topology: operator-driven move-agent via set_parent (#486)

hive-c0re/src/main.rs

@@ -102,6 +102,19 @@ enum Cmd {
     Approve { id: i64 },
     /// Deny a pending request by id.
     Deny { id: i64 },
+    /// Move an agent in the topology tree (#486). Set `--parent` to
+    /// a new parent agent name; pass `--root` to promote the agent
+    /// to root (no parent). Refuses cycles, unknown agents, and
+    /// any attempt to reparent the manager.
+    SetParent {
+        child: String,
+        /// New parent agent name. Mutually exclusive with `--root`.
+        #[arg(long, conflicts_with = "root")]
+        parent: Option<String>,
+        /// Promote `child` to root (no parent).
+        #[arg(long)]
+        root: bool,
+    },
 }
 
 #[tokio::main]
@@ -143,6 +156,20 @@ async fn main() -> Result<()> {
             render(client::request(&cli.socket, HostRequest::Approve { id }).await?)
         }
         Cmd::Deny { id } => render(client::request(&cli.socket, HostRequest::Deny { id }).await?),
+        Cmd::SetParent {
+            child,
+            parent,
+            root,
+        } => {
+            let new_parent = if root { None } else { parent };
+            render(
+                client::request(
+                    &cli.socket,
+                    HostRequest::SetParent { child, new_parent },
+                )
+                .await?,
+            )
+        }
     }
 }