Four-phase debugging methodology with root cause analysis. Use when investigating bugs, fixing test failures, or troubleshooting unexpected behavior. Emphasizes NO FIXES WITHOUT ROOT CAUSE FIRST.
Install
npx skills add ChrisWiles/claude-code-showcase --skill systematic-debuggingnpx skills add ChrisWiles/claude-code-showcase --skill systematic-debugging -a claude-code -gnpx skills add ChrisWiles/claude-code-showcase --skill systematic-debugging -a codex -ggemini skills install https://github.com/ChrisWiles/claude-code-showcase.git --path .claude/skills/systematic-debugginggh skill install ChrisWiles/claude-code-showcase systematic-debugginggit clone --depth 1 https://github.com/ChrisWiles/claude-code-showcase /tmp/ChrisWiles__claude-code-showcase
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/ChrisWiles__claude-code-showcase/.claude/skills/systematic-debugging ~/.claude/skills/systematic-debugging # Claude Code
cp -R /tmp/ChrisWiles__claude-code-showcase/.claude/skills/systematic-debugging ~/.agents/skills/systematic-debugging # Codex, Cursor, Gemini CLI, Copilot, OpenCode