Create a test baseline for the project to be modernized. The baseline will be used for later verification of modernization tasks.
Install
npx skills add microsoft/github-copilot-modernization --skill create-test-baselinenpx skills add microsoft/github-copilot-modernization --skill create-test-baseline -a claude-code -gnpx skills add microsoft/github-copilot-modernization --skill create-test-baseline -a codex -ggemini skills install https://github.com/microsoft/github-copilot-modernization.git --path plugins/github-copilot-modernization/skills/create-test-baselinegh skill install microsoft/github-copilot-modernization create-test-baselinegit clone --depth 1 https://github.com/microsoft/github-copilot-modernization /tmp/microsoft__github-copilot-modernization
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/microsoft__github-copilot-modernization/plugins/github-copilot-modernization/skills/create-test-baseline ~/.claude/skills/create-test-baseline # Claude Code
cp -R /tmp/microsoft__github-copilot-modernization/plugins/github-copilot-modernization/skills/create-test-baseline ~/.agents/skills/create-test-baseline # Codex, Cursor, Gemini CLI, Copilot, OpenCode