@modelcontextprotocol/sdk
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    Variable InitializeRequestSchemaConst

    InitializeRequestSchema: ZodObject<
        extendShape<
            {
                method: ZodString;
                params: ZodOptional<
                    ZodObject<
                        {
                            _meta: ZodOptional<
                                ZodObject<
                                    { progressToken: ZodOptional<ZodUnion<(...)>> },
                                    "passthrough",
                                    ZodTypeAny,
                                    objectOutputType<
                                        { progressToken: ZodOptional<(...)> },
                                        ZodTypeAny,
                                        "passthrough",
                                    >,
                                    objectInputType<
                                        { progressToken: ZodOptional<(...)> },
                                        ZodTypeAny,
                                        "passthrough",
                                    >,
                                >,
                            >;
                        },
                        "passthrough",
                        ZodTypeAny,
                        objectOutputType<
                            {
                                _meta: ZodOptional<
                                    ZodObject<
                                        { progressToken: ZodOptional<(...)> },
                                        "passthrough",
                                        ZodTypeAny,
                                        objectOutputType<{ progressToken: ... }, ZodTypeAny, "passthrough">,
                                        objectInputType<{ progressToken: ... }, ZodTypeAny, "passthrough">,
                                    >,
                                >;
                            },
                            ZodTypeAny,
                            "passthrough",
                        >,
                        objectInputType<
                            {
                                _meta: ZodOptional<
                                    ZodObject<
                                        { progressToken: ZodOptional<(...)> },
                                        "passthrough",
                                        ZodTypeAny,
                                        objectOutputType<{ progressToken: ... }, ZodTypeAny, "passthrough">,
                                        objectInputType<{ progressToken: ... }, ZodTypeAny, "passthrough">,
                                    >,
                                >;
                            },
                            ZodTypeAny,
                            "passthrough",
                        >,
                    >,
                >;
            },
            {
                method: ZodLiteral<"initialize">;
                params: ZodObject<
                    extendShape<
                        {
                            _meta: ZodOptional<
                                ZodObject<
                                    { progressToken: ZodOptional<ZodUnion<(...)>> },
                                    "passthrough",
                                    ZodTypeAny,
                                    objectOutputType<
                                        { progressToken: ZodOptional<(...)> },
                                        ZodTypeAny,
                                        "passthrough",
                                    >,
                                    objectInputType<
                                        { progressToken: ZodOptional<(...)> },
                                        ZodTypeAny,
                                        "passthrough",
                                    >,
                                >,
                            >;
                        },
                        {
                            capabilities: ZodObject<
                                {
                                    elicitation: ZodOptional<
                                        ZodObject<
                                            {},
                                            "passthrough",
                                            ZodTypeAny,
                                            objectOutputType<(...), (...), (...)>,
                                            objectInputType<(...), (...), (...)>,
                                        >,
                                    >;
                                    experimental: ZodOptional<
                                        ZodObject<
                                            {},
                                            "passthrough",
                                            ZodTypeAny,
                                            objectOutputType<(...), (...), (...)>,
                                            objectInputType<(...), (...), (...)>,
                                        >,
                                    >;
                                    roots: ZodOptional<
                                        ZodObject<
                                            { listChanged: ... },
                                            "passthrough",
                                            ZodTypeAny,
                                            objectOutputType<(...), (...), (...)>,
                                            objectInputType<(...), (...), (...)>,
                                        >,
                                    >;
                                    sampling: ZodOptional<
                                        ZodObject<
                                            {},
                                            "passthrough",
                                            ZodTypeAny,
                                            objectOutputType<(...), (...), (...)>,
                                            objectInputType<(...), (...), (...)>,
                                        >,
                                    >;
                                },
                                "passthrough",
                                ZodTypeAny,
                                objectOutputType<
                                    {
                                        elicitation: ZodOptional<
                                            ZodObject<(...), (...), (...), (...), (...)>,
                                        >;
                                        experimental: ZodOptional<
                                            ZodObject<(...), (...), (...), (...), (...)>,
                                        >;
                                        roots: ZodOptional<ZodObject<(...), (...), (...), (...), (...)>>;
                                        sampling: ZodOptional<ZodObject<(...), (...), (...), (...), (...)>>;
                                    },
                                    ZodTypeAny,
                                    "passthrough",
