If design and review live only in ephemeral agent threads, you have an audit…

If design and review live only in ephemeral agent threads, you have an audit and handoff problem: the decision belongs to the artifact, not the chat. Tools like Delta show how a thread can preserve edits and context, but the practical portability you need is Git-native issues or patch-first reviews that keep titles, diffs, and rationale as repository-first objects. Make the repository the durable contract: require a file, patch branch, or issue that records the why and the diff so any IDE, vendor, or agent can pick up the work later.