Extracts the transferable principle from a specific historical case — separating the contingent surface details from the underlying rule that applies across contexts. TRIGGERS: 'what's the lesson', 'extract the lesson', 'what should we learn from this', 'generalise from this case', 'apply this to our situation'.
Install
npx skills add human-avatar/skills-for-humanity --skill s4h-historical-lesson-extractionnpx skills add human-avatar/skills-for-humanity --skill s4h-historical-lesson-extraction -a claude-code -gnpx skills add human-avatar/skills-for-humanity --skill s4h-historical-lesson-extraction -a codex -ggemini skills install https://github.com/human-avatar/skills-for-humanity.git --path skills/s4h-historical-lesson-extractiongh skill install human-avatar/skills-for-humanity s4h-historical-lesson-extractiongit clone --depth 1 https://github.com/human-avatar/skills-for-humanity /tmp/human-avatar__skills-for-humanity
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/human-avatar__skills-for-humanity/skills/s4h-historical-lesson-extraction ~/.claude/skills/s4h-historical-lesson-extraction # Claude Code
cp -R /tmp/human-avatar__skills-for-humanity/skills/s4h-historical-lesson-extraction ~/.agents/skills/s4h-historical-lesson-extraction # Codex, Cursor, Gemini CLI, Copilot, OpenCode