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behavioral-mutation-analyzer

80 / 100 · Low risk

Fine to try. Some of what it can do is expected: a coding skill usually runs build and test commands.

By ArabelaTso/Skills-4-SE (GitHub) · coding · 260 stars · scanned at commit 4f38503

Analyzes surviving mutants from mutation testing to identify why tests failed to detect them. Takes repository code, test suite, and mutation testing results as input. Identifies root causes including insufficient coverage, equivalent mutants, weak assertions, and missed edge cases. Automatically generates actionable test improvements and new test cases. Use when analyzing mutation testing results, improving test suite effectiveness, investigating low mutation scores, generating tests to kill s…

Works with any agent that supports SKILL.md skills.

What this skill can do

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'behavioral-mutation-analyzer' ] || [ -L ~/.agents/skills/'behavioral-mutation-analyzer' ]; then echo 'A skill folder named behavioral-mutation-analyzer already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/ArabelaTso/Skills-4-SE' "$d" && git -C "$d" checkout --quiet '4f38503747e0617504bce5329283ef837d375c09' -- 'skills/behavioral-mutation-analyzer' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/behavioral-mutation-analyzer' ~/.agents/skills/'behavioral-mutation-analyzer' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'behavioral-mutation-analyzer' ~/.claude/skills/'behavioral-mutation-analyzer' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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