Shellcheck

Validate shell scripts (.sh, bash, sh, dash, ksh) for syntax errors, common bugs, quoting issues, and portability problems. Catches errors that would otherwise only surface at runtime.

What this skill does

1. Checks if shellcheck is available; guides installation if missing.
2. Detects project-specific .shellcheckrc or falls back to a sensible default config.
3. Validates shell scripts for syntax, quoting, security, portability, and best practice issues.
4. Reports errors with specific SC codes and concrete fixes.

Installation check