← All skills

legacy-code-testing

100 / 100 · Low risk

Fine to try.

By timwukp/agent-skills-best-practice (GitHub) · coding · 13 stars · scanned at commit 0a67102

Adds tests to legacy code that has none, safely: characterization tests that pin current behavior (including bugs) before any refactoring, seam identification for breaking untestable dependencies, and a risk-ranked coverage strategy. Use for untested or inherited codebases. Triggers on: "add tests to legacy code", "this code has no tests", "characterization tests", "make this testable", "safe to refactor?", "pin down current behavior", "test this old module before we change it".

Works with any agent that supports SKILL.md skills.

What this skill can do

We found nothing in the files we read that matches our rules. That does not prove the skill is safe: see the limits of static scanning.

Install

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

if [ -e ~/.agents/skills/'legacy-code-testing' ] || [ -L ~/.agents/skills/'legacy-code-testing' ]; then echo 'A skill folder named legacy-code-testing already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/timwukp/agent-skills-best-practice' "$d" && git -C "$d" checkout --quiet '0a67102a22e6958154baf632b9ac4eeec7f1fa9c' -- 'skills/skills/legacy-code-testing' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/skills/legacy-code-testing' ~/.agents/skills/'legacy-code-testing' && 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/'legacy-code-testing' ~/.claude/skills/'legacy-code-testing' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

Badge for your README

The badge for timwukp/agent-skills-best-practice shows the score of its lowest-scoring skill.

[![SkillTrust](https://zalavijaysinh.github.io/skilltrust/badges/timwukp/agent-skills-best-practice.svg)](https://zalavijaysinh.github.io/skilltrust/repos/timwukp/agent-skills-best-practice/)

Score history