Feature Flag Kill Switch During Outage: How Health Monitoring Guides Containment

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A feature flag kill switch must remain usable during an outage, but health monitoring cannot stop at process uptime when a healthtech pricing change may be charging the wrong amount. Treat every flag decision as an observable business event, then make containment depend on both service health and pricing invariants. Short answer: put the new rule behind a server-side kill switch, record every evaluation with a stable rollout and rule revision, and monitor outcome ratios alongside latency and errors. During an outage, freeze further exposure first, disable the rule through a pretested control p

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