* Consider using iterator chaining on `fs::read_dir` results, avoiding the deeply nested `if let Ok` pyramid of doom. * Decouple directory specification from the core logic; integrate command-line arguments using robust libraries like `clap`. * Enhance foundational error reporting using the standard `?` operator or explicit error mapping to provide contextual failure details. * Clean the main function by promptly removing all substantial commented-out input reading code, improving clarity significantly.
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