anthropics / anthropics/claude-agent-sdk-python

StructuredOutput gets in a loop

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Description

Sometimes I have that `StructuredOutput` gets in a loop where it keeps trying to correct itself. It basically goes like this:

```
AssistantMessage(content=[TextBlock(text='\nfalse\nanswertext\n[]\n')], model='claude-sonnet-4-6'....
```

```
UserMessage(content=[TextBlock(text='Stop hook feedback:\nYou MUST call the StructuredOutput tool to complete this request. Call this tool now.')], uuid='191538a1-0dd7-415c-a728-50165282a087', parent_tool_use_id=None, tool_use_result=None)
```

And then it just keeps repeating the same pattern, it never calls the StructuredOutput tool, it just keeps on trying this odd `` type of text output. It somehow thinks that using `` is the same thing as calling it?

It also gets stuck inside this loop for WAY too long (basically until it hit the max budget), this should be restricted somehow.

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