Hashbrown 0.7.0

🧭 Migrating from 0.6

0.7 moves Hashbrown to AG-UI 1.0. Upgrade your own @ag-ui/* packages to 1.x together with Hashbrown, import AG-UI validators from @ag-ui/core/schemas, and replace any THINKING_* events your server or custom transport emits with REASONING_*. Read the step-by-step guide for React or Angular.

⚠️ Breaking Changes

• move to AG-UI 1.0: @ag-ui/core, @ag-ui/client and @ag-ui/encoder go from 0.0.59 to 1.0.2, so the AG-UI types in Hashbrown's public API (AGUIEvent, RunAgentInput and others) resolve to AG-UI 1.0 (#629)
• THINKING_* events are no longer accepted; emit REASONING_* instead (#629)
• the OpenAI, Azure, Anthropic, Google, Bedrock and Ollama adapters reject tool results whose content is an array of content parts, which AG-UI 1.0 allows; send text tool results (#629)

🚀 Features

• core: add createUiJsonSchema and UiComponentDefinition so an agent Hashbrown doesn't run (CopilotKit, LangGraph, your own server) can follow a UI kit's schema, built from the same component definitions as the browser's kit (#626)

🔥 Performance

• core: publish one module per source file so bundlers can drop unused code; a renderer that only uses useUiKit and useJsonParser no longer pulls in the chat runtime, AG-UI or zod, and a CopilotKit renderer bundle falls from 244 KB to 117 KB minified (#627)

🩹 Fixes

• a TEXT_MESSAGE_START event without a role is treated as an assistant message, as the AG-UI spec says; AG-UI 1.0 no longer fills the role in (#629)

📖 Documentation

• rewrite the CopilotKit recipe, add a UI kit section on agents Hashbrown doesn't run, and document passing arrays, objects and numbers into prompt examples with ${} (#628)
• align the package READMEs with the new website positioning (#593)

❤️ Thank You

• Brian Love @blove