Render any document the user needs to review (design docs, plans, story bibles, proposals, reports) as a self-contained HTML page with Google-Docs-style commenting — highlight text, attach notes, export feedback. Use whenever producing or updating a document whose primary purpose is for the user to READ AND REACT TO, whenever the user asks for "a review doc", or when they hand back a *.feedback.md file. The user has standing instructions that all review documents get this treatment.
