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The document discusses why documentation is needed even for those who prefer working software over documentation. It argues that documentation provides context for new team members and helps demonstrate that the work being done is understood. The document recommends creating lightweight documentation like diagrams, maps, and wikis to depict the major components and flows of the software system at a high level, as well as more detailed documentation for complex or infrequently used areas. It advises selecting a core set of documentation to maintain and focus on documenting the why rather than just the what.Read less