pydantic-ai 1.78.0

v1.78.0 (2026-04-07)

on Python PyPI

What's Changed

🚀 Features

• Add cached token span attributes per OTel spec by @alexmojaki in #5013
• feat: add return_schema and function_signature to ToolDefinition by @adtyavrdhn in #4964
• feat: add SetToolMetadata capability by @DouweM in #4964

New Contributors

• @Ricardo-M-L made their first contribution in #4968
• @chernistry made their first contribution in #5005
• @vladdoster made their first contribution in #4620
• @edmcman made their first contribution in #4584
• @drPod made their first contribution in #4809
• @1Ninad made their first contribution in #4945

Full Changelog: v1.77.0...v1.78.0