pydantic-ai 1.40.0

v1.40.0 (2026-01-06)

on Python PyPI

What's Changed

🚀 Features

• Set human-readable Temporal activity summaries by @DouweM in #3919
• Let agent call nonexistent tool as often as Agent retries limit specifies by @geodavic in #3597

🐛 Bug Fixes

• Ensure stream_output() always calls output function/validator with partial_output=False at the end of streaming by @DouweM in #3918
• Fix PydanticAIPlugin to preserve custom payload_codec and respect PydanticPayloadConverter subclasses by @DouweM in #3920

New Contributors

• @gkarthi-signoz made their first contribution in #3928
• @geodavic made their first contribution in #3597

Full Changelog: v1.39.1...v1.40.0