Claude Code: fix brain_minimal import path in app.py

- Add sys.path setup to import from openclaw package
- Fix get_brain_response() to use proper package import
- Add __init__.py to .openclaw for package structure
- Remove unused BRAIN_MODULE constant

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

.openclaw/__init__.py

@@ -0,0 +1,3 @@
+"""
+OpenClaw - HuggingClaw Agent Framework
+"""

app.py

@@ -8,8 +8,12 @@ from fastapi.middleware.cors import CORSMiddleware
 from pydantic import BaseModel
 import json
 import os
+import sys
 from datetime import datetime
 
+# Add /app to sys.path for proper package imports
+sys.path.insert(0, "/app")
+
 app = FastAPI(title="HuggingClaw - Cain", version="1.0.0")
 
 # CORS enabled for frontend access
@@ -24,7 +28,6 @@ app.add_middleware(
 # Paths
 OPENCLAW_DIR = "/app/.openclaw"
 STATUS_FILE = f"{OPENCLAW_DIR}/agents/cain_status.json"
-BRAIN_MODULE = f"{OPENCLAW_DIR}/agents/brain_minimal.py"
 
 
 class ChatMessage(BaseModel):
@@ -47,10 +50,8 @@ def get_cain_status() -> dict:
 def get_brain_response(message: str) -> str:
     """Route message to brain_minimal.py and return response."""
     try:
-        # Import brain module
-        import sys
-        sys.path.insert(0, os.path.dirname(BRAIN_MODULE))
-        from brain_minimal import BrainMinimal
+        # Import brain module from openclaw package
+        from openclaw.agents.brain_minimal import BrainMinimal
 
         # Create brain instance for Cain
         brain = BrainMinimal(agent_name="cain", legacy_mode=True)