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Giles Odigwe dc27740f1a Python: Fix streaming path to emit mcp_server_tool_result on output_item.done instead of output_item.added (#4821)
* Fix streaming path to deliver mcp_server_tool_result content (#4814)

Remove premature mcp_server_tool_result emission from the
response.output_item.added/mcp_call handler — at that point the MCP
server has not yet responded and output is always None.

Add a handler for response.mcp_call.completed that emits
mcp_server_tool_result with the actual tool output, matching the
non-streaming path behavior.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix streaming path to deliver mcp_server_tool_result content (#4814)

Stop eagerly emitting mcp_server_tool_result on response.output_item.added
(when output is always None). Instead, handle response.output_item.done for
mcp_call items, which carries the full McpCall with populated output.

This matches the non-streaming path which guards with 'if item.output is not
None' before emitting the result.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix test docstring to match actual implementation event name

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address review: call_id fallback and raw_representation consistency (#4814)

- Add call_id fallback in response.output_item.done mcp_call handler to
  match the output_item.added handler pattern
- Use done_item instead of event for raw_representation to keep
  consistent with other output_item branches and non-streaming path
- Add test for call_id fallback when id attribute is missing
- Add raw_representation assertions to existing done handler tests

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address review: call_id fallback for non-streaming path and test coverage (#4814)

- Apply defensive call_id fallback (getattr with id/call_id/empty) to
  non-streaming mcp_call path for consistency with streaming path
- Add raw_representation assertion to call_id fallback test
- Add test for empty-string fallback when neither id nor call_id exist

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <copilot@github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
dc27740f1a · 2026-03-26 02:09:22 +00:00
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