Research report — verified 2026-09-09
The clearest category name is artifact-grounded review layer: software that keeps a discussion, work request, and its evidence attached to the particular content being reviewed, while presenting the same underlying record visually to a human and structurally to an agent. “Annotation system” is too narrow because it omits assignment and action; “agent task manager” is too broad and loses the anchor; “collaborative editor” implies owning the artifact; and “code review” excludes the document, slide, spreadsheet, PDF, and image cases.
Finding: no complete product was verified. Existing systems cluster into four strong but incomplete groups. Google Workspace, Microsoft Office, Figma, GitHub, Gerrit, and Frame.io provide excellent native human review inside their own artifact boundaries but are proprietary or remote, unevenly expose anchors and thread opera