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fix(agent): reapply provider headers after model switch (#61099) #61347

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fix(agent): reapply provider headers after model switch (#61099) #61347

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5 changes: 5 additions & 0 deletions agent/agent_runtime_helpers.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1925,6 +1925,11 @@ def switch_model(agent, new_model, new_provider, api_key='', base_url='', api_mo
_sm_timeout = get_provider_request_timeout(agent.provider, agent.model)
if _sm_timeout is not None:
agent._client_kwargs["timeout"] = _sm_timeout
# Reapply provider-specific headers (e.g. OpenRouter HTTP-Referer,
# X-Title) that were lost when _client_kwargs was rebuilt from
# scratch. Without this, model switches clear attribution headers
# and OpenRouter logs show "Unknown" for subsequent requests.
agent._apply_client_headers_for_base_url(effective_base)
agent.client = agent._create_openai_client(
dict(agent._client_kwargs),
reason="switch_model",
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