feat(agent): add Grok Build TUI adapter, runtime dispatch, and skill support

.agents/skills/multi-agent-mux-stop/scripts/stop_session.sh

@@ -94,8 +94,8 @@ while [ $# -gt 0 ]; do
 done
 if [ -n "$AGENT" ]; then
   case "$AGENT" in
-    claude|agy|hermes|cline) ;;
-    *) echo "ERROR: invalid agent type '$AGENT'. Allowed types are: claude, agy, hermes, cline." >&2; exit 2 ;;
+    claude|agy|hermes|cline|grok) ;;
+    *) echo "ERROR: invalid agent type '$AGENT'. Allowed types are: claude, agy, hermes, cline, grok." >&2; exit 2 ;;
   esac
 fi
 [ -n "$SESSION_NAME" ] || { echo "ERROR: --session required" >&2; usage; exit 2; }
@@ -290,6 +290,8 @@ if captured and not purge:
         target['hermes_conversation_id_own'] = captured
     elif agent == 'cline':
         target['cline_conversation_id_own'] = captured
+    elif agent == 'grok':
+        target['grok_session_id_own'] = captured
     target['resumable'] = True
 
 if purge and purge_uuid: