improve monologue (All-Hands-AI#157)

* improve monologue

* Update monologue.py

---------

Co-authored-by: Hesham Haroon <heshamharoon@Heshams-MacBook-Pro.local>

agenthub/langchains_agent/utils/monologue.py

@@ -1,3 +1,4 @@
+
 import agenthub.langchains_agent.utils.json as json
 import agenthub.langchains_agent.utils.llm as llm
 
@@ -7,17 +8,29 @@ def __init__(self, model_name):
         self.model_name = model_name
 
     def add_event(self, t: dict):
+        if not isinstance(t, dict):
+            raise ValueError("Event must be a dictionary")
         self.thoughts.append(t)
 
     def get_thoughts(self):
         return self.thoughts
 
     def get_total_length(self):
-        return sum([len(json.dumps(t)) for t in self.thoughts])
+        total_length = 0
+        for t in self.thoughts:
+            try:
+                total_length += len(json.dumps(t))
+            except TypeError as e:
+                print(f"Error serializing thought: {e}")
+        return total_length
 
     def condense(self):
-        new_thoughts = llm.summarize_monologue(self.thoughts, self.model_name)
-        # self.thoughts = [Event(t['action'], t['args']) for t in new_thoughts]
-        self.thoughts = new_thoughts
-
-
+        try:
+            new_thoughts = llm.summarize_monologue(self.thoughts, self.model_name)
+            # Ensure new_thoughts is not empty or significantly malformed before assigning
+            if not new_thoughts or len(new_thoughts) > len(self.thoughts):
+                raise ValueError("Condensing resulted in invalid state.")
+            self.thoughts = new_thoughts
+        except Exception as e:
+            # Consider logging the error here instead of or in addition to raising an exception
+            raise RuntimeError(f"Error condensing thoughts: {e}")