FrameworksOfficial

A2UI Agent SDK 0.9 separates integrations and revises streaming

The October 17 release adds cross-catalog references, requires core 0.4 and separates ADK/A2A integrations.

Why it matters

Catalog composition and output parsing need explicit migration boundaries.

A closer look

Unified parse_chunk replaces older streaming parsers; invalid components report errors earlier and truncated URLs are not healed.

Who this is for

A2UI Python integration teams

Original sources

Revisions & corrections (1)

— Dated official SDK release verified; distinguish SDK publication from pending split integration packages, no installation claim.

Related events

Frameworks

assistant-ui's October 28 release tightens prompt review, tool-result ownership and configuration writes

assistant-ui released a coordinated package set on October 28. Generative Frame 0.0.9 fills the composer with widget and MCP App prompts for review before sending; assistant-stream 0.3.55 fixes stale model content surviving a later tool response and pending results moving when tool-call IDs are reused; the CLI also narrows configuration paths and plan-revision boundaries.

Protocols

A2UI separates model inference syntax from the wire protocol with Express and controlled decisions

On October 27, the Google A2UI team introduced swappable inference formats: a model can emit compact A2UI Express and let the SDK deterministically compile it against a component catalog into standard A2UI messages, while fixed-shape screens can use decision models to select predefined layouts.