Claude Code: Fix brain_minimal to explicitly clear error field on status updates

The _update_status_file() method now explicitly sets error: None and
preserves startup_checks field. This ensures stale errors don't persist
in the status file.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

openclaw/.openclaw/agents/brain_minimal.py

@@ -222,29 +222,34 @@ class AgentStateMachine:
 
     def _update_status_file(self):
         """Update cain_status.json with current state and timestamp."""
-        # Read existing status file to preserve stage and a2a fields
+        # Read existing status file to preserve stage, a2a, and startup_checks fields
         existing_stage = None
         existing_a2a = None
+        existing_startup_checks = None
         try:
             if self._status_file.exists():
                 with open(self._status_file, "r") as f:
                     existing_data = json.load(f)
                     existing_stage = existing_data.get("stage")
                     existing_a2a = existing_data.get("a2a")
+                    existing_startup_checks = existing_data.get("startup_checks")
         except Exception:
-            pass  # If read fails, we'll create new status without stage/a2a
+            pass  # If read fails, we'll create new status without preserved fields
 
         status_data = {
             "current_state": self._state.value,
             "last_updated": datetime.utcnow().isoformat() + "+00:00",
-            "agent": self._agent_name
+            "agent": self._agent_name,
+            "error": None  # Explicitly clear error when state machine updates
         }
 
-        # Preserve stage and a2a fields if they existed
+        # Preserve stage, a2a, and startup_checks fields if they existed
         if existing_stage:
             status_data["stage"] = existing_stage
         if existing_a2a:
             status_data["a2a"] = existing_a2a
+        if existing_startup_checks:
+            status_data["startup_checks"] = existing_startup_checks
 
         try:
             with open(self._status_file, "w") as f: