Mojo SDK v0.7, the first major release of 2024, introduces a range of new features across the core language, standard library, and developer tools. Key highlights include the introduction of a Mojo-native dictionary type, which provides a dynamic and mutable data structure for storing key-value data, particularly beneficial for Python data science developers. The release also adds new functions to access the host CPU's physical, logical, and performance core counts, enhancing the ability to write portable and parallelizable code. A prototype of a safe References type is introduced, offering a safer alternative to pointers by tracking "lifetime" values. The Mojo CLI and language server are updated with a new compiler option to enable debug assertions, useful for debugging, and Visual Studio Code now supports Go to References and Find All References within a single document. This release also includes improvements to closures, unroll, vectorize, and several bug fixes, with additional details available in the changelog.