Prove existing work meets acceptance conditions without expanding scope. Use for validation-only tasks, completion checks, focused gate runs, and last-mile proof.
Install
npx skills add JuliusBrussee/caveman --skill verify-and-stopnpx skills add JuliusBrussee/caveman --skill verify-and-stop -a claude-code -gnpx skills add JuliusBrussee/caveman --skill verify-and-stop -a codex -ggemini skills install https://github.com/JuliusBrussee/caveman.git --path skills/verify-and-stopgh skill install JuliusBrussee/caveman verify-and-stopgit clone --depth 1 https://github.com/JuliusBrussee/caveman /tmp/JuliusBrussee__caveman
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/JuliusBrussee__caveman/skills/verify-and-stop ~/.claude/skills/verify-and-stop # Claude Code
cp -R /tmp/JuliusBrussee__caveman/skills/verify-and-stop ~/.agents/skills/verify-and-stop # Codex, Cursor, Gemini CLI, Copilot, OpenCode