diff --git a/predix.py b/predix.py
index e51d5183..74347bd5 100644
--- a/predix.py
+++ b/predix.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python
+import logging
 """
 Predix CLI - Wrapper for rdagent with LLM model selection.
 
@@ -49,7 +50,7 @@ def _ensure_kronos_factor_in_pool(con) -> None:
             if existing.get("ic") is not None:
                 return
         except Exception:
-            pass
+            logging.debug("Exception caught", exc_info=True)
 
     con.print("\n[bold yellow]Kronos Factor[/bold yellow] not in pool — generating automatically...")
     con.print("  [dim]stride=500 (~4500 windows), batch=32 — ~5-10 min on GPU[/dim]")
diff --git a/rdagent/app/finetune/llm/ui/components.py b/rdagent/app/finetune/llm/ui/components.py
index 75242a8b..dbec703e 100644
--- a/rdagent/app/finetune/llm/ui/components.py
+++ b/rdagent/app/finetune/llm/ui/components.py
@@ -1,3 +1,4 @@
+import logging
 """
 FT UI Components - Hierarchical Event Renderers
 """
@@ -223,7 +224,7 @@ def render_scenario(content: Any) -> None:
             timeout_hours = content.real_full_timeout() / 60 / 60
             st.markdown(f"**Full Train Timeout:** {timeout_hours:.2f} hours")
         except Exception:
-            pass
+            logging.debug("Exception caught", exc_info=True)
 
     # 4. Device info - formatted nicely
     if hasattr(content, "device_info") and content.device_info:
diff --git a/rdagent/app/rl/ui/rl_summary.py b/rdagent/app/rl/ui/rl_summary.py
index ebb72908..f9cc013f 100644
--- a/rdagent/app/rl/ui/rl_summary.py
+++ b/rdagent/app/rl/ui/rl_summary.py
@@ -1,3 +1,4 @@
+import logging
 """
 RL Job Summary View
 Display summary table for all tasks in a job directory
@@ -43,7 +44,7 @@ def get_loop_status(task_path: Path, loop_id: int) -> tuple[str, bool | None]:
                 feedback_decision = decision
                 break
         except Exception:
-            pass
+            logging.debug("Exception caught", exc_info=True)
 
     if feedback_decision is not None:
         return ("OK" if feedback_decision else "X"), feedback_decision
diff --git a/rdagent/components/coder/factor_coder/factor.py b/rdagent/components/coder/factor_coder/factor.py
index 6312f8a8..f565cdd1 100644
--- a/rdagent/components/coder/factor_coder/factor.py
+++ b/rdagent/components/coder/factor_coder/factor.py
@@ -1,3 +1,4 @@
+import logging
 from __future__ import annotations
 
 import subprocess
diff --git a/rdagent/components/coder/kronos_adapter.py b/rdagent/components/coder/kronos_adapter.py
index af7e6f35..3bca9a04 100644
--- a/rdagent/components/coder/kronos_adapter.py
+++ b/rdagent/components/coder/kronos_adapter.py
@@ -355,7 +355,7 @@ def evaluate_kronos_model(
                     predicted_returns.append(pred_ret)
                     actual_returns.append(actual_ret)
                 except Exception:
-                    pass
+                    logging.debug("Exception caught", exc_info=True)
 
     pred_arr = np.array(predicted_returns)
     actual_arr = np.array(actual_returns)
diff --git a/rdagent/components/coder/model_coder/benchmark/gt_code/A-DGN.py b/rdagent/components/coder/model_coder/benchmark/gt_code/A-DGN.py
index 91cba514..d048169e 100644
--- a/rdagent/components/coder/model_coder/benchmark/gt_code/A-DGN.py
+++ b/rdagent/components/coder/model_coder/benchmark/gt_code/A-DGN.py
@@ -1,3 +1,4 @@
+import logging
 import math
 from typing import Any, Callable, Dict, Optional, Union
 
diff --git a/rdagent/components/coder/model_coder/benchmark/gt_code/dirgnn.py b/rdagent/components/coder/model_coder/benchmark/gt_code/dirgnn.py
index cd0a178a..f1cbcc89 100644
--- a/rdagent/components/coder/model_coder/benchmark/gt_code/dirgnn.py
+++ b/rdagent/components/coder/model_coder/benchmark/gt_code/dirgnn.py
@@ -1,3 +1,4 @@
+import logging
 import copy
 
 import torch
diff --git a/rdagent/components/coder/model_coder/benchmark/gt_code/gpsconv.py b/rdagent/components/coder/model_coder/benchmark/gt_code/gpsconv.py
index 92491338..edda2419 100644
--- a/rdagent/components/coder/model_coder/benchmark/gt_code/gpsconv.py
+++ b/rdagent/components/coder/model_coder/benchmark/gt_code/gpsconv.py
@@ -1,3 +1,4 @@
+import logging
 import inspect
 from typing import Any, Dict, Optional
 
