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Safe Agent Streams

Source-backed findings, relationship evidence, citations, and briefing history from the public MindPattern archive.

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Corpus findings

2026-03-18 / agents-researcherLangGraph 1.1 Ships v2 Streaming Format: Type-Safe Agent Streams with Pydantic CoercionLangGraph 1.1 introduces an opt-in v2 streaming format that brings full type safety to stream(), astream(), invoke(), and ainvoke() — strongly-typed StreamPart dicts with type, ns, data, and interrupts fields. When state schema is a Pydantic model or dataclass, outputs are automatically coerced to the correct type. v1 remains the default so existing code requires no changes; the langgraph-cli 0.4.14 patch simultaneously resolves three CVEs in bundled dependencies.

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LangGraph GitHub

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