Proposer-Reviewer

Proposer-Reviewer paradigm: one model proposes an action, the other independently verifies it. Two mechanisms: pre-approval (like dual-signing in banking – for irreversible operations: payments, sending emails, changing configurations) and post-hoc verification with modality switching (render a document and visually inspect, run the system in a sandbox). Rules: models from different families of comparable level (cognitive diversity); base rules coincide, focus differs; rejection is returned to the trajectory as a tool error.

Related: [Sidecar Mechanism], [Multi-Agent Interaction Without Shared Context]