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How to compare agent results across parallel worktrees with Orca

Send one prompt to several agents in separate worktrees, then compare results and merge the best one.

Who it is forA developer facing a task with several reasonable approaches who wants to see how different coding agents handle it before choosing one.

The problemRunning several agents on the same repo by hand causes file conflicts, and it is hard to keep track of which output came from which agent.

The outcomeEach agent works in its own isolated git worktree, you compare the results side by side, and you merge the one you prefer.

What you need first

  • A desktop computer running macOS, Windows, or Linux
  • A git repository to work in
  • At least one CLI coding agent (such as Claude Code, Codex, or OpenCode) that you already have access to with your own subscription

Steps

  1. Install Orca with brew install --cask stablyai/orca/orca on macOS, or download a build from https://onorca.dev/download for your system.
  2. Open your repository in Orca.
  3. Start one agent per worktree, such as Claude Code, Codex, and OpenCode, using the same prompt.
  4. Review each worktree's changes and compare the results.
  5. Merge the winning worktree into your branch with git.

Prompt for your agent

In the stablyai/orca repo context, use Orca's Parallel Worktrees to run the prompt in <task-file> across three agents, each in its own git worktree. Output a short comparison of the three diffs, naming the one to merge. Verify that each worktree is isolated by checking that the three branches differ and that the original checkout is unchanged.

Caveat. Each agent still needs its own working access, and Orca does not replace the agent's own setup or sign-in.

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