Managing large Rust projects can be challenging due to Cargo's flexibility in structuring workspaces. For projects between ten thousand and one million lines of code, a flat layout is recommended over a nested one. This approach minimizes namespace inconsistencies, enhances project visibility, and simplifies the addition or splitting of crates. Additional tips include using a virtual manifest at the workspace root, avoiding the stripping of common prefixes, writing automation in Rust, using version '0.0.0' for internal crates, and maintaining a nested structure even for single-file crates.
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