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replace AG-UI thinking with reasoning events #4871

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replace AG-UI thinking with reasoning events #4871

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24 changes: 12 additions & 12 deletions pydantic_ai_slim/pydantic_ai/ui/ag_ui/_event_stream.py
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Original file line number Diff line number Diff line change
Expand Up @@ -35,18 +35,18 @@
from ag_ui.core import (
BaseEvent,
EventType,
ReasoningEndEvent,
ReasoningStartEvent,
ReasoningTextMessageContentEvent,
ReasoningTextMessageEndEvent,
ReasoningTextMessageStartEvent,
RunAgentInput,
RunErrorEvent,
RunFinishedEvent,
RunStartedEvent,
TextMessageContentEvent,
TextMessageEndEvent,
TextMessageStartEvent,
ThinkingEndEvent,
ThinkingStartEvent,
ThinkingTextMessageContentEvent,
ThinkingTextMessageEndEvent,
ThinkingTextMessageStartEvent,
ToolCallArgsEvent,
ToolCallEndEvent,
ToolCallResultEvent,
Expand Down Expand Up @@ -148,32 +148,32 @@ async def handle_thinking_start(
self, part: ThinkingPart, follows_thinking: bool = False
) -> AsyncIterator[BaseEvent]:
if not follows_thinking:
yield ThinkingStartEvent(type=EventType.THINKING_START)
yield ReasoningStartEvent(type=EventType.REASONING_START)

if part.content:
yield ThinkingTextMessageStartEvent(type=EventType.THINKING_TEXT_MESSAGE_START)
yield ThinkingTextMessageContentEvent(type=EventType.THINKING_TEXT_MESSAGE_CONTENT, delta=part.content)
yield ReasoningTextMessageStartEvent(type=EventType.REASONING_TEXT_MESSAGE_START)
yield ReasoningTextMessageContentEvent(type=EventType.REASONING_TEXT_MESSAGE_CONTENT, delta=part.content)
self._thinking_text = True

async def handle_thinking_delta(self, delta: ThinkingPartDelta) -> AsyncIterator[BaseEvent]:
if not delta.content_delta:
return # pragma: no cover

if not self._thinking_text:
yield ThinkingTextMessageStartEvent(type=EventType.THINKING_TEXT_MESSAGE_START)
yield ReasoningTextMessageStartEvent(type=EventType.REASONING_TEXT_MESSAGE_START)
self._thinking_text = True

yield ThinkingTextMessageContentEvent(type=EventType.THINKING_TEXT_MESSAGE_CONTENT, delta=delta.content_delta)
yield ReasoningTextMessageContentEvent(type=EventType.REASONING_TEXT_MESSAGE_CONTENT, delta=delta.content_delta)

async def handle_thinking_end(
self, part: ThinkingPart, followed_by_thinking: bool = False
) -> AsyncIterator[BaseEvent]:
if self._thinking_text:
yield ThinkingTextMessageEndEvent(type=EventType.THINKING_TEXT_MESSAGE_END)
yield ReasoningTextMessageEndEvent(type=EventType.REASONING_TEXT_MESSAGE_END)
self._thinking_text = False

if not followed_by_thinking:
yield ThinkingEndEvent(type=EventType.THINKING_END)
yield ReasoningEndEvent(type=EventType.REASONING_END)

def handle_tool_call_start(self, part: ToolCallPart | BuiltinToolCallPart) -> AsyncIterator[BaseEvent]:
return self._handle_tool_call_start(part)
Expand Down
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