Build feature work with high overbuilding risk. Use for new behavior, product slices, or integrations where repository reuse, strict scope, and an explicit stop condition matter.
Install
npx skills add JuliusBrussee/caveman --skill lean-buildnpx skills add JuliusBrussee/caveman --skill lean-build -a claude-code -gnpx skills add JuliusBrussee/caveman --skill lean-build -a codex -ggemini skills install https://github.com/JuliusBrussee/caveman.git --path skills/lean-buildgh skill install JuliusBrussee/caveman lean-buildgit clone --depth 1 https://github.com/JuliusBrussee/caveman /tmp/JuliusBrussee__caveman
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/JuliusBrussee__caveman/skills/lean-build ~/.claude/skills/lean-build # Claude Code
cp -R /tmp/JuliusBrussee__caveman/skills/lean-build ~/.agents/skills/lean-build # Codex, Cursor, Gemini CLI, Copilot, OpenCode