Zed Launches Delta App for AI Agent Collaboration

The team behind the Zed code editor has launched Delta, a standalone multiplayer application currently in private beta. Designed specifically for environments where AI agents write the majority of the code, Delta is powered by DeltaDB, a conflict-free replicated data type (CRDT) version control layer that logs every single edit made between commits. The platform integrates directly with Claude Code terminal sessions, syncing them live into Delta threads. Because Delta.dev runs the complete Rust-based application via WebAssembly, developers can access the entire experience directly in a web browser without needing a local installation.

Alongside the Delta announcement, Zed shipped version 1.15 of its core editor. The update introduces a highly anticipated git.diff_base setting, which allows developers to diff an entire feature branch against the default branch rather than just showing uncommitted changes. This default branch mode, built on an initial implementation by community contributor samuelcolvin, displays the full scope of branch modifications directly in the editor gutter. The release also brings quality-of-life updates for web developers, including Emmet completions in return and arrow-function bodies, and linked editing for custom elements in JSX and TSX.

These updates fundamentally change how developers interact with both AI tools and version control. By anchoring comments directly to live code and syncing agent conversations in real time, Delta eliminates the context-switching typically required during pull request reviews. For daily coding, the new git diffing options provide immediate clarity on multi-commit progress. Currently, the standard Zed editor remains free to use with a limit of 2,000 edit predictions per month, while the Pro tier is priced at $10 per month. Pricing for Delta has not yet been announced, though early access sign-ups are open.