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@modelcontextprotocol/ext-apps - v0.2.2
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    Variable McpUiMessageRequestSchemaConst

    McpUiMessageRequestSchema: ZodObject<
        {
            method: ZodLiteral<"ui/message">;
            params: ZodObject<
                {
                    content: ZodArray<
                        ZodUnion<
                            readonly [
                                ZodObject<
                                    {
                                        _meta: ZodOptional<ZodRecord<(...), (...)>>;
                                        annotations: ZodOptional<ZodObject<(...), (...)>>;
                                        text: ZodString;
                                        type: ZodLiteral<"text">;
                                    },
                                    $strip,
                                >,
                                ZodObject<
                                    {
                                        _meta: ZodOptional<ZodRecord<(...), (...)>>;
                                        annotations: ZodOptional<ZodObject<(...), (...)>>;
                                        data: ZodString;
                                        mimeType: ZodString;
                                        type: ZodLiteral<"image">;
                                    },
                                    $strip,
                                >,
                                ZodObject<
                                    {
                                        _meta: ZodOptional<ZodRecord<(...), (...)>>;
                                        annotations: ZodOptional<ZodObject<(...), (...)>>;
                                        data: ZodString;
                                        mimeType: ZodString;
                                        type: ZodLiteral<"audio">;
                                    },
                                    $strip,
                                >,
                                ZodObject<
                                    {
                                        _meta: ZodOptional<ZodObject<(...), (...)>>;
                                        annotations: ZodOptional<ZodObject<(...), (...)>>;
                                        description: ZodOptional<ZodString>;
                                        icons: ZodOptional<ZodArray<(...)>>;
                                        mimeType: ZodOptional<ZodString>;
                                        name: ZodString;
                                        title: ZodOptional<ZodString>;
                                        type: ZodLiteral<"resource_link">;
                                        uri: ZodString;
                                    },
                                    $strip,
                                >,
                                ZodObject<
                                    {
                                        _meta: ZodOptional<ZodRecord<(...), (...)>>;
                                        annotations: ZodOptional<ZodObject<(...), (...)>>;
                                        resource: ZodUnion<readonly [(...), (...)]>;
                                        type: ZodLiteral<"resource">;
                                    },
                                    $strip,
                                >,
                            ],
                        >,
                    >;
                    role: ZodLiteral<"user">;
                },
                $strip,
            >;
        },
        $strip,
    > = ...

    Request to send a message to the host's chat interface.

    app.App.sendMessage for the method that sends this request