Claude Code: fix import path in error_handlers and simplify health/startup

- Fix: corrected brain_minimal import path in error_handlers.py
- Simplify: health check now always returns 200 OK without brain initialization
- Simplify: startup event removed blocking imports for faster startup

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

app.py

@@ -63,23 +63,6 @@ async def startup_event():
     logger.info(">>> STARTUP: startup_event triggered")
     logger.info(f">>> STARTUP: PORT={os.environ.get('PORT', '7860')}")
     logger.info(f">>> STARTUP: Working directory={os.getcwd()}")
-    logger.info(f">>> STARTUP: Python version={sys.version}")
-    logger.info(">>> STARTUP: Checking openclaw package...")
-
-    # Check if openclaw package is accessible
-    try:
-        import openclaw
-        logger.info(f">>> STARTUP: openclaw package found at: {openclaw.__file__}")
-    except ImportError as e:
-        logger.error(f">>> STARTUP: openclaw package NOT found: {e}")
-
-    # Check brain_minimal
-    try:
-        from openclaw.openclaw.agents.brain_minimal import BrainMinimal
-        logger.info(">>> STARTUP: brain_minimal module imported successfully")
-    except ImportError as e:
-        logger.warning(f">>> STARTUP: brain_minimal import failed: {e}")
-
     logger.info(">>> STARTUP: Initialization complete, ready to serve requests")
     print("Cain is ready")
 
@@ -105,59 +88,14 @@ async def root():
 @app.get("/health")
 async def health():
     """
-    Health check endpoint with graceful error handling.
-
-    Checks:
-    1. Basic API availability
-    2. Persistence files (JSON-based storage)
-    3. Brain import (if available)
+    Health check endpoint - always returns 200 OK.
 
-    Returns 200 OK with {"status": "ok"} if all critical checks pass.
-    Returns 503 with error details if critical failures occur.
+    This endpoint is used for uptime monitoring and should never fail.
     """
-    checks = {}
-    is_healthy = True
-
-    # 1. Check persistence files (graceful - don't crash if files don't exist)
-    try:
-        cain_status_path = "/app/openclaw/.openclaw/agents/cain_status.json"
-        if os.path.exists(cain_status_path):
-            checks["persistence"] = "ok"
-        else:
-            checks["persistence"] = "no data files yet"
-    except Exception as e:
-        checks["persistence"] = f"warning: {type(e).__name__}"
-        # Persistence issues are warnings, not critical failures
-
-    # 2. Check brain import (graceful - don't crash if import fails)
-    try:
-        from openclaw.openclaw.agents.brain_minimal import BrainMinimal
-        brain = BrainMinimal(agent_name="cain", legacy_mode=True)
-        checks["brain"] = "ok"
-    except ImportError:
-        checks["brain"] = "not available (optional)"
-    except Exception as e:
-        checks["brain"] = f"warning: {type(e).__name__}"
-        # Brain issues are warnings, not critical failures for health endpoint
-
-    # 3. Check frontend assets (graceful)
-    try:
-        index_path = "/app/static/index.html"
-        fallback_path = "/app/index.html"
-        if os.path.exists(index_path) or os.path.exists(fallback_path):
-            checks["frontend"] = "ok"
-        else:
-            checks["frontend"] = "not found"
-    except Exception as e:
-        checks["frontend"] = f"warning: {type(e).__name__}"
-
-    # Return 200 OK with status: ok for health endpoint
-    # This endpoint should never crash - it's for uptime monitoring
     return JSONResponse(
         status_code=http_status.HTTP_200_OK,
         content={
             "status": "ok",
-            "checks": checks,
             "uptime_seconds": round(time.time() - START_TIME, 2),
             "timestamp": time.time()
         }

error_handlers.py

@@ -112,7 +112,7 @@ def handle_brain_response(message: str) -> str:
         AttributeError: If required brain methods are missing.
     """
     try:
-        from agents.brain_minimal import BrainMinimal
+        from openclaw.openclaw.agents.brain_minimal import BrainMinimal
 
         brain = BrainMinimal(agent_name="cain", legacy_mode=True)
         result = brain._conversation_process(message)