Agent Skills: bash-ops

Defensive Bash scripting for production automation, CI scripts, and agent-facing tools. Triggers on: bash, shell script, defensive bash, bash strict mode, set -euo pipefail, set -Eeuo pipefail, shellcheck, trap, IFS, cleanup trap, mktemp, getopts, argument parsing, exit codes, stream separation, stdout stderr, quoting, word splitting, pipefail, subshell, CI script, shell footgun, bats, shfmt, POSIX, portable shell.