More internal comments

src/lib.rs

@@ -179,14 +179,21 @@
 #[cfg(feature = "std")]
 extern crate std;
 
+// These modules are all auto-generated by `./ci/regenerate.sh`
 mod bindings;
 #[allow(unused_imports)]
 mod command;
 #[allow(unused_imports)]
 mod proxy;
 
+// generated bindings start with the package namespace, which in this case is
+// `wasi`, but the crate is already called wasi, so lift everything up one level
+// to the root of this crate.
 pub use bindings::wasi::*;
 
+// Expand the `cli` and `http` modules with `export!` macros for the
+// command/proxy worlds, but also retain all the contents defined in the
+// `bindings` module as well.
 pub mod cli {
     pub use super::bindings::wasi::cli::*;