brush

brush (Bo(u)rn(e) RUsty SHell) is a modern bash- and POSIX- compatible shell written in Rust. Run your existing scripts and .bashrc unchanged -- with syntax highlighting and auto-suggestions built in.

Features:

bash-compatibility

• 50+ builtins: echo, declare, read, complete, trap, ulimit, ...
• Full expansions: brace, parameter, arithmetic, command/process substitution, globs, extglob, globstar
• Control flow: if/for/while/until/case, &&/||, subshells, pipelines, etc.
• Redirection: here docs, here strings, fd duplication, process substitution redirects
• Arrays & variables: indexed/associative arrays, dynamic variables, standard well-known variables, etc.
• Programmable completion: Works with bash-completion out of the box
• Job control: background jobs, suspend/resume, fg/bg/jobs
• Traps & options: DEBUG/ERR/EXIT traps work; signal traps and options in progress

User experience

• Syntax highlighting: Real-time as you type (reedline)
• Auto-suggestions: History-based hints as you type (reedline)
• Rich prompts: PS1/PROMPT_COMMAND, right prompts, starship compatible
• TOML config: ~/.config/brush/config.toml for persistent settings
• Extras: fzf/atuin support, zsh-style precmd/preexec hooks (experimental), VS Code terminal integration