Independent verification — a second Claude solves the same problem blind in a worktree, then both approaches are compared
How to install doppelganger?
cukas/evil-twin/doppelganger
$npx -y skills add cukas/evil-twin --skill doppelgangerInstalls into the current project.
›Prefer a prompt? Paste this to your agent
Run `npx skills use "https://github.com/cukas/evil-twin" --skill "cukas/evil-twin/doppelganger"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/cukas/evil-twin" that are relevant to the current task. Run `npx skills add "https://github.com/cukas/evil-twin"` and select the relevant skills, then follow their instructions.
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