Phasr

Phasr is a desktop application designed for developers who want to use multiple AI coding agents simultaneously. It creates an isolated environment for each agent using Git worktrees, allowing tasks like writing an auth middleware, adding rate limiting, and generating API documentation to happen at the same time without conflicts. You can see the progress of each agent in real-time and review all the code changes before they are merged into your main codebase.

The tool is agent-agnostic, meaning it works with any command-line AI coding tool you already use, such as Claude Code, Codex CLI, Gemini CLI, Aider, or Cursor. Its main strength is its focus on isolation and control. Each agent operates in its own Git worktree, so their changes don't interfere with each other. You get a clear, file-by-file diff view of what each agent has modified, and you must manually approve or reject the changes before they are merged. It also integrates with your favorite IDE, providing one-click links to open the agent's work in VS Code, Cursor, or JetBrains for further editing.

Phasr is ideal for engineering teams that are scaling their use of AI for coding. It helps senior developers or tech leads delegate multiple coding tasks to different AI agents while maintaining a robust review process. Use cases include parallelizing feature development, refactoring different parts of a codebase, or generating boilerplate code for various components, all while ensuring a human remains in control of the final merge.