Matt Van Horn 850c74e4b8 fix(sdk-python): keep LangGraph middleware honest about frontend tool execution ...

The middleware strips FE tool calls so the backend ToolNode only executes
its own calls, then restores them. Restoration now rebuilds the intercepted
calls with synthetic ToolMessage results scoped to the restored model
history (providers that require a result per tool_call stay valid) and
preserves the original AI message's name, additional_kwargs, and
response_metadata. Tracks original_tool_calls in private state so the
original call set is restored exactly.

Closes #4759

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-06-07 09:02:34 -07:00

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