The comparison matters because personal AI agents are starting to operate across messages, browsers, documents, and publishing systems. A replay tool may show the pixels of a session, but it usually does not preserve the owner instruction, approval window, source list, reasoning note, changed file, and failed-link report in one place.
For a text-message AI assistant, evidence room software can attach the approval message to the action. For a browser agent, it can store screenshots and validation output. For an agent that publishes a page, it can retain the release receipt, backlink targets, and deployment status.