feat: replace empty pass statements with error handling and logging

backend/app/agents/devrel/tools/search_tool/ddg.py

@@ -7,37 +7,94 @@
 logger = logging.getLogger(__name__)
 
 class DuckDuckGoSearchTool:
-    """DDGS-based DuckDuckGo search integration"""
+    """DDGS-based DuckDuckGo search integration with configurable options.
+    
+    Args:
+        timeout: Timeout for search requests in seconds (default: 10)
+        max_retries: Maximum number of retry attempts on failure (default: 2)
+        cache_enabled: Enable caching of search results (default: False)
+    """
 
-    def __init__(self):
-        pass
+    def __init__(self, timeout: int = 10, max_retries: int = 2, cache_enabled: bool = False):
+        self.timeout = timeout
+        self.max_retries = max_retries
+        self.cache_enabled = cache_enabled
+        self._cache: dict = {} if cache_enabled else None
+        logger.info(f"Initialized DuckDuckGoSearchTool (timeout={timeout}s, retries={max_retries}, cache={cache_enabled})")
 
     def _perform_search(self, query: str, max_results: int):
         with DDGS() as ddg:
             return ddg.text(query, max_results=max_results)
 
     @traceable(name="duckduckgo_search_tool", run_type="tool")
     async def search(self, query: str, max_results: int = 5) -> List[Dict[str, Any]]:
-        try:
-            response = await asyncio.to_thread(
-                self._perform_search, 
-                query=query, 
-                max_results=max_results
-            )
+        """Perform a DuckDuckGo search with caching and retry logic.
+        
+        Args:
+            query: The search query string
+            max_results: Maximum number of results to return (default: 5)
+            
+        Returns:
+            List of search results with title, content, URL, and score
+        """
+        # Check cache if enabled
+        cache_key = f"{query}:{max_results}"
+        if self.cache_enabled and cache_key in self._cache:
+            logger.debug(f"Returning cached results for query: {query}")
+            return self._cache[cache_key]
+
+        # Retry logic
+        last_exception = None
+        for attempt in range(self.max_retries + 1):
+            try:
+                logger.debug(f"Search attempt {attempt + 1}/{self.max_retries + 1} for query: {query}")
+                response = await asyncio.wait_for(
+                    asyncio.to_thread(
+                        self._perform_search, 
+                        query=query, 
+                        max_results=max_results
+                    ),
+                    timeout=self.timeout
+                )
+
+                results = []
+                for result in response or []:
+                    results.append({
+                        "title": result.get("title", ""),
+                        "content": result.get("body", ""),
+                        "url": result.get("href", ""),
+                        "score": 0
+                    })
+
+                # Cache results if enabled
+                if self.cache_enabled:
+                    self._cache[cache_key] = results
+                    logger.debug(f"Cached {len(results)} results for query: {query}")
+
+                logger.info(f"Successfully retrieved {len(results)} results for query: {query}")
+                return results
+
+            except asyncio.TimeoutError:
+                last_exception = TimeoutError(f"Search timed out after {self.timeout}s")
+                logger.warning(f"Search timeout (attempt {attempt + 1}/{self.max_retries + 1}): {query}")
+                if attempt < self.max_retries:
+                    await asyncio.sleep(1)  # Brief delay before retry
+                continue
+
+            except (ConnectionError, TimeoutError) as e:
+                last_exception = e
+                logger.warning(f"Network issue (attempt {attempt + 1}/{self.max_retries + 1}): {e}")
+                if attempt < self.max_retries:
+                    await asyncio.sleep(1)
+                continue
 
-            results = []
-            for result in response or []:
-                results.append({
-                    "title": result.get("title", ""),
-                    "content": result.get("body", ""),
-                    "url": result.get("href", ""),
-                    "score": 0
-                })
-            return results
+            except Exception as e:
+                last_exception = e
+                logger.error(f"Search error (attempt {attempt + 1}/{self.max_retries + 1}): {str(e)}")
+                if attempt < self.max_retries:
+                    await asyncio.sleep(1)
+                continue
 
