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How feature flags grow from safe release controls into hidden complexity, and how lifecycle rules, ownership, tests, and cleanup keep them contained.
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Tests can pass while production still breaks when the suite proves the intended path