An open-source developer shares their experience building a command-line application for searching and copying emojis, emphasizing its speed and efficiency compared to graphical interfaces. The app allows multiple matching emojis to be copied to the clipboard simultaneously and includes an interactive mode for selecting specific emojis when multiple matches are found. Developed using Python, the app leverages the emoji and pyperclip libraries, with poetry used for dependency management and project organization. The developer highlights the testing process, utilizing pytest and mocking input, and details the publication process to PyPI. They end with an invitation for contributions to the project and encourage engagement on GitHub.