PydanticAI v2.31.0 发布：UIEventStream 增强与多项修复

AI 摘要

PydanticAI 发布 v2.31.0 版本，新增功能允许 UIEventStream 无需 run_input 构建，并为 AGUIEventStream 提供独立的 thread_id/run_id。同时修复了 FallbackModel 失败跨度归属错误以及 Temporal 工作流沙箱中 openai 传递问题。

正文节选

<!-- Release notes generated using configuration in .github/release.yml at main --> ## What's Changed ### 🚀 Features * Allow a `UIEventStream` to be built without a `run_input`, and give `AGUIEventStream` its own `thread_id`/`run_id` by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/7292 ### 🐛 Bug Fixes * Attribute failed `FallbackModel` spans to the failing model, not the `fallback:` wrapper by @strawgate in https://github.com/pydantic/pydantic-ai/pull/7018 * Pass `openai` through

发布时间：2026-08-15 11:04

抓取时间：2026-08-15 11:30

来源机构：Pydantic