Systematically review workflow traces to identify failure modes before building evaluators. Use when starting an eval project, after significant pipeline changes, or when production quality drops.
Install
npx skills add growthxai/output --skill output-eval-error-analysisnpx skills add growthxai/output --skill output-eval-error-analysis -a claude-code -gnpx skills add growthxai/output --skill output-eval-error-analysis -a codex -ggemini skills install https://github.com/growthxai/output.git --path coding_assistants/claude/plugins/outputai/skills/output-eval-error-analysisgh skill install growthxai/output output-eval-error-analysisgit clone --depth 1 https://github.com/growthxai/output /tmp/growthxai__output
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/growthxai__output/coding_assistants/claude/plugins/outputai/skills/output-eval-error-analysis ~/.claude/skills/output-eval-error-analysis # Claude Code
cp -R /tmp/growthxai__output/coding_assistants/claude/plugins/outputai/skills/output-eval-error-analysis ~/.agents/skills/output-eval-error-analysis # Codex, Cursor, Gemini CLI, Copilot, OpenCode