare two versions of a page and see exactly what changed — a live URL against its cached copy, two URLs, or two markdown blobs. Section-level hunks, word — or line-level granularity, or a summary of counts. Use when the user says "what changed", "diff these", "compare this page to last time", "show me the changes", "did this doc update", or wants a changelog between two versions of the same content.