IGPAPI
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    Variable PostOpenedFromLinkInputSchemaConst

    PostOpenedFromLinkInputSchema: Struct<
        {
            carouselIndex: optionalKey<Number>;
            feedPosition: optionalKey<Union<readonly [Number, String]>>;
            loggingInfoToken: optionalKey<String>;
            mediaId: String;
        },
    > = ...

    What a post is opened with: the media it shows and the feed context the answer gave for it. The feed's media carries its logging token (logging_info_token) and the page gives the item's position, so the post's like and note send what the recording sends without the caller supplying it; a post opened from a link passes none of them.