diff --git a/rdagent/components/coder/model_coder/benchmark/gt_code/linkx.py b/rdagent/components/coder/model_coder/benchmark/gt_code/linkx.py
index 332c2075..fc2463ce 100644
--- a/rdagent/components/coder/model_coder/benchmark/gt_code/linkx.py
+++ b/rdagent/components/coder/model_coder/benchmark/gt_code/linkx.py
@@ -1,3 +1,4 @@
+import logging
 import math
 
 import torch
diff --git a/rdagent/components/coder/model_coder/benchmark/gt_code/pmlp.py b/rdagent/components/coder/model_coder/benchmark/gt_code/pmlp.py
index de93fda5..9ba08ee2 100644
--- a/rdagent/components/coder/model_coder/benchmark/gt_code/pmlp.py
+++ b/rdagent/components/coder/model_coder/benchmark/gt_code/pmlp.py
@@ -1,3 +1,4 @@
+import logging
 from typing import Optional
 
 import torch
diff --git a/rdagent/components/coder/model_coder/benchmark/gt_code/visnet.py b/rdagent/components/coder/model_coder/benchmark/gt_code/visnet.py
index e859ceca..1aedf3fd 100644
--- a/rdagent/components/coder/model_coder/benchmark/gt_code/visnet.py
+++ b/rdagent/components/coder/model_coder/benchmark/gt_code/visnet.py
@@ -1,3 +1,4 @@
+import logging
 import math
 from typing import Optional, Tuple
 
diff --git a/rdagent/components/coder/model_coder/gt_code.py b/rdagent/components/coder/model_coder/gt_code.py
index 49f0e955..1055eb1b 100644
--- a/rdagent/components/coder/model_coder/gt_code.py
+++ b/rdagent/components/coder/model_coder/gt_code.py
@@ -1,3 +1,4 @@
+import logging
 """
 This is just an exmaple.
 It will be replaced wtih a list of ground truth tasks.
diff --git a/rdagent/log/daily_log.py b/rdagent/log/daily_log.py
index df817b64..924370c6 100644
--- a/rdagent/log/daily_log.py
+++ b/rdagent/log/daily_log.py
@@ -1,3 +1,4 @@
+import logging
 """
 Daily-rotating log for all Predix commands.
 
@@ -103,7 +104,7 @@ def log_llm_call(
         try:
             entry["duration_ms"] = int((end_time - start_time).total_seconds() * 1000)
         except Exception:
-            pass
+            logging.debug("Exception caught", exc_info=True)
     line = _json.dumps(entry, ensure_ascii=False)
     out_path = _today_dir() / "llm_calls.jsonl"
     with _llm_log_lock:
diff --git a/rdagent/scenarios/data_science/debug/data.py b/rdagent/scenarios/data_science/debug/data.py
index b2c06ffa..e94573e0 100644
--- a/rdagent/scenarios/data_science/debug/data.py
+++ b/rdagent/scenarios/data_science/debug/data.py
@@ -1,3 +1,4 @@
+import logging
 import json
 import os
 import shutil
diff --git a/rdagent/scenarios/data_science/proposal/exp_gen/select/submit.py b/rdagent/scenarios/data_science/proposal/exp_gen/select/submit.py
index bd89a014..67548182 100644
--- a/rdagent/scenarios/data_science/proposal/exp_gen/select/submit.py
+++ b/rdagent/scenarios/data_science/proposal/exp_gen/select/submit.py
@@ -1,3 +1,4 @@
+import logging
 import json
 import os
 import pickle  # nosec B301
diff --git a/rdagent/scenarios/kaggle/developer/coder.py b/rdagent/scenarios/kaggle/developer/coder.py
index b98a7c18..225260ab 100644
--- a/rdagent/scenarios/kaggle/developer/coder.py
+++ b/rdagent/scenarios/kaggle/developer/coder.py
@@ -1,3 +1,4 @@
+import logging
 import json
 from typing import Dict, List
 
diff --git a/rdagent/scenarios/rl/autorl_bench/agents/example_agent/train.py b/rdagent/scenarios/rl/autorl_bench/agents/example_agent/train.py
index 3ba05d6c..86b6745f 100644
--- a/rdagent/scenarios/rl/autorl_bench/agents/example_agent/train.py
+++ b/rdagent/scenarios/rl/autorl_bench/agents/example_agent/train.py
@@ -1,3 +1,4 @@
+import logging
 """
 GRPO Training Loop
 """