Haystack v3.1.0-rc1 发布：Agent 上下文压缩与多项破坏性变更

AI 摘要

Haystack 发布 v3.1.0-rc1 版本，包含多项破坏性变更和新功能。主要变更包括：Agent 的 exit_reason 成为保留状态键、state_schema 属性行为调整、PipelineSnapshot 输入格式变化、不安全组件加载限制、SentenceWindowRetriever 参数校验等。新功能方面，为 Agent 增加了实验性的上下文压缩机制（CompactionHook），并支持 PDF 链接解析。

正文节选

# Release Notes ## v3.1.0-rc1 ### Upgrade Notes - `exit_reason` is now a reserved state key on `Agent`. If you defined a custom `state_schema` key named `exit_reason`, rename it: the Agent now raises a `ValueError` at initialization when a reserved key is redefined. - `Agent.state_schema` now contains the user-provided state schema, exactly as passed to `__init__`. Previously it contained the resolved schema, which also included `messages` and the keys the Agent manages internally (`step_cou

发布时间：2026-08-18 17:09

抓取时间：2026-08-18 17:22

来源机构：deepset