fix(broker): detect and reconnect a blackholed fleet terminal socket

CHANGELOG.md

@@ -5,7 +5,11 @@ All notable changes to Agent Relay will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [Unreleased - Patch]
+
+### Fixed
+
+- Fleet terminal attach (`agent-relay node agent attach --node`) now reconnects automatically when the terminal websocket goes silent, instead of appearing connected forever and permanently stopping on long-lived nodes.
 
 ## [11.6.3] - 2026-08-14
 

crates/broker/src/runtime/init.rs

@@ -338,6 +338,7 @@ pub(crate) async fn run_init(cmd: InitCommand, telemetry: TelemetryClient) -> Re
         crate::terminal_control::TerminalControlConfig {
             ws_url: terminal_ws_url,
             session_token: session_node_token.clone(),
+            read_idle_timeout: None,
         },
         terminal_control_rx,
         terminal_event_tx,