google-genai-kotlin/com.google.genai.kotlin.types/LiveClientContextUpdate/systemInstruction

systemInstruction

val systemInstruction: Content? = null

Updated system instruction for the model. If set, overrides BidiGenerateContentSetup.system_instruction. The system instructions are part of the model preamble, so updating them invalidates the prefix cache. Clients should only update this field when strictly necessary as it might have a performance impact on the model generation.