* Recorded instance of streaming tool response variant "a".
This is the typical response, where "arguments":"" arrives
first in the stream, followed by "arguments":"{}"
The response data is a real capture from the OpenRouter API,
however some request and header data may be from other test fixtures.
* Recorded instance of streaming tool response variant "b".
This is a streaming response where the first arguments
you get is a fully formed "arguments":"{}"
The response data is a real capture from the OpenRouter API,
however some request and header data may be from other test fixtures.
* Test cases for streaming tool responses.
Note that the replays are marked as "read-only", as they are variants
seen in the wild where the streaming tool call argument fragments
arrive in a specific order.
* Fix streaming tool response variant "b", where "arguments":"{}" is what arrives first.
The previous code erroneously caused the first "arguments" to be duplicated,
by using "+=" even when being initially set.
This went unnoticed as many models stream "arguments":"" first.
When a more fully formed "arguments" fragment arrived first, it was causing
"Error: Extra data: line 1 column 3 (char 2)"
* Recorded instance of streaming tool response variant "c".
This was failing with "Error: unsupported operand type(s) for +=: 'NoneType' and 'str'"
The response data is a real capture from the OpenRouter API,
however some request and header data may be from other test fixtures.
* Test case for streaming tool response variant "c".
* Fix streaming tool response variant "c".
However, I'm not sure why arguments was initially not present or seen as None.
