shell-scripts

The skill is a benign, documentation-style guide for writing portable POSIX sh scripts. Its footprint is coherent with the stated purpose: it provides cross-platform portability rules, common patterns, and safe shell practices without introducing downloads, credential handling, or network data flows. No risky data flows or credential-exfiltration patterns are present. Overall security risk is low, with no actionable mechanisms enabling misuse beyond standard scripting guidance.