Invoke a Rubber Duck Reviewer subagent to independently critique plans and implementations before proceeding. Use when the agent is about to implement a non-trivial plan (multi-file changes, architectural decisions, security-sensitive logic, database schema changes), after completing a self-contained unit of work (module, endpoint, feature), when stuck or facing repeated failures (same test fails 2+ times, unexpected results), or when the agent wants independent validation of assumptions and design decisions. Triggers on any non-trivial implementation task where independent critique would catch blind spots before they become costly mistakes.
How to install rubber-duck?
jim60105/copilot-prompt/rubber-duck
$npx -y skills add jim60105/copilot-prompt --skill rubber-duckInstalls into the current project.
›Prefer a prompt? Paste this to your agent
Run `npx skills use "https://github.com/jim60105/copilot-prompt" --skill "jim60105/copilot-prompt/rubber-duck"` 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/jim60105/copilot-prompt" that are relevant to the current task. Run `npx skills add "https://github.com/jim60105/copilot-prompt"` and select the relevant skills, then follow their instructions.
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