Running experiments out of the data warehouse instead of via dedicated experiment platforms. SQL-based assignment, exposure logging discipline, metric definitions in dbt models, statistical analysis in SQL or Python, variance reduction with CUPED, sequential testing, and the operational tradeoffs vs platforms like Statsig and Optimizely.
Install
npx skills add rampstackco/claude-skills --skill data-warehouse-experimentationnpx skills add rampstackco/claude-skills --skill data-warehouse-experimentation -a claude-code -gnpx skills add rampstackco/claude-skills --skill data-warehouse-experimentation -a codex -ggemini skills install https://github.com/rampstackco/claude-skills.git --path skills/data-warehouse-experimentationgh skill install rampstackco/claude-skills data-warehouse-experimentationgit clone --depth 1 https://github.com/rampstackco/claude-skills /tmp/rampstackco__claude-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/rampstackco__claude-skills/skills/data-warehouse-experimentation ~/.claude/skills/data-warehouse-experimentation # Claude Code
cp -R /tmp/rampstackco__claude-skills/skills/data-warehouse-experimentation ~/.agents/skills/data-warehouse-experimentation # Codex, Cursor, Gemini CLI, Copilot, OpenCode