FEAT add supports_system_prompt flag#1563
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hannahwestra25 merged 2 commits intomicrosoft:mainfrom Apr 3, 2026
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Description
Add supports_system_prompt to the TargetCapabilities. This allows us to specify when a target can support system prompts (ie it can accept a privileged instruction (separate from user input) that is persisted and replayed as part of the conversation across turns). As with other TargetCapabilities, by default we set it to false and that default is overridden in the chat targets (note: PromptChatTarget will soon be deprecated and supports_system_prompt as well as other chat target capabilities will need to be overridden explicitly by the child classes)
Tests and Documentation
updated tests, currently running notebooks