multi-agent
Independent second opinions, natively.
You already have an agent defined for one coding CLI, a plain .claude/agents/*.md file. multi-agent runs that same agent on other model CLIs: grok, codex, claude. Each target executes it natively through its own agent runtime, no API keys and no re-implementation. When independent models converge on a finding you get confidence. When they diverge you get coverage.
The question
What changes when reviewers fail differently?
The experiment
Preserve the agent role. Change the model. Compare the findings.