                                >,
                                objectInputType<
                                    {
                                        elicitation: ZodOptional<
                                            ZodObject<(...), (...), (...), (...), (...)>,
                                        >;
                                        experimental: ZodOptional<
                                            ZodObject<(...), (...), (...), (...), (...)>,
                                        >;
                                        roots: ZodOptional<ZodObject<(...), (...), (...), (...), (...)>>;
                                        sampling: ZodOptional<ZodObject<(...), (...), (...), (...), (...)>>;
                                    },
                                    ZodTypeAny,
                                    "passthrough",
                                >,
                            >;
                            clientInfo: ZodObject<
                                extendShape<
                                    extendShape<
                                        { name: ZodString; title: ZodOptional<(...)> },
                                        { version: ZodString; websiteUrl: ZodOptional<(...)> },
                                    >,
                                    { icons: ZodOptional<ZodArray<(...), (...)>> },
                                >,
                                "passthrough",
                                ZodTypeAny,
                                objectOutputType<
                                    extendShape<
                                        extendShape<
                                            { name: ...; title: ... },
                                            { version: ...; websiteUrl: ... },
                                        >,
                                        { icons: ZodOptional<(...)> },
                                    >,
                                    ZodTypeAny,
                                    "passthrough",
                                >,
                                objectInputType<
                                    extendShape<
                                        extendShape<
                                            { name: ...; title: ... },
                                            { version: ...; websiteUrl: ... },
                                        >,
                                        { icons: ZodOptional<(...)> },
                                    >,
                                    ZodTypeAny,
                                    "passthrough",
                                >,
                            >;
                            protocolVersion: ZodString;
                        },
                    >,
                    "passthrough",
                    ZodTypeAny,
                    objectOutputType<
                        extendShape<
                            {
                                _meta: ZodOptional<
                                    ZodObject<
                                        { progressToken: ZodOptional<(...)> },
                                        "passthrough",
                                        ZodTypeAny,
                                        objectOutputType<{ progressToken: ... }, ZodTypeAny, "passthrough">,
                                        objectInputType<{ progressToken: ... }, ZodTypeAny, "passthrough">,
                                    >,
                                >;
                            },
                            {
                                capabilities: ZodObject<
                                    {
                                        elicitation: ZodOptional<
                                            ZodObject<(...), (...), (...), (...), (...)>,
                                        >;
                                        experimental: ZodOptional<
                                            ZodObject<(...), (...), (...), (...), (...)>,
                                        >;
                                        roots: ZodOptional<ZodObject<(...), (...), (...), (...), (...)>>;
                                        sampling: ZodOptional<ZodObject<(...), (...), (...), (...), (...)>>;
                                    },
                                    "passthrough",
                                    ZodTypeAny,
                                    objectOutputType<
                                        {
                                            elicitation: ZodOptional<(...)>;
                                            experimental: ZodOptional<(...)>;
                                            roots: ZodOptional<(...)>;
                                            sampling: ZodOptional<(...)>;
                                        },
                                        ZodTypeAny,
                                        "passthrough",
                                    >,
                                    objectInputType<
                                        {
                                            elicitation: ZodOptional<(...)>;
                                            experimental: ZodOptional<(...)>;
                                            roots: ZodOptional<(...)>;
                                            sampling: ZodOptional<(...)>;
                                        },
                                        ZodTypeAny,
                                        "passthrough",
                                    >,
                                >;
                                clientInfo: ZodObject<
                                    extendShape<
                                        extendShape<
                                            { name: ...; title: ... },
                                            { version: ...; websiteUrl: ... },
                                        >,
                                        { icons: ZodOptional<(...)> },
                                    >,
                                    "passthrough",
                                    ZodTypeAny,
                                    objectOutputType<
                                        extendShape<extendShape<(...), (...)>, { icons: ... }>,
                                        ZodTypeAny,
                                        "passthrough",
                                    >,
                                    objectInputType<
                                        extendShape<extendShape<(...), (...)>, { icons: ... }>,
                                        ZodTypeAny,
                                        "passthrough",
                                    >,
                                >;
                                protocolVersion: ZodString;
                            },
                        >,
                        ZodTypeAny,
                        "passthrough",
                    >,
                    objectInputType<
                        extendShape<
                            {
                                _meta: ZodOptional<
