Delta is a brand-new, standalone application from the team behind the Zed editor. It is designed to be a multiplayer environment where developers and AI agents write code together, and where reviewing that code happens in the same place the work was done. The first private beta invites went out today, with more rolling out over the coming weeks.

This is not a Zed plugin or a new panel inside the editor. Delta is its own app, built from scratch around a new idea: the conversation between you and an agent is the actual source of your software, and your tooling should treat it that way.

The gap Git was never designed to fill

Increasingly, the conversation that generates code is becoming the true source of software. That conversation unfolds continuously and must be cross-referenced to the code as it changes. Git, organized around discrete commits, was never designed to support this. Every prompt, every agent decision, every mid-session course correction disappears the moment you commit.

The announcement is directed at the growing fraction of developers whose workflows involve AI coding agents: tools that generate code through multi-turn conversations that Git's snapshot model permanently discards. Pull requests and review threads exist precisely because the discussion and the code lived in separate places. Delta's bet is that putting them in the same place makes the ceremony disappear.

DeltaDB: the engine underneath

Delta is built on DeltaDB, a new kind of version control the Zed team has been building for over a year. DeltaDB breaks your work into a stream of fine-grained deltas. Where Git captures a snapshot at each commit, DeltaDB captures every operation in between and gives each one a stable identity. Because every delta can be addressed on its own, you can point to the code at any moment in its evolution, even as it keeps changing.

DeltaDB is built on operation-based conflict-free replicated data types, or CRDTs, a class of distributed data structures originally designed for collaborative text editing and since deployed in distributed databases including Redis, Riak, and Azure Cosmos DB. CRDTs are the same technology that makes Google Docs feel seamless: multiple people editing the same document simultaneously, with changes that always converge without conflicts.