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Bump chat UI to v2 with SDK v6 protocol #4670

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Bump chat UI to v2 with SDK v6 protocol #4670

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008b1d0
feat: thread `sdk_version` through `Agent.to_web()`
bendrucker Mar 15, 2026
fb1ff9a
ui: bump chat UI to v2 with SDK v6 protocol
bendrucker Mar 16, 2026
5a75476
ui: remove sdk_version test, now hardcoded to v6
bendrucker Mar 16, 2026
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3 changes: 2 additions & 1 deletion pydantic_ai_slim/pydantic_ai/ui/_web/api.py
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Original file line number Diff line number Diff line change
Expand Up @@ -152,7 +152,7 @@ async def health(request: Request) -> Response:

async def post_chat(request: Request) -> Response:
"""Handle chat requests via Vercel AI Adapter."""
adapter = await VercelAIAdapter[AgentDepsT, OutputDataT].from_request(request, agent=agent)
adapter = await VercelAIAdapter[AgentDepsT, OutputDataT].from_request(request, agent=agent, sdk_version=6)
extra_data = ChatRequestExtra.model_validate(adapter.run_input.__pydantic_extra__)

if error := validate_request_options(extra_data, model_ids, allowed_tool_ids):
Expand All @@ -163,6 +163,7 @@ async def post_chat(request: Request) -> Response:
streaming_response = await VercelAIAdapter[AgentDepsT, OutputDataT].dispatch_request(
request,
agent=agent,
sdk_version=6,
model=model_ref,
builtin_tools=request_builtin_tools,
deps=deps,
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2 changes: 1 addition & 1 deletion pydantic_ai_slim/pydantic_ai/ui/_web/app.py
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Expand Up @@ -25,7 +25,7 @@
'you can use the `web` optional group — `pip install "pydantic-ai-slim[web]"`'
) from _import_error

CHAT_UI_VERSION = '1.0.0'
CHAT_UI_VERSION = '2.0.0'
DEFAULT_HTML_URL = f'https://cdn.jsdelivr.net/npm/@pydantic/ai-chat-ui@{CHAT_UI_VERSION}/dist/index.html'

AgentDepsT = TypeVar('AgentDepsT')
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