Validation✓ Mathematical
◆ The PatternValidating new models in production without serving their predictions
In shadow mode, the new model scores every request alongside the current champion, but only the champion's prediction is served. You collect real production data to compare — without risking user experience. When the challenger wins on key metrics, you promote it.
// Interactive — champion vs challenger comparison
Pattern bridge: Shadow scoring is walk-forward validation running live. In markets, paper trading serves the same purpose — test with real data without real consequences.