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Phasr

Phasr

Open-source desktop workspace for running parallel AI coding agents with Git worktree isolation.
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Phasr is a free, open-source AI code editor that lets you run multiple coding agents in parallel. Each agent works in its own isolated Git worktree, preventing file collisions. Real-time diffs, per-agent status tracking, and human-in-the-loop review workflows ensure you stay in control before merging. Supports Claude Code, Codex CLI, Gemini CLI, Cursor, Aider, and any CLI-based agent. One-click deep links to VS Code, JetBrains, Xcode, and more.

Free
Phasr screen shot

How to use Phasr?

Download the macOS app from GitHub releases or build from source. Launch Phasr, connect your Git repository, and create tasks. Assign each task to a compatible agent (Claude, Codex, etc.) by configuring the CLI command. Agents run automatically in isolated Git worktrees. Review changes in the built-in diff viewer, approve or reject per file, then merge approved changes to your main branch. You can also open any worktree in your preferred IDE with a single click.

Phasr 's Core Features

  • Run dozens of AI coding agents in parallel without conflicts
  • Git worktree isolation for each agent task
  • Real-time file-level diffs and change summaries
  • Human-in-the-loop review with approve/reject/modify
  • Universal agent compatibility (Claude, Codex, Gemini, Cursor, Aider, etc.)
  • One-click open in VS Code, Cursor, JetBrains, or any editor

    • Phasr 's Use Cases

  • Orchestrate multiple AI agents to implement features simultaneously
  • Review and merge agent-generated code safely with isolated worktrees
  • Run Claude for backend logic while Codex works on frontend in parallel
  • Migrate codebases with parallel agent tasks, each in its own worktree
  • Fix bugs across different modules without collision using separate agents
  • Onboard new team members with agent-assisted code generation and review

    • Phasr 's FAQ

    Most impacted jobs

    Software Engineer
    DevOps Engineer
    Engineering Manager
    Technical Lead
    AI Engineer
    Full-Stack Developer

    Phasr 's Tags

    #AI coding agents#parallel execution#Git worktree#code review#open source#developer tools#agent orchestration#human in the loop

    Phasr 's Alternatives