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- firmware-loader: wrap libc::fcntl in unsafe (E0133); .map(|_|()) so notify_scheme_ready returns Result<(),String> not Result<usize,_> (E0308). - redbear-greeter: log::debug! -> eprintln! (the crate isn't a dep; matches the surrounding eprintln! style) (E0433). Found by --check-sweep on redbear-full. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>