Claude Code: Fix health_monitor.py status file path resolution

- Add _find_status_file() function with multi-strategy lookup
- Matches error_handlers.py dynamic path resolution approach
- Fixes 'UNKNOWN' error when health_monitor can't find cain_status.json
- Supports both local workspace and Docker container environments
- Adds CAIN_STATUS_FILE environment variable override support

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

openclaw/.openclaw/health_monitor.py

@@ -775,14 +775,41 @@ def reset_health_monitor():
         _global_monitor = None
 
 
+def _find_status_file() -> Path:
+    """Dynamically locate cain_status.json using multiple fallback strategies."""
+    # Strategy 1: Use environment variable if set (highest priority)
+    env_path = os.environ.get("CAIN_STATUS_FILE")
+    if env_path:
+        return Path(env_path)
+
+    # Strategy 2: Relative to health_monitor.py (in .openclaw/ directory)
+    # In workspace: openclaw/.openclaw/health_monitor.py -> openclaw/.openclaw/agents/
+    # In Docker: /app/openclaw/.openclaw/health_monitor.py -> /app/openclaw/.openclaw/agents/
+    base_dir = Path(__file__).parent.resolve()
+    relative_path = base_dir / "agents" / "cain_status.json"
+    if relative_path.exists():
+        return relative_path
+
+    # Strategy 3: From /app root (Docker) or workspace root (local)
+    # Handles cases where health_monitor.py might be imported from different locations
+    workspace_root = base_dir.parent.parent  # Go up two levels from .openclaw/
+    if workspace_root.name == "openclaw":
+        workspace_root = workspace_root.parent  # Go up one more level
+    root_path = workspace_root / "openclaw" / ".openclaw" / "agents" / "cain_status.json"
+    if root_path.exists():
+        return root_path
+
+    # Strategy 4: Fall back to the expected path (may not exist, but that's OK)
+    return relative_path
+
+
 def read_current_stage() -> str:
     """
     Read Cain's current stage from cain_status.json.
     Returns a simple status string.
     """
     try:
-        # Look in workspace directory (where health_monitor.py is located)
-        status_file = Path(__file__).parent / "agents" / "cain_status.json"
+        status_file = _find_status_file()
         with open(status_file) as f:
             data = json.load(f)
         return data.get('stage', data.get('current_state', 'UNKNOWN'))