The Workflow of the Future With Zed

Syntax hosts Wes Bos and Scott Tolinski interview Zed co-founder Nathan Sobo about Delta, a beta-stage collaborative agent editor backed by DeltaDB. The reusable contribution is a fine-grained version and provenance layer that binds code, agent conversation, and human annotations before a commit exists.

This is a founder and product interview rather than a workflow demo or comparative study. It does not measure productivity, review accuracy, synchronization reliability, or team outcomes, and some repository-wide annotation behavior was still planned.

Key Points Covered

• DeltaDB moves provenance below commits: Sobo describes assigning every evolving software version an address so comments and conversations can attach to work in progress instead of only to committed snapshots (00:22:44–00:25:29(opens in a new tab)).
• The agent thread and worktree travel together: Delta continuously captures prompts and other activity, lets a teammate join the same thread, synchronizes editable worktree replicas, and attributes generated lines to an agent or model (00:26:34–00:29:06(opens in a new tab)). These are first-party descriptions, not independently tested guarantees.
• Review can happen in the producing context: Participants can share the agent, its context window, and code while work is underway, then still use pull requests and CI as downstream gates (00:29:06–00:32:08(opens in a new tab)). The interview does not show that this improves defect detection.
• Conflict-free synchronization does not remove semantic conflict: Sobo says DeltaDB models the file tree with copy-on-write persistent structures, mirrors it to disk for tools, and synchronizes replicas without a critical central coordinator; he explicitly notes that concurrent changes can still converge into a semantically conflicting result (00:36:56–00:41:28(opens in a new tab)).
• Cross-version annotations were still roadmap: The team was working on a repository-wide index intended to retrieve a code annotation wherever the marked range remains visible across committed and uncommitted states (00:33:10–00:34:10(opens in a new tab)).
• Local and hosted execution can share one thread: Sobo describes desktop participants running locally while browser participants use hosted runners, with work synchronized between them (00:43:23–00:44:15(opens in a new tab)).
• Agent output becomes an annotatable document: Instead of confining output to chat bubbles, Delta presents commands, edits, and rich text as a cursor-navigable document where a person can type feedback inline (00:49:01–00:50:55(opens in a new tab)).

Full video: https://www.youtube.com/watch?v=GsLyhrxaMIo(opens in a new tab)