Creates bash scripts with argument parsing, error handling, logging, and input validation following current standards. Use when creating new bash or shell scripts, .sh files, CLI tools, scripting automation, text processing workflows (grep/awk/sed pipelines), or building production-ready command-line utilities. Trigger phrases include 'write a bash script', 'create a shell script', 'generate a .sh file', 'bash command', 'scripting', or 'automate with bash'.