Cargo Features

[dependencies]
transcendent = { version = "0.3.2", default-features = false, features = ["poseidon", "hermes", "athena"] }
default = hermes

The hermes feature is set by default whenever transcendent is added without default-features = false somewhere in the dependency tree.

zeus hades poseidon
hermes default
athena

transcendent has 4 features without comments.