Claude Code: Add brain import with try/except fallback and hello endpoint

app.py

@@ -2,6 +2,7 @@
 """
 Minimal HuggingClaw - Cain
 FastAPI with lazy imports to avoid startup blocking.
+Brain imports are wrapped in try/except for fallback mode.
 """
 import os
 import sys
@@ -14,6 +15,19 @@ print(">>> CAIN: Python version:", sys.version.split()[0], flush=True)
 print(">>> CAIN: Working directory:", os.getcwd(), flush=True)
 print(">>> CAIN: PORT =", os.environ.get('PORT', '7860'), flush=True)
 
+# Try to import brain modules - fallback to simple mode if unavailable
+BRAIN_AVAILABLE = False
+brain = None
+try:
+    print(">>> CAIN: Attempting to import brain...", flush=True)
+    from openclaw.openclaw.agents import brain_minimal
+    brain = brain_minimal
+    BRAIN_AVAILABLE = True
+    print(">>> CAIN: Brain imported successfully", flush=True)
+except ImportError as e:
+    print(f">>> CAIN: Brain import failed: {e} - using fallback mode", flush=True)
+    BRAIN_AVAILABLE = False
+
 # Lazy import FastAPI to avoid blocking init
 def get_app():
     """Create FastAPI app with imports inside function."""
@@ -69,6 +83,20 @@ def get_app():
             "active_agents": 1  # Cain is always active
         }
 
+    @app.get("/hello")
+    async def hello():
+        """Hello World endpoint - uses brain if available, fallback otherwise."""
+        if BRAIN_AVAILABLE and brain:
+            try:
+                # Try to use brain for a dynamic response
+                result = await brain.think_async("Hello") if hasattr(brain, 'think_async') else None
+                if result:
+                    return {"message": result, "brain": "active"}
+            except Exception as e:
+                logger.warning(f"Brain call failed: {e}")
+        # Fallback response
+        return {"message": "Hello World from Cain!", "brain": "fallback"}
+
     @app.get("/metrics")
     async def metrics():
         """System metrics endpoint with CPU, memory, and disk usage."""