-        except (ConnectionError, TimeoutError) as e:
-            logger.warning("Network issue during DDG search: %s", e)
-            return []
-        except Exception as e:
-            logger.error("DuckDuckGo search failed: %s", str(e))
-            return []
+        # All retries failed
+        logger.error(f"All {self.max_retries + 1} search attempts failed for query: {query}. Last error: {last_exception}")
+        return []

backend/app/core/events/event_bus.py

@@ -20,21 +20,36 @@ def register_handler(self, event_type: Union[EventType, List[EventType]], handle
         if isinstance(event_type, list):
             for et in event_type:
                 self._add_handler(et, handler_func)
+            logger.info(f"Registered handler '{handler_func.__name__}' for event types: {[et.value for et in event_type]}")
         else:
             self._add_handler(event_type, handler_func)
-        pass
+            logger.info(f"Registered handler '{handler_func.__name__}' for event type: {event_type.value}")
+
+        if platform:
+            logger.debug(f"Handler registered with platform filter: {platform.value}")
 
     def _add_handler(self, event_type: EventType, handler_func: callable):
         if event_type not in self.handlers:
             self.handlers[event_type] = []
+            logger.debug(f"Created new handler list for event type: {event_type.value}")
 
+        # Check for duplicate handler registration
+        if handler_func in self.handlers[event_type]:
+            logger.warning(f"Handler '{handler_func.__name__}' already registered for {event_type.value}. Skipping duplicate.")
+            return
+
         self.handlers[event_type].append(handler_func)
-        pass
+        logger.debug(f"Added handler '{handler_func.__name__}' to {event_type.value} (total: {len(self.handlers[event_type])})")
 
     def register_global_handler(self, handler_func):
         """Register a handler that will receive all events"""
+        # Check for duplicate global handler registration
+        if handler_func in self.global_handlers:
+            logger.warning(f"Global handler '{handler_func.__name__}' already registered. Skipping duplicate.")
+            return
+
         self.global_handlers.append(handler_func)
-        pass
+        logger.info(f"Registered global handler: {handler_func.__name__} (total global handlers: {len(self.global_handlers)})")
 
     async def dispatch(self, event: BaseEvent):
         """Dispatch an event to all registered handlers"""
@@ -50,5 +65,4 @@ async def dispatch(self, event: BaseEvent):
                 logger.info(f"Calling handler: {handler.__name__} for event type: {event.event_type}")
                 asyncio.create_task(handler(event))
         else:
-            logger.info(f"No handlers registered for event type {event.event_type}")
-            pass
+            logger.debug(f"No handlers registered for event type {event.event_type}")

backend/integrations/discord/views.py

@@ -1,3 +1,4 @@
+import logging
 import discord
 
 from app.agents.devrel.onboarding.messages import (
@@ -7,6 +8,8 @@
 )
 from app.services.auth.management import get_or_create_user_by_discord
 
+logger = logging.getLogger(__name__)
+
 
 def build_final_handoff_embed() -> discord.Embed:
     """Create the final hand-off embed describing capabilities."""
@@ -29,9 +32,13 @@ async def send_final_handoff_dm(user: discord.abc.User):
     try:
         embed = build_final_handoff_embed()
         await user.send(embed=embed)
-    except Exception:
-        # Fail silently to avoid crashing flows if DMs are closed or similar
-        pass
+        logger.info(f"Successfully sent handoff DM to user {user.id}")
+    except discord.Forbidden:
+        logger.warning(f"Cannot send DM to user {user.id} - DMs are disabled or bot is blocked")
+    except discord.HTTPException as e:
+        logger.error(f"Discord API error sending DM to user {user.id}: {e.status} - {e.text}")
+    except Exception as e:
+        logger.error(f"Unexpected error sending DM to user {user.id}: {type(e).__name__} - {str(e)}")
 
 class OAuthView(discord.ui.View):
     """View with OAuth button."""
@@ -99,8 +106,12 @@ async def check_verified(  # type: ignore[override]
             await send_final_handoff_dm(interaction.user)
             try:
                 await interaction.message.edit(view=self)
-            except Exception:
-                pass
+            except discord.NotFound:
+                logger.warning(f"Message not found when editing onboarding view for user {interaction.user.id}")
+            except discord.HTTPException as e:
+                logger.error(f"Failed to edit onboarding view: {e.status} - {e.text}")
+            except Exception as e:
+                logger.error(f"Unexpected error editing onboarding view: {type(e).__name__} - {str(e)}")
         else:
             await interaction.followup.send(
                 "I still don't see a linked GitHub account. Run `/verify_github` and try again in a moment.",
@@ -115,6 +126,9 @@ async def skip(self, interaction: discord.Interaction, button: discord.ui.Button
             item.disabled = True
         try:
             await interaction.response.edit_message(view=self)
-        except Exception:
-            # If edit fails (e.g., message deleted), ignore
-            pass
+        except discord.NotFound:
+            logger.warning(f"Message not found when editing skip view for user {interaction.user.id}")
+        except discord.HTTPException as e:
+            logger.error(f"Failed to edit skip view: {e.status} - {e.text}")
+        except Exception as e:
+            logger.error(f"Unexpected error editing skip view: {type(e).__name__} - {str(e)}")