Developed and released brush-shell 0.3.0 for the facebook/pyrefly repository, introducing a Bash and POSIX-compatible shell implemented in Rust. The work focused on cross-platform development, ensuring compatibility across Linux, macOS, and Windows by integrating core dependencies such as brush-core and brush-builtins. Adjustments to build-time configuration, including environment variable handling and buildscript flags, aligned the new shell with project conventions and improved maintainability. No major bug fixes were addressed during this period, as the primary effort centered on expanding scripting capabilities and automation through robust shell integration, leveraging Rust and shell scripting expertise for stable, multi-platform support.