This is broken

Running this gives the following issue:

thread 'main' panicked at 'Found positional argument which is not required with a lower index than a required positional argument: "files" index 1', src/app/parser.rs:636:21
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Start by inspecting src/app/parser.rs around line 636 and the positional-argument parsing path that emits this panic. Identify the command invocation that triggers the reported error; done means that argument arrangement is handled without a panic, with a regression test if the repository provides a suitable test location.

Written by the indexing model from the issue text.