Something that speaks to the language's strengths and the ecosystems' interests. The problem has to feel more than a simple exercise. Functional -- writing an

Something that speaks to the language's strengths and the ecosystems' interests. The problem has to feel more than a simple exercise. Functional -- writing an interpreter for a toy language, Scripting -- Sudoku/Wordle solver with UI Systems language with low-level hardware access -- OpenCV integration, driving I/O pins, web server. For all of them, I also test access to native C/C++ libraries.