feat: add debug logging for silently caught errors (#809)

Co-authored-by: Letta <noreply@letta.com>

src/cli/App.tsx

@@ -386,8 +386,8 @@ function sendDesktopNotification(
   // Send terminal bell for native notification
   process.stdout.write("\x07");
   // Run Notification hooks (fire-and-forget, don't block)
-  runNotificationHooks(message, level).catch(() => {
-    // Silently ignore hook errors
+  runNotificationHooks(message, level).catch((error) => {
+    debugLog("hooks", "Notification hook error", error);
   });
 }
 

src/cli/helpers/accumulator.ts

@@ -7,6 +7,7 @@
 import type { LettaStreamingResponse } from "@letta-ai/letta-client/resources/agents/messages";
 import { INTERRUPTED_BY_USER } from "../../constants";
 import { runPostToolUseHooks, runPreToolUseHooks } from "../../hooks";
+import { debugLog } from "../../utils/debug";
 import { extractCompactionSummary } from "./backfill";
 import { findLastSafeSplitPoint } from "./markdownSplit";
 import { isShellTool } from "./toolNameMapping";
@@ -652,7 +653,9 @@ export function onChunk(b: Buffers, chunk: LettaStreamingResponse) {
             toolCallId,
             undefined,
             b.agentId,
-          ).catch(() => {});
+          ).catch((error) => {
+            debugLog("hooks", "PreToolUse hook error (accumulator)", error);
+          });
         }
       }
 
@@ -748,7 +751,9 @@ export function onChunk(b: Buffers, chunk: LettaStreamingResponse) {
               b.agentId,
               precedingReasoning,
               precedingAssistantMessage,
-            ).catch(() => {});
+            ).catch((error) => {
+              debugLog("hooks", "PostToolUse hook error (accumulator)", error);
+            });
 
             b.serverToolCalls.delete(toolCallId);
           }