Cancel built on system_prompt

[LonglongSang]

I see the model log, there always have one system prompt:
{ "type": "text", "text": "You are a Claude agent, built on Anthropic's Claude Agent SDK.", "cache_control": { "type": "ephemeral" } }
then follow my add system prompt

{ "type": "text", "text": "you are a python expert", "cache_control": { "type": "ephemeral" } }

can I cancel it

[qing-ant]

Closing — the default system prompt is part of the SDK's design. You can override it by passing a custom system_prompt string in ClaudeAgentOptions. If you need more granular control over system prompt behavior, please open a new issue with specific use cases.