The _sentry_span is stored in ctx.metadata which, according to the docstring (line 126-127), is initialized from Agent.metadata as a shared reference. If multiple concurrent run() calls share the same metadata dictionary, the _sentry_span key could be overwritten by concurrent requests, causing spans to be mismatched between on_request and on_response/on_error handlers. This could result in spans being closed with the wrong response data or orphaned spans.

The on_response hook calls span.__exit__(None, None, None) at line 72 without any exception handling. If the span's __enter__() had failed (after being stored in metadata at line 51), the __exit__() call would raise an AttributeError because _context_manager_state was never set. Unlike the on_error hook which wraps the __exit__() call with capture_internal_exceptions(), on_response lacks this protection. This could cause internal SDK errors to propagate to user code.

In test_context_cleanup_on_error, the agent is created at line 1190 (test_agent = get_test_agent()) BEFORE sentry_init() is called at lines 1198-1201. The PydanticAIIntegration patches Agent.__init__ during setup, so agents created before sentry_init() won't have the Sentry hooks registered. This differs from other tests like test_context_cleanup_after_run where sentry_init() is correctly called first. The test may pass but won't actually test the integration's cleanup behavior.