diff --git a/docs/CONFIGURATION_GUIDE.md b/docs/CONFIGURATION_GUIDE.md
index b00593fd0..321d943d8 100644
--- a/docs/CONFIGURATION_GUIDE.md
+++ b/docs/CONFIGURATION_GUIDE.md
@@ -269,7 +269,7 @@ models:
     
     # Fallback models for different providers
     provider_models:
-      siliconflow: "qwen/qwen-max"
+      siliconflow: "qwen/qwen3-max"
       google: "gemini-2.5-flash"
     
     # Model-specific parameters (override provider defaults)
diff --git a/python/configs/providers/openrouter.yaml b/python/configs/providers/openrouter.yaml
index 30a3188af..2f89555ec 100644
--- a/python/configs/providers/openrouter.yaml
+++ b/python/configs/providers/openrouter.yaml
@@ -12,7 +12,7 @@ connection:
   api_key_env: "OPENROUTER_API_KEY"
 
 # Default model if none specified
-default_model: "qwen/qwen-max"
+default_model: "qwen/qwen3-max"
 
 # Model Parameters Defaults
 defaults:
@@ -29,8 +29,8 @@ models:
     name: "Claude Haiku 4.5"
   - id: "x-ai/grok-4"
     name: "Grok 4"
-  - id: "qwen/qwen-max"
-    name: "Qwen Max"
+  - id: "qwen/qwen3-max"
+    name: "Qwen3 Max"
   - id: "openai/gpt-5"
     name: "GPT-5"
   - id: "google/gemini-2.5-flash"
diff --git a/python/valuecell/agents/common/trading/_internal/coordinator.py b/python/valuecell/agents/common/trading/_internal/coordinator.py
index fba7aeef2..08d43f4ea 100644
--- a/python/valuecell/agents/common/trading/_internal/coordinator.py
+++ b/python/valuecell/agents/common/trading/_internal/coordinator.py
@@ -5,6 +5,7 @@
 
 from loguru import logger
 
+from valuecell.utils.ts import get_current_timestamp_ms
 from valuecell.utils.uuid import generate_uuid
 
 from ..decision import BaseComposer
@@ -37,7 +38,6 @@
 from ..utils import (
     extract_market_snapshot_features,
     fetch_free_cash_from_gateway,
-    get_current_timestamp_ms,
 )
 
 # Core interfaces for orchestration and portfolio service.
diff --git a/python/valuecell/agents/common/trading/_internal/stream_controller.py b/python/valuecell/agents/common/trading/_internal/stream_controller.py
index 00c5f3dde..8a364b5c5 100644
--- a/python/valuecell/agents/common/trading/_internal/stream_controller.py
+++ b/python/valuecell/agents/common/trading/_internal/stream_controller.py
@@ -15,9 +15,9 @@
 from loguru import logger
 
 from valuecell.agents.common.trading import models as agent_models
-from valuecell.agents.common.trading.utils import get_current_timestamp_ms
 from valuecell.server.db.repositories.strategy_repository import get_strategy_repository
 from valuecell.server.services import strategy_persistence
+from valuecell.utils.ts import get_current_timestamp_ms
 
 if TYPE_CHECKING:
     from valuecell.agents.common.trading._internal.coordinator import (
diff --git a/python/valuecell/agents/common/trading/decision/prompt_based/composer.py b/python/valuecell/agents/common/trading/decision/prompt_based/composer.py
index a7698c6a5..bb087b12e 100644
--- a/python/valuecell/agents/common/trading/decision/prompt_based/composer.py
+++ b/python/valuecell/agents/common/trading/decision/prompt_based/composer.py
@@ -1,7 +1,6 @@
 from __future__ import annotations
 
 import json
-from datetime import datetime, timezone
 from typing import Dict
 
 from agno.agent import Agent as AgnoAgent
@@ -87,7 +86,9 @@ async def compose(self, context: ComposeContext) -> ComposeResult:
                 return ComposeResult(instructions=[], rationale=plan.rationale)
         except Exception as exc:  # noqa: BLE001
             logger.error("LLM invocation failed: {}", exc)
-            return ComposeResult(instructions=[], rationale="LLM invocation failed")
+            return ComposeResult(
+                instructions=[], rationale=f"LLM invocation failed: {exc}"
+            )
 
