Currently the manifestList and oci.index types are supported in the pull flow (as far as the layers/blobs are processed when an index/list is walked), but there are no platform selectors such that errors are emitted when attempting to run or pull these images after the resources are fetched.

@stevvooe and I will work on design and implementation of these platform selectors such that there is complete support for multi-platform image types via the OCI index type and the Docker distribution v2.2 manifest list type.