Zed launches Delta, a multiplayer coding environment for AI agents
The San Francisco-based developer tool company positions Delta as a dedicated space for human-AI collaboration, leveraging WebAssembly for cloud-based access and supporting third-party agents like Claude Code.
Zed has officially introduced Delta, a new multiplayer coding environment designed to facilitate collaboration between human developers and artificial intelligence agents. The platform, which is currently in private beta, utilises a proprietary real-time database called DeltaDB to synchronise code and conversation threads, ensuring that context remains intact as software evolves.
DeltaDB replicates the conversation and worktree in real time, linking comments to specific code lines and commits within a standard git repository. This architecture allows developers and agents to work together with full historical context, enabling users to comment on any line of code regardless of when it was written or modified. The system ensures that teammates who do not use Delta see a normal git repository, maintaining compatibility with existing workflows.
The application is built on Rust and compiled to WebAssembly, allowing for a cloud-based collaboration experience via a web browser without requiring installation. Zed emphasised that the web version is not a simplified JavaScript build but the same Rust application rendered through WebGL, ensuring that users receive the same performance and interface as the desktop version.
Delta supports third-party agent harnesses, starting with Claude Code, allowing sessions to sync live into a Delta thread. This integration enables users to continue working in their preferred terminal while the conversation and code evolve in the platform. The design aims to present full diffs and complete transcripts, avoiding the truncation or summarisation common in other agent tools.
Zed described Delta as the second phase of its long-term strategy to create the optimal environment for writing and discussing code. The company noted that DeltaDB was developed independently to avoid disrupting the workflows of its existing user base, with plans to eventually integrate the database technology into the main Zed application.
The first round of invitations for the private beta has been distributed, with additional invites planned for the coming weeks. Zed remains available for download on macOS, Windows, and Linux, while Delta offers a browser-based entry point for collaborative sessions.
