v1.0.0 is a major step forward from the 0.3.x series. MARIO has been substantially reorganized around a clearer architecture and a more explicit public API centered on Database, with legacy logic moved out of core/tools into dedicated api, compute, ops, parsers, views, storage, and internal modules. The release also expands compute capabilities with stronger SUT support, product-based technology assumptions, new trade-analysis APIs, built-in GHG calculation profiles, exploded multiplier/footprint accessors, and a new unified Database.plot(...) workflow. Compared with 0.3.x, v1.0.0 also significantly broadens data handling. Parsing and export are now unified across Excel, TXT, and Parquet; richer matrix layouts are supported; direct parser coverage has been expanded across major datasets; and downloaders have been cleaned up into a clearer interface. Structural operations were upgraded as well, including a refactored add_sectors workflow, better aggregation behavior, support for VY, and improved handling of SUT assumptions and transformations. Finally, the release comes with a much larger automated test suite, stronger regression coverage, pandas 3 compatibility fixes, and a broad documentation refresh.