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refactor: Add runtime type validation for Agent 'instructions'Update agent.py #1342

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refactor: Add runtime type validation for Agent 'instructions'Update agent.py #1342

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8 changes: 8 additions & 0 deletions src/agents/agent.py
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Original file line number Diff line number Diff line change
Expand Up @@ -221,6 +221,14 @@ class Agent(AgentBase, Generic[TContext]):
"""Whether to reset the tool choice to the default value after a tool has been called. Defaults
to True. This ensures that the agent doesn't enter an infinite loop of tool usage."""

def __post_init__(self):
if self.instructions is not None and not (
isinstance(self.instructions, str) or callable(self.instructions)
):
raise TypeError(
f"The 'instructions' must be a string or a callable, but received {type(self.instructions).__name__}."
)

def clone(self, **kwargs: Any) -> Agent[TContext]:
"""Make a copy of the agent, with the given arguments changed. For example, you could do:
```
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