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fix: continue tool runner loop on server_tool_use with pause_turn #1229

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fix: continue tool runner loop on server_tool_use with pause_turn #1229

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30 changes: 22 additions & 8 deletions src/anthropic/lib/tools/_beta_runner.py
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Original file line number Diff line number Diff line change
Expand Up @@ -261,10 +261,17 @@ def __run__(self) -> Iterator[RunnerItemT]:
if not self._check_and_compact():
response = self.generate_tool_call_response()
if response is None:
log.debug("Tool call was not requested, exiting from tool runner loop.")
return

if not self._messages_modified:
# When stop_reason is "pause_turn", the server is still processing
# server tool use blocks (e.g. web_search, web_fetch). Continue the
# loop so the API can resolve them on the next iteration.
if message.stop_reason == "pause_turn":
log.debug("Server tool use in progress (pause_turn), continuing loop.")
if not self._messages_modified:
self.append_messages(message)
else:
log.debug("Tool call was not requested, exiting from tool runner loop.")
return
elif not self._messages_modified:
self.append_messages(message, response)

self._messages_modified = False
Expand Down Expand Up @@ -521,10 +528,17 @@ async def __run__(self) -> AsyncIterator[RunnerItemT]:
if not await self._check_and_compact():
response = await self.generate_tool_call_response()
if response is None:
log.debug("Tool call was not requested, exiting from tool runner loop.")
return

if not self._messages_modified:
# When stop_reason is "pause_turn", the server is still processing
# server tool use blocks (e.g. web_search, web_fetch). Continue the
# loop so the API can resolve them on the next iteration.
if message.stop_reason == "pause_turn":
log.debug("Server tool use in progress (pause_turn), continuing loop.")
if not self._messages_modified:
self.append_messages(message)
else:
log.debug("Tool call was not requested, exiting from tool runner loop.")
return
elif not self._messages_modified:
self.append_messages(message, response)

self._messages_modified = False
Expand Down