The _collect_ai_data function returns a 4-tuple (model, usage, content_blocks, response_id) but this code only unpacks 3 values. This will cause a ValueError: too many values to unpack at runtime when iterating over stream events. The unpacking should include response_id as the 4th value.

Also found at:

• sentry_sdk/integrations/anthropic.py:484-493

The new test_stream_messages test is missing an assertion for SPANDATA.GEN_AI_SYSTEM == "anthropic" which is present in the similar test_streaming_create_message test (line 306). This reduces test coverage for the new messages.stream() functionality, as the test doesn't verify that the gen_ai.system attribute is correctly set on the span.

Also found at:

• tests/integrations/anthropic/test_anthropic.py:840-843

The new test_stream_messages test is missing an assertion for SPANDATA.GEN_AI_RESPONSE_ID which is present in the similar test_streaming_create_message test (line 325). This means the test doesn't verify that the response ID is correctly captured from the streaming response, reducing coverage for this important traceability attribute.

The comment on line 2919 incorrectly contains the function name test_stream_messages_input_tokens_include_cache_read_streaming instead of the expected numerical result 2865. This appears to be a copy-paste error during editing. While this doesn't affect runtime behavior, it makes the comment confusing and misleading for developers reading the test.