Closes #935. A derive written in a function body did not compile. The tables went into a `mod` of their own, and a module cannot see the scope it was written in, so every reference to the user's type said `super::` — which from a module nested in a `fn` is the enclosing *module*, not the body. The function-local types were invisible, and the error named a generated identifier the author never wrote: error[E0425]: cannot find type `__Usage5LocalInner` in module `super` Every derive shape, not one of them: an enum with a wrapping variant and no bare variant anywhere failed identically. The tables now go in a `const _: () = { … }` with the impls inside it. A const block *is* the surrounding scope, so a name means what the author meant, and the whole `super::` question stops being asked. That deletes the path-rewriting pass — `in_module`/`path_in_module`, which shifted `self::` by one and `super::` by two and left `crate::` and `::` alone — along with the `inside_module` parameter that told `partial_defaults` which side of the wall it was emitting on, and the two spellings a subcommand type needed. Getting that rewriting wrong was never an error here; it was one in the adopter's crate, at a line they did not write. Sharing the scope has a cost the module was paying: the tables used to `use` argv's own types, and an import that was private to the module now sits beside the user's declarations. A subcommand enum called `Command` resolved to `::usage_argv::Command` — three of this repo's own fixtures broke exactly that way. So the tables name every type in full and import nothing. Both halves are tested and mutation-checked: re-importing `Command` fails the shadowing test with `usage_argv::Command<'_>: Subcommands is not satisfied`, and putting a `super::` back on a completer path fails to compile. Generated output is otherwise unchanged — the gate over mise's 211 commands and `gen-shadow` both agree byte for byte.

Commits

Commits on Aug 17, 2026

fix(derive): emit the tables beside the user's types, not in a module above them