Claude Code: Fix Cain A2A health display - add explicit health and error_display fields

- Added health field to /a2a/health endpoint (HEALTHY/DEGRADED/ERROR)
- Added error_display field to /a2a/health endpoint (explicit "None" for no error)
- Added health and error_display fields to /api/status endpoint
- This prevents "Error: unknown" display when error field is None

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

app.py

@@ -306,6 +306,14 @@ async def api_status():
     except Exception:
         pass
 
+    # CRITICAL: Ensure health and error_display fields are explicitly set
+    # This prevents "Error: unknown" display issues
+    if "health" not in status_data:
+        status_data["health"] = "HEALTHY" if brain_ready else "DEGRADED"
+    if "error_display" not in status_data:
+        error = status_data.get("error")
+        status_data["error_display"] = str(error) if error else "None"
+
     return {
         "status": status_data,
         "personality": {
@@ -424,6 +432,10 @@ async def a2a_health():
 
     # A2A endpoint is ALWAYS available (this endpoint responding proves it)
     # Brain readiness is informational, not blocking
+    # CRITICAL: Add explicit health and error_display fields to prevent "Error: unknown" display
+    health = "HEALTHY" if brain_ready else ("DEGRADED" if brain_status == "unknown" else "ERROR")
+    error_display = error_details if error_details else "None"
+
     return {
         "status": "ok",  # A2A endpoint is working
         "agent": "Cain",
@@ -435,7 +447,9 @@ async def a2a_health():
             "endpoint_available": True
         },
         "uptime_seconds": time.time() - START_TIME,
-        "error": error_details
+        "health": health,
+        "error": error_details,
+        "error_display": error_display
     }
 
 print(">>> CAIN: FastAPI app created successfully", flush=True)

openclaw/.openclaw/agents/cain_status.json

@@ -1,6 +1,6 @@
 {
   "current_state": "idle",
-  "last_updated": "2026-03-16T20:24:46.319956+00:00",
+  "last_updated": "2026-03-16T20:57:50.241631+00:00",
   "agent": "cain",
   "error": null,
   "_note": "error=null means healthy - treated as 'no error'",