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4 changes: 4 additions & 0 deletions agent/core/conversation.py
Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,10 @@ class Message:
name: Optional[str] = None # tool name for tool messages
timestamp: float = field(default_factory=time.time)

def __post_init__(self):
if not self.content or (isinstance(self.content, str) and not self.content.strip()):
raise ValueError(f"Message content cannot be None or empty (role={self.role})")

def to_dict(self) -> dict:
d: dict[str, Any] = {"role": self.role, "content": self.content}
if self.tool_calls:
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