Like-for-like before a measured number is reported or credited to a change. Use before saying a change moved a score, a count, a before/after delta, a benchmark time or speedup, a Lighthouse or Core Web Vitals result, an eval score, or an error, conversion or traffic rate. For whether the tests and gates passed, use `regression-proof`.
Install
npx skills add ehnruiz/claude-skills --skill explain-the-numbernpx skills add ehnruiz/claude-skills --skill explain-the-number -a claude-code -gnpx skills add ehnruiz/claude-skills --skill explain-the-number -a codex -ggemini skills install https://github.com/ehnruiz/claude-skills.git --path skills/explain-the-numbergh skill install ehnruiz/claude-skills explain-the-numbergit clone --depth 1 https://github.com/ehnruiz/claude-skills /tmp/ehnruiz__claude-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/ehnruiz__claude-skills/skills/explain-the-number ~/.claude/skills/explain-the-number # Claude Code
cp -R /tmp/ehnruiz__claude-skills/skills/explain-the-number ~/.agents/skills/explain-the-number # Codex, Cursor, Gemini CLI, Copilot, OpenCode