ACP v2 TypeScript SDK — UNSTABLE DRAFT - v2.0.0
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    Type Alias SessionSystemPromptCapabilitiesExperimental

    UNSTABLE

    This capability is not part of the spec yet, and may be removed or changed at any point.

    Capabilities for client-provided system prompts.

    Supplying {} means the agent supports systemPrompt on session lifecycle requests in append mode.

    type SessionSystemPromptCapabilities = {
        mode?: SessionSystemPromptModeCapabilities | null;
        _meta?: { [key: string]: unknown } | null;
    }
    Index
    mode? _meta?
    mode?: SessionSystemPromptModeCapabilities | null

    Delivery modes the agent supports in addition to append.

    Optional. Omitted or null both mean the agent supports only append.

    Optional_meta

    _meta?: { [key: string]: unknown } | null

    The _meta property is reserved by ACP to allow clients and agents to attach additional metadata to their interactions. Implementations MUST NOT make assumptions about values at these keys.

    See protocol docs: Extensibility

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