Align conftest mock herdr and unit test assertions with Claude's simplified session-based isolation and native herdr command updates

.agents/skills/multi-agent-mux-monitor/scripts/reconcile.sh

@@ -413,6 +413,11 @@ if herdr_confirmed:
         name = t['name']
         if name in yaml_session_names:
             continue
+        workspace_root = os.environ.get('WORKSPACE_ROOT')
+        if not workspace_root:
+            workspace_root = os.path.abspath(os.path.join(os.path.dirname(yaml_path), '..'))
+        if os.path.exists(os.path.join(workspace_root, '.mam', f"purging-{name}")):
+            continue
         if name.endswith('-creator-claude'):
             agent = 'claude'
         elif name.endswith('-creator-agy'):
@@ -445,7 +450,7 @@ if herdr_confirmed:
             'pane': {'index': 0, 'pid': pm['pid'], 'cmd': agent, 'cmd_full': cmd_full, 'cwd': pm['cwd']},
             # P2: cwd 인용
             'start_command': f'herdr {server_opt}new-session -d -s "{name}" -x 140 -y 40 -c "{pm["cwd"]}" "{cmd_full}"',
-            'attach_command': f'herdr {server_opt}attach -t {name}',
+            'attach_command': f'herdr {server_opt}agent attach {name}',
             'kill_command': f'herdr {server_opt}kill-session -t {name}',
             'last_visible_status': 'running',
             'last_visible_note': 'auto-registered by monitor',