During November 2024, Lucas Fontes enhanced the michaelficarra/wasm-tools repository by developing a new feature for the embed command, introducing a --only-custom flag that outputs solely the Custom section of a WebAssembly component. This addition addressed the need for more granular content extraction and control within CLI workflows. Lucas implemented the feature in Rust, leveraging his expertise in CLI development and WebAssembly, and reinforced its reliability by designing a dedicated test case to validate the new behavior. The work demonstrated a focused, test-driven approach, contributing a targeted improvement that aligns with the repository’s goals for precise content management and robust testing.