Agent Client Protocol - v1.8.0
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    Type Alias MessageMcpNotificationExperimental

    UNSTABLE

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

    Notification parameters for mcp/message.

    Sent by the provider to the consumer for an active request (including subscription acknowledgements and updates); the outer envelope has no id.

    type MessageMcpNotification = {
        serverId: McpServerAcpId;
        requestId: McpRequestId;
        method: string;
        params?: { [key: string]: unknown } | null;
        _meta?: { [key: string]: unknown } | null;
    }
    Index
    serverId requestId method params? _meta?
    serverId: McpServerAcpId

    The declared ACP MCP server handling the associated request.

    requestId: McpRequestId

    The identifier of the active inner MCP request.

    method: string

    The inner MCP method name.

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

    Optional inner MCP params.

    If omitted or set to null, the inner MCP message has no params.

    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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