Multi-source investigation (wiki, email, web, video/transcripts when useful), often via parallel agents pulling different sources at once, that lands as durable wiki page(s)—not a one-line chat answer. Examples: “research competitors to X and add a page under strategy/”; “pull together everything we know about Project Y with citations”; “investigate Z and write a hub page plus evidence subpages”. If the user only needs a quick lookup or “where did I put this,” use normal chat. For editing an existing page without deep investigation, use /wiki.