🚀 Pydantic AI V2 Beta 3 is here!

For more information on Pydantic AI V2, see the release notes for v2.0.0b1 and the Upgrade Guide.

Beta 3 adds no new breaking or v2-specific changes, but pulls in these changes from v1.102.0:

What's Changed

Expand IPv6 transition-form handling in URL validation by @DouweM in #5596
- Security advisory: SSRF cloud-metadata blocklist bypass via additional IPv6 transition forms GHSA-cg7w-rg45-pc59
- You are affected only if your application explicitly opts a FileUrl into force_download='allow-local' on a URL that is, or could be, influenced by untrusted input, AND runs on a NAT64- or ISATAP-configured network (e.g. some IPv6-only or dual-stack-with-NAT64 Kubernetes setups).
- You are not affected if you run on a standard dual-stack cloud VM or container, which does not route these forms in practice.
- You are not affected if you use any of the bundled integrations to ingest user input: Agent.to_web / clai web; VercelAIAdapter; AGUIAdapter / Agent.to_ag_ui

Don't auto-promote strict=None tools to strict mode with Bedrock, and skip strict field when botocore is too old by @shailendher in #5580
fix(bedrock): Disable Opus 4.7 native structured output by @cosmopolitan033 in #5582
fix(instrumentation): Prevent false positive variable_instructions span attribute by @madanlalit in #5487
Fix: VercelAIAdapter now accepts providerExecuted / title on dynamic-tool message parts by @he-yufeng in #5474
Normalize trailing dot and case in WebFetchTool domain matching by @DouweM in #5592

Full Changelog: v2.0.0b2...v2.0.0b3