Cargo Features

wasmer-interface-types = { version = "0.17.0", default-features = false, features = ["serde"] }
default = serde

The serde feature is set by default whenever wasmer-interface-types is added without default-features = false somewhere in the dependency tree.

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

serde default

Enables serde

serde is useful only to simplify the users' life. It is not required by WIT itself, is is used to cross the boundary between the host and WIT more easily, but it is not used inside Wasm.