Zed Industries has introduced Delta, a collaborative environment for coding with agents and reviewing their work, and begun inviting users to a private beta. The application places conversation at the center while keeping the associated source tree synchronized among participants.
Delta is built on DeltaDB, a system that replicates a discussion and its worktree together in real time. It works alongside an existing Git repository: edits and conversations are captured between commits, while teammates who do not use Delta continue to see a conventional repository. Normal commit and push workflows remain available.
The design addresses a limitation of snapshot-based review. In Delta, a comment can attach to a line of code or any part of an agent conversation and remain connected as the work changes. Reviewers can ask the agent to explain or fix a questionable section within the same thread that contains the original request and decisions, reducing the need to reconstruct intent from a standalone diff.
Threads are private until shared with invited participants. Each collaborator receives a local copy of the code that stays synchronized as work proceeds, even before changes are committed. A teammate can explore the thread, comment in real time or continue a task later with the conversation and current worktree present.
Delta also supports cloud runners, allowing an agent to continue after the initiating laptop closes. Shared browser links open the same Rust application compiled to WebAssembly and rendered with WebGL, rather than a separate JavaScript reimplementation. Third-party agent integration starts with Claude Code, whose terminal session can synchronize into a Delta thread.
The interface treats the conversation as an editable document. Users can navigate it with code-editor keyboard motions and place a response beside a precise line of a plan, transcript, reasoning block or diff. Full transcripts and diffs remain visible instead of being automatically reduced to summaries, according to Zed.
Zed plans eventually to bring DeltaDB into its existing editor, but created Delta as a separate first client so the replicated database and conversation-centered interface could develop together without disrupting Zed's established users. Zed itself will continue to be developed.
The beta launch is limited rather than a general release. Initial invitations went out on the event date, with more planned over subsequent weeks. Delta's promise is persistent shared context across code, review and agent discussion; its performance and fit for production teams will depend on experience beyond the early-access group.
The separation also lets Zed test a conversation-first product without rebuilding the foundations beneath its existing editor. Whether teams prefer a thread as the primary unit of work is one of the beta's central product questions.
