language-bash

What problem does it solve?

This Skill prevents common Bash production failures by guiding you to write strict-mode, correctly quoted, idempotent scripts that fail safely and behave predictably.

Core Features & Use Cases

• Strict-mode correctness: applies robust defaults like set -euo pipefail, safe IFS, and predictable pipeline failures to reduce silent errors.
• Quoting and word-splitting discipline: enforces safe parameter expansion practices and array iteration patterns to avoid broken filenames and injection-like bugs.
• Operational safety patterns: covers trap-based cleanup, signal handling, idempotency via sentinels/atomic rewrites, and heredocs (literal vs interpolated) for reliable automation.
• Portability guardrails: distinguishes Bash-only features from POSIX sh and points to shellcheck-compatible practices for enforceable contracts.
• Use Case: When maintaining a deployment or migration script that may be re-run, use this Skill to make it resilient to partial execution, handle interrupts cleanly, and avoid breaking on edge-case inputs like spaces.

Quick Start

Ask the skill to show how to restructure your Bash script with strict mode, correct quoting/arrays, and an idempotency sentinel while using trap cleanup for safe re-runs.