v1.82.0

pydantic/pydantic-aiv1.82.0Apr 15, 2026by DouweM

AI Summary

A bug fix release that addresses compaction chain issues, task leaks in combined toolsets, and updates the FastMCP dependency. It ensures smoother operation of compaction and tool management features.

Key Highlights

Fix OpenAI compaction chain when `openai_previous_response_id='auto'`
Fix orphan-task leak in CombinedToolset and CombinedCapability
Bump fastmcp 2.x → 3.2.0

Full Release Notes

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## 🤖 [Pydantic AI Harness](https://github.com/pydantic/pydantic-ai-harness) is now live with [**Code Mode**](https://github.com/pydantic/pydantic-ai-harness/tree/main/pydantic_ai_harness/code_mode) powered by [Monty](https://github.com/pydantic/monty)!


## What's Changed
### 🐛 Bug Fixes
* Fix OpenAI compaction chain when `openai_previous_response_id='auto'` by @DouweM in https://github.com/pydantic/pydantic-ai/pull/5086
* Fix orphan-task leak in `CombinedToolset` and `CombinedCapability` by @DouweM in https://github.com/pydantic/pydantic-ai/pull/5085
* Lazily compute `ToolDefinition.function_signature` by @DouweM in https://github.com/pydantic/pydantic-ai/pull/5087
### 📦 Dependencies
* chore: bump fastmcp 2.x → 3.2.0 by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/4982

## New Contributors
* @gvdongen made their first contribution in https://github.com/pydantic/pydantic-ai/pull/5041

**Full Changelog**: https://github.com/pydantic/pydantic-ai/compare/v1.81.0...v1.82.0