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fix(messages): copy metadata dict to prevent raw_request leak to Anthropic API

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LiteLLM's logging layer injects raw_request into the metadata dict via
a shared reference with litellm_params. Without a copy, this extra key
reaches the Anthropic API and triggers "Extra inputs are not permitted".

PR #24661 fixed the same issue for the chat/completions path by
stripping non-user_id keys. Here we use a shallow copy to break the
shared reference before the request is sent.
This commit is contained in:
Vigilans 2026-04-16 21:27:15 +08:00
parent 26fcbc93e5
commit daeb9292a4
1 changed files with 6 additions and 0 deletions
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6
litellm/llms/anthropic/experimental_pass_through/messages/transformation.py
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@ -222,6 +222,12 @@ class AnthropicMessagesConfig(BaseAnthropicMessagesConfig):
optional_params=anthropic_messages_optional_request_params,
)
# Break metadata shared reference with litellm_params so that
# pre_call's raw_request injection doesn't leak into the API request.
metadata = anthropic_messages_optional_request_params.get("metadata")
if isinstance(metadata, dict):
anthropic_messages_optional_request_params["metadata"] = dict(metadata)
# Filter out x-anthropic-billing-header from system messages
system_param = anthropic_messages_optional_request_params.get("system")
if system_param is not None: