box Node {
    public weak parent
    name

    setParent(p) {
        me.parent = weak p  // ✅ Explicit weak operator (Phase 285W-Syntax-0)
    }
}

static box Main {
    main() {
        local n1 = new Node()
        local n2 = new Node()
        n1.setParent(n2)
        print("OK: public weak parent sugar syntax")
        return 0
    }
}