pydantic/pydantic-ai v1.21.0

v1.21.0 (2025-11-20)

on GitHub

What's Changed

• Feature: MCP client Resources support by @fennb in #3024
• Expose MCP server instructions in MCPServer.instructions property by @mochow13 in #3431
• Add BinaryContent.from_path convenience method by @dsfaccini in #3482
• Enforce message history starts with user message by @Pavanmanikanta98 in #3440
• Always strip Markdown fences from structured output by @DouweM in #3475
• Fix Gemini nested tool argument schemas by removing title from $defs by @conradlee in #3487
• Fix issue with Gemini and Prefect by removing unused GoogleModel._url by @DouweM in #3499

New Contributors

• @Pavanmanikanta98 made their first contribution in #3440
• @fennb made their first contribution in #3024

Full Changelog: v1.20.0...v1.21.0