Stremio supports the following meta links as of Dec 2019:
stremio:///search?search=${query} - opens the Search page with the set ${query}
stremio:///discover/${transportUrl}/${type}/${catalogId}?${extra} - opens the Discover page for the addon that has ${transportUrl} (URL to an addon’s Manifest), with the Catalog which has the id ${catalogId} and the type ${type}, the ?${extra} is optional and refers to Catalog Extra Parameters that should be passed as a Query String
stremio:///detail/${type}/${id} - opens the Detail page for the Meta Object with the id ${id} and the type ${type}
stremio:///detail/${type}/${id}/${videoId} - opens the Detail page with Streams open for the Video with the id ${videoId} for the Meta Object with the id ${id} and the type ${type}
If you think Stremio should add another meta link, feel free to open an issue on this repository.