currently this is just a wrapper around post id, but should be seen as opaque from the client's
perspective. stringified since we might want to use arbitrary info later, with a P prepended to
prevent ossification (api users love to make assumptions (e.g. parse stuff that looks like
numbers as numbers) about apis that aren't part of the spec
currently this is just a wrapper around post id, but should be seen as opaque from the client's perspective. stringified since we might want to use arbitrary info later, with a P prepended to prevent ossification (api users love to make assumptions (e.g. parse stuff that looks like numbers as numbers) about apis that aren't part of the spec