CompilerConfiguration.#args and Sys.args() are the same.

Seems to me that the args in CompilerConfiguration should be the ones *before* haxelib transforms them, given that the ones after are already available.

Start by tracing how CompilerConfiguration.#args and Sys.args() are populated, including where haxelib transforms arguments. Confirm which arguments are available before and after that transformation, then define completion as exposing the two distinct argument sets without changing unrelated compiler behavior.

Written by the indexing model from the issue text.