When package_version("pydantic-ai") returns None (e.g., missing package metadata), the version check short-circuits and the code falls through to register_hooks(hooks), which calls request_context.model — the exact attribute access the PR intends to gate behind >= 1.73. Consider treating a None version as if it is below the minimum safe version, or defaulting are_request_hooks_available to False in that case.

When package_version("pydantic-ai") returns None, the condition PYDANTIC_AI_VERSION is not None and PYDANTIC_AI_VERSION < (1, 73) short-circuits to False, so _patch_graph_nodes() is skipped and the code falls through to use Hooks. On pydantic-ai 1.71–1.72 (which has Hooks but not ModelRequestContext.model), this still triggers the AttributeError this PR is meant to fix.

Also found at:

• sentry_sdk/integrations/pydantic_ai/__init__.py:4