I commented on one of your commits but it seems the messages has disappeared.

So I will write it again.

I wanted to know why you want to keep the code from the "revert some cache checks" commit (5fa6946).

In concrete implementation of the DownloadCache does already check if an item is cached or not, and is doing the exact same check with an early return:

// From DiskDownloadCache.cs:

        public bool TryGetDownloadCacheItem(string uri, out string filePath)
        {
            ValidateCacheDirectory();
            bool exists;

            if (uri.Contains(Rest.FileUriPrefix))
            {
                filePath = uri;
                return File.Exists(uri.Replace(Rest.FileUriPrefix, string.Empty));
            }
       }

I would argue that it should be up to the DownloadCache to decide if an item is cached or not.

In concrete implementation of the DownloadCache does already check if an item is cached or not, and is doing the exact same check with an early return

It was a breaking change and the early check actually was needed to prevent unintended behavior changes to existing packages.

Oh, got you. Good that you spotted that then!