Tempest

Tempest is an open source desktop application for running several AI coding agents at the same time on one codebase. It supports command line agents including Claude Code, Codex, Gemini CLI, OpenCode, Cline, Goose, Amp and others, and presents them in a single window so developers do not have to juggle terminals. Isolation is the central idea. Each session gets its own git worktree and branch, so agents never overwrite each other's files, and the site says a sandbox layer wraps each process using Job Objects on Windows, sandbox exec on macOS and bubblewrap on Linux. A local code knowledge graph is built once and shared across sessions, which the vendor says reduces context use by up to 86 percent and tool calls by up to 92 percent. Other features include a canvas for dropping chats, files and notes as context for an agent, a live diff viewer with staging, commit, push and pull request creation, and a mobile app that streams the same sessions so work started on the desktop can be continued from a phone. The app is built with Tauri, with a Rust backend and React frontend, ships native builds for Windows, macOS and Linux, and runs on the user's machine without sending code elsewhere. It suits individual developers and engineering teams doing agent driven development at scale. It is listed as free and open source, and no paid plans are published.