tl;dr: Zed is building DeltaDB, a new version control system that captures fine-grained deltas of every operation rather than Git-style commit snapshots, pairing code changes with the conversations (human or agent) that produced them. Each delta has a stable identity, so references survive code movement, enabling collaborators and agents to jump between code and its originating discussion without commits, PRs, or review threads. A beta is launching in a few weeks.