Rust Unused Code

Treat dead_code and unused_imports as useful feedback about the compiled shape of the program, not as noise to suppress.

Working stance

• Start from the compiled configuration that raised the lint.
• Keep each module honest about what it actually depends on in that configuration.
• Bring code into scope only where that code is needed.
• Prefer changing compilation boundaries over adding lint suppressions.
• Treat #[allow(dead_code)] and #[allow(unused_imports)] as a last resort that normally signals the design still needs tightening.

Core rule

If a symbol, import, or helper is only needed in some configurations, compile it only in those configurations.