First principles analysis. USE WHEN first principles, fundamental, root cause, decompose. SkillSearch('firstprinciples') for docs.
Install
npx skills add danielmiessler/LifeOS --skill firstprinciplesnpx skills add danielmiessler/LifeOS --skill firstprinciples -a claude-code -gnpx skills add danielmiessler/LifeOS --skill firstprinciples -a codex -ggemini skills install https://github.com/danielmiessler/LifeOS.git --path Releases/v2.5/.claude/skills/FirstPrinciplesgh skill install danielmiessler/LifeOS firstprinciplesgit clone --depth 1 https://github.com/danielmiessler/LifeOS /tmp/danielmiessler__LifeOS
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/danielmiessler__LifeOS/Releases/v2.5/.claude/skills/FirstPrinciples ~/.claude/skills/firstprinciples # Claude Code
cp -R /tmp/danielmiessler__LifeOS/Releases/v2.5/.claude/skills/FirstPrinciples ~/.agents/skills/firstprinciples # Codex, Cursor, Gemini CLI, Copilot, OpenCode