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fix(anthropic): strip trailing whitespace from final assistant message (#35072)

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This commit is contained in:
Mohan Kumar S
2026-02-08 21:38:59 +05:30
committed by GitHub
parent a027f46403
commit 4276d31cb5
2 changed files with 31 additions and 0 deletions
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11
libs/partners/anthropic/langchain_anthropic/chat_models.py
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@@ -643,6 +643,17 @@ def _format_messages(
_lc_tool_calls_to_anthropic_tool_use_blocks(missing_tool_calls),
)
if role == "assistant" and _i == len(merged_messages) - 1:
if isinstance(content, str):
content = content.rstrip()
elif (
isinstance(content, list)
and content
and isinstance(content[-1], dict)
and content[-1].get("type") == "text"
):
content[-1]["text"] = content[-1]["text"].rstrip()
if not content and role == "assistant" and _i < len(merged_messages) - 1:
# anthropic.BadRequestError: Error code: 400: all messages must have
# non-empty content except for the optional final assistant message