Why: Increment three landed across the chain (native #18, squad #17, backend #71); Dev pins must point at those merged component main heads so the tested combination is the released one. Evidence: check-pins exit=0; native c5b9dca, squad fc9620e and backend f0b0db9 are direct merge commits on their component mains. Impact: Three gitlinks. Refs: Agent-Native PR #18; Agent-Squad PR #17; Agent-System-Backend PR #71