I searched for it for sometime in github with no luck. any implementation i find is either something like btcd, with more advanced non-minimalistic features or a miniature blockchain.
Have you come across
https://github.com/piotrnar/gocoin? The newest version have wallet, CLI and web UI, but the older version only have CLI and wallet where the wallet's code is separated from full node client. In addition, gocoin is created by only one person, so i expect he make things as simple as possible to make it easier to maintain.
But take note that gocoin simply load entire UTXO into RAM.