Execution skill. Use when a formula's source metric dimensions differ from the target metric — apply BY, ADD, REMOVE, KEEP, SELECT, FILTER, EXCLUDE, TOPARENTLIST, or TOSUBSET. Also covers arrow-mapping syntax (BY ... ->) and tiered lookup patterns.
Install
npx skills add gopigment/ai-plugins --skill using-formula-modifiersnpx skills add gopigment/ai-plugins --skill using-formula-modifiers -a claude-code -gnpx skills add gopigment/ai-plugins --skill using-formula-modifiers -a codex -ggemini skills install https://github.com/gopigment/ai-plugins.git --path skills/using-formula-modifiersgh skill install gopigment/ai-plugins using-formula-modifiersgit clone --depth 1 https://github.com/gopigment/ai-plugins /tmp/gopigment__ai-plugins
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/gopigment__ai-plugins/skills/using-formula-modifiers ~/.claude/skills/using-formula-modifiers # Claude Code
cp -R /tmp/gopigment__ai-plugins/skills/using-formula-modifiers ~/.agents/skills/using-formula-modifiers # Codex, Cursor, Gemini CLI, Copilot, OpenCode