pydantic-ai 1.86.0

v1.86.0 (2026-04-22)

on Python PyPI

What's Changed

🚀 Features

• feat(ui): add UIAdapter.manage_system_prompt + ReinjectSystemPrompt capability by @dsfaccini in #4087

🐛 Bug Fixes

• fix(vercel-ai): allow regenerate requests without messageId by @MukundaKatta in #5156
• Handle dict reasoning_content from Gemini 2.5 models by @JulieLiu99 in #5155

New Contributors

• @MukundaKatta made their first contribution in #5156
• @JulieLiu99 made their first contribution in #5155

Full Changelog: v1.85.1...v1.86.0