         # Optionally forward non-NOOP plan rationale to Discord webhook (env-driven)
         try:
@@ -210,9 +211,13 @@ async def _call_llm(self, prompt: str) -> TradePlanProposal:
 
         logger.error("LLM output failed validation: {}", content)
         return TradePlanProposal(
-            ts=int(datetime.now(timezone.utc).timestamp() * 1000),
             items=[],
-            rationale="LLM output failed validation",
+            rationale=(
+                "LLM output failed validation. The model you chose "
+                f"`{model_utils.describe_model(model)}` "
+                "may be incompatible or returned unexpected output. "
+                f"Raw output: {content}"
+            ),
         )
 
     async def _send_plan_to_discord(self, plan: TradePlanProposal) -> None:
diff --git a/python/valuecell/agents/common/trading/features/market_snapshot.py b/python/valuecell/agents/common/trading/features/market_snapshot.py
index 12fbc9e95..203ca3576 100644
--- a/python/valuecell/agents/common/trading/features/market_snapshot.py
+++ b/python/valuecell/agents/common/trading/features/market_snapshot.py
@@ -11,7 +11,7 @@
     InstrumentRef,
     MarketSnapShotType,
 )
-from valuecell.agents.common.trading.utils import get_current_timestamp_ms
+from valuecell.utils.ts import get_current_timestamp_ms
 
 
 class MarketSnapshotFeatureComputer:
diff --git a/python/valuecell/agents/common/trading/models.py b/python/valuecell/agents/common/trading/models.py
index 636da20b8..1d378c0ee 100644
--- a/python/valuecell/agents/common/trading/models.py
+++ b/python/valuecell/agents/common/trading/models.py
@@ -4,6 +4,8 @@
 
 from pydantic import BaseModel, Field, field_validator, model_validator
 
+from valuecell.utils.ts import get_current_timestamp_ms
+
 from .constants import (
     DEFAULT_AGENT_MODEL,
     DEFAULT_CAP_FACTOR,
@@ -588,7 +590,10 @@ def _normalize_instrument(cls, data):
 class TradePlanProposal(BaseModel):
     """Structured output before rule normalization."""
 
-    ts: int
+    ts: Optional[int] = Field(
+        default_factory=get_current_timestamp_ms,
+        description="Proposal timestamp in ms (if available)",
+    )
     items: List[TradeDecisionItem] = Field(default_factory=list)
     rationale: Optional[str] = Field(
         default=None, description="Optional natural language rationale"
diff --git a/python/valuecell/agents/common/trading/utils.py b/python/valuecell/agents/common/trading/utils.py
index 82e56b4f2..6742cead2 100644
--- a/python/valuecell/agents/common/trading/utils.py
+++ b/python/valuecell/agents/common/trading/utils.py
@@ -1,5 +1,4 @@
 import os
-from datetime import datetime, timezone
 from typing import Dict, List, Optional, Tuple
 
 import ccxt.pro as ccxtpro
@@ -13,11 +12,6 @@
 from valuecell.agents.common.trading.models import FeatureVector
 
 
-def get_current_timestamp_ms() -> int:
-    """Get current timestamp in milliseconds."""
-    return int(datetime.now(timezone.utc).timestamp() * 1000)
-
-
 async def fetch_free_cash_from_gateway(
     execution_gateway, symbols: list[str]
 ) -> Tuple[float, float]:
diff --git a/python/valuecell/utils/model.py b/python/valuecell/utils/model.py
index 54105be36..be452c30d 100644
--- a/python/valuecell/utils/model.py
+++ b/python/valuecell/utils/model.py
@@ -9,7 +9,6 @@
 - Backward compatible: Environment variables still work for model_id override
 """
 
-import logging
 import os
 from typing import Optional
 
@@ -19,6 +18,7 @@
 from agno.models.openai import OpenAILike as AgnoOpenAILikeModel
 from agno.models.openrouter import OpenRouter as AgnoOpenRouterModel
 from agno.models.siliconflow import Siliconflow as AgnoSiliconflowModel
+from loguru import logger
 
 from valuecell.adapters.models.factory import (
     create_embedder,
@@ -27,7 +27,14 @@
     create_model_for_agent,
 )
 
-logger = logging.getLogger(__name__)
+
+def describe_model(model: AgnoModel) -> str:
+    try:
+        model_description = f"{model.id} (via {model.provider})"
+    except Exception:
+        model_description = "unknown model/provider"
+
+    return model_description
 
 
 def model_should_use_json_mode(model: AgnoModel) -> bool:
diff --git a/python/valuecell/utils/ts.py b/python/valuecell/utils/ts.py
new file mode 100644
index 000000000..aeda31373
--- /dev/null
+++ b/python/valuecell/utils/ts.py
@@ -0,0 +1,6 @@
+from datetime import datetime, timezone
+
+
+def get_current_timestamp_ms() -> int:
+    """Get current timestamp in milliseconds."""
+    return int(datetime.now(timezone.utc).timestamp() * 1000)