Following the convention of other products, the .tar and .zip packages should include a parent directory with the name, architecture and version of the software. In other words, the structure of today:
THIRD_PARTY_NOTICES LICENSE-mongocryptd bin bin/mongosh bin/mongocryptd-mongosh LICENSE-mongosh README
should become:
mongosh-darwin-x64-0.15.0/THIRD_PARTY_NOTICES mongosh-darwin-x64-0.15.0/LICENSE-mongocryptd mongosh-darwin-x64-0.15.0/bin mongosh-darwin-x64-0.15.0/bin/mongosh mongosh-darwin-x64-0.15.0/bin/mongocryptd-mongosh mongosh-darwin-x64-0.15.0/LICENSE-mongosh mongosh-darwin-x64-0.15.0/README
The relative order of architecture and version in the directory name seems rather insignificant to me, although our other products seem to suggest to have the architecture first and then the version number.