bash

npx skills add sickn33/agentic-awesome-skills --skill bash --agent claude-code

Same command for any agent — swap --agent for codex, cursor, copilot.

# Bash / Shell: Idiomatic Efficiency Reference ## When to Use - Use this skill when the task matches this description: Language-specific super-code guidelines for bash. ## Table of Contents 1. [Quoting & Word Splitting](#quoting) 2. [Conditionals & Tests](#conditionals) 3. [Loops & Iteration](#loops) 4. [Pipes & Process Substitution](#pipes) 5. [Functions & Return Values](#functions) 6. [Error Handling](#errors) 7. [Anti-patterns specific to Bash](#antipatterns) --- ## 1. Quoting & Word Splitting {#quoting} ```bash # ❌ Unquoted variable (word splitting + globbing) for f in $files; do rm $f; done # ✅ for f in "${files[@]}"; do rm -- "$f"; done ``` ```bash # ❌ Unquoted command substitution path=$(find . -name config) cat $path # breaks on spaces # ✅ path="$(find . -name config)" cat "$path" ``` ```bash # ❌ Using backticks for command substitution result=`echo hello` # ✅ — $() nests cleanly result=$(echo hello) ``` ```bash # ❌ String comparison without quotes if [ $var = "hello" ]; then # breaks if var is empty or has spaces # ✅ if [[ "$var" = "hello" ]]; then ``` **Rule: double-quote every `$variable` and `$(command)` unless you specifically need splitting.** --- ## 2. Conditionals &

for f in $files; do rm $f; done
for f in "${files[@]}"; do rm -- "$f"; done
cat $path  # breaks on spaces
cat "$path"
if [ $var = "hello" ]; then  # breaks if var is empty or has spaces
if [[ "$var" = "hello" ]]; then
if [ -f "$file" -a -r "$file" ]; then
if [[ -f "$file" && -r "$file" ]]; then
grep -q pattern file
if [ $? -eq 0 ]; then echo "found"; fi