fix(cli): persist sessions before shutdown

cli.py

@@ -11550,6 +11550,36 @@ class HermesCLI(CLIAgentSetupMixin, CLICommandsMixin):
         except Exception:
             pass
 
+    def _persist_active_session_before_close(self):
+        """Best-effort SQLite/JSON flush before the CLI marks a session closed.
+
+        ``run_conversation()`` normally persists at turn boundaries, but a
+        terminal close/SIGHUP/SIGTERM can unwind the prompt_toolkit app while
+        the agent thread still holds the current turn only in memory.  Flush the
+        agent's live ``_session_messages`` before ``end_session()`` so resume,
+        session_search, and state.db do not lose the interrupted turn.
+        """
+        agent = getattr(self, "agent", None)
+        if not agent or not hasattr(agent, "_persist_session"):
+            return
+
+        messages = getattr(agent, "_session_messages", None)
+        if not isinstance(messages, list):
+            messages = getattr(self, "conversation_history", None)
+        if not isinstance(messages, list) or not messages:
+            return
+
+        conversation_history = getattr(self, "conversation_history", None)
+        if not isinstance(conversation_history, list):
+            conversation_history = messages
+
+        try:
+            agent._persist_session(messages, conversation_history)
+            if getattr(agent, "session_id", None):
+                self.session_id = agent.session_id
+        except (Exception, KeyboardInterrupt) as e:
+            logger.debug("Could not persist active CLI session before close: %s", e)
+
     def _print_exit_summary(self):
         """Print session resume info on exit, similar to Claude Code."""
         # Clear the screen + scrollback before printing the summary so the
@@ -14246,6 +14276,12 @@ class HermesCLI(CLIAgentSetupMixin, CLICommandsMixin):
             set_sudo_password_callback(None)
             set_approval_callback(None)
             set_secret_capture_callback(None)
+            # Flush any in-memory turn transcript before marking the session
+            # closed.  On SIGHUP/SIGTERM/window close the agent thread may not
+            # reach its normal run_conversation() persistence path before the
+            # daemon thread is reaped.
+            self._persist_active_session_before_close()
+
             # Close session in SQLite
             if hasattr(self, '_session_db') and self._session_db and self.agent:
                 try: