So at the moment, I'm making use of Indiekit and wanted to try out Postr as it offers native syndication as well as automatic webmentions.

The URL on my static site is modelled like so for notes: /notes/:year/:month/:day/:slug

When I add other post types, I intend to change the URL scheme to something along the lines of /micro/:postType/:year/:month/:day/:slug.

For greater configurability, something like the following would be more preferable:

permalinkPattern: {
  note: '/micro/notes/:year/:month/:day/:slug',
  like: '/micro/likes/:year/:month/:day/:slug'
}

Some may prefer using notes while some may prefer using note for example. This takes care of that by letting them specify it.

Is it already possible to specify the post type to be a part of the permalink? If not, would you consider adding this feature at some point, or alternatively, accept a PR? I don't know if I'll get around to a PR at all, but would be lovely to know what your thoughts are.