                                    ZodObject<
                                        { progressToken: ZodOptional<(...)> },
                                        "passthrough",
                                        ZodTypeAny,
                                        objectOutputType<{ progressToken: ... }, ZodTypeAny, "passthrough">,
                                        objectInputType<{ progressToken: ... }, ZodTypeAny, "passthrough">,
                                    >,
                                >;
                            },
                            {
                                capabilities: ZodObject<
                                    {
                                        elicitation: ZodOptional<
                                            ZodObject<(...), (...), (...), (...), (...)>,
                                        >;
                                        experimental: ZodOptional<
                                            ZodObject<(...), (...), (...), (...), (...)>,
                                        >;
                                        roots: ZodOptional<ZodObject<(...), (...), (...), (...), (...)>>;
                                        sampling: ZodOptional<ZodObject<(...), (...), (...), (...), (...)>>;
                                    },
                                    "passthrough",
                                    ZodTypeAny,
                                    objectOutputType<
                                        {
                                            elicitation: ZodOptional<(...)>;
                                            experimental: ZodOptional<(...)>;
                                            roots: ZodOptional<(...)>;
                                            sampling: ZodOptional<(...)>;
                                        },
                                        ZodTypeAny,
                                        "passthrough",
                                    >,
                                    objectInputType<
                                        {
                                            elicitation: ZodOptional<(...)>;
                                            experimental: ZodOptional<(...)>;
                                            roots: ZodOptional<(...)>;
                                            sampling: ZodOptional<(...)>;
                                        },
                                        ZodTypeAny,
                                        "passthrough",
                                    >,
                                >;
                                clientInfo: ZodObject<
                                    extendShape<
                                        extendShape<
                                            { name: ...; title: ... },
                                            { version: ...; websiteUrl: ... },
                                        >,
                                        { icons: ZodOptional<(...)> },
                                    >,
                                    "passthrough",
                                    ZodTypeAny,
                                    objectOutputType<
                                        extendShape<extendShape<(...), (...)>, { icons: ... }>,
                                        ZodTypeAny,
                                        "passthrough",
                                    >,
                                    objectInputType<
                                        extendShape<extendShape<(...), (...)>, { icons: ... }>,
                                        ZodTypeAny,
                                        "passthrough",
                                    >,
                                >;
                                protocolVersion: ZodString;
                            },
                        >,
                        ZodTypeAny,
                        "passthrough",
                    >,
                >;
            },
        >,
        "strip",
        ZodTypeAny,
        {
            method: "initialize";
            params: {
                _meta?: objectOutputType<
                    { progressToken: ZodOptional<ZodUnion<[ZodString, ZodNumber]>> },
                    ZodTypeAny,
                    "passthrough",
                >;
                capabilities: {
                    elicitation?: objectOutputType<{}, ZodTypeAny, "passthrough">;
                    experimental?: objectOutputType<{}, ZodTypeAny, "passthrough">;
                    roots?: objectOutputType<
                        { listChanged: ZodOptional<ZodBoolean> },
                        ZodTypeAny,
                        "passthrough",
                    >;
                    sampling?: objectOutputType<{}, ZodTypeAny, "passthrough">;
                } & { [k: string]: unknown };
                clientInfo: {
                    icons?: objectOutputType<
                        {
                            mimeType: ZodOptional<(...)>;
                            sizes: ZodOptional<(...)>;
                            src: ZodString;
                        },
                        ZodTypeAny,
                        "passthrough",
                    >[];
                    name: string;
                    title?: string;
                    version: string;
                    websiteUrl?: string;
                } & { [k: string]: unknown };
                protocolVersion: string;
            } & { [k: string]: unknown };
        },
        {
            method: "initialize";
            params: {
                _meta?: objectInputType<
                    { progressToken: ZodOptional<ZodUnion<[ZodString, ZodNumber]>> },
                    ZodTypeAny,
                    "passthrough",
                >;
                capabilities: {
                    elicitation?: objectInputType<{}, ZodTypeAny, "passthrough">;
                    experimental?: objectInputType<{}, ZodTypeAny, "passthrough">;
                    roots?: objectInputType<
                        { listChanged: ZodOptional<ZodBoolean> },
                        ZodTypeAny,
                        "passthrough",
                    >;
                    sampling?: objectInputType<{}, ZodTypeAny, "passthrough">;
                } & { [k: string]: unknown };
                clientInfo: {
                    icons?: objectInputType<
                        {
                            mimeType: ZodOptional<(...)>;
                            sizes: ZodOptional<(...)>;
                            src: ZodString;
                        },
                        ZodTypeAny,
                        "passthrough",
                    >[];
                    name: string;
                    title?: string;
                    version: string;
                    websiteUrl?: string;
                } & { [k: string]: unknown };
                protocolVersion: string;
            } & { [k: string]: unknown };
        },
    > = ...

    This request is sent from the client to the server when it first connects, asking it to begin initialization.