Shell Expert

Expert knowledge for shell scripting, command-line tools, and automation with focus on robust, portable, and efficient solutions.

When to Use This Skill

Use this skill when...	Use justfile-expert instead when...
Authoring portable bash, zsh, or POSIX shell scripts	Wrapping commands as named recipes for a project task runner
Composing pipelines and one-off automation logic	Standardising entry points across a team or repo
Hardening scripts with `set -euo pipefail`, traps, and quoting	Defining cross-platform commands without writing shell glue

Use this skill when...	Use jq-json-processing instead when...
Glue logic that wires together CLI tools	The work is purely transforming JSON input
Writing reusable functions, argument parsing, or signal handling	A single jq expression can replace a chain of shell commands