Zed introduces Delta, a separate application built on a database that replicates the agent conversation and the worktree together

Sources: primary, discussion
Summary: Zed announced Delta, a new application separate from the editor, backed by a database that replicates both the agent conversation and the worktree. Delta syncs sessions from third-party agent harnesses, starting with Claude Code. It is in private beta with no general availability date.
Why it matters: Zed is putting its multiplayer agent work in a new product rather than the editor, which moves the review surface for agent work off the commit and onto the thread.
Follow-up: Record general availability and whether harnesses beyond Claude Code are added.