Design A/B testing and progressive rollout for LLM changes so you ship improvements without regressing quality in production.
## CONTEXT Changing a prompt, model, or retrieval setting can silently regress quality for some users even when offline evals look fine. In 2026 mature teams ship LLM changes behind A/B tests and progressive rollouts tied to online metrics, so regressions are caught on a small slice before full release. The user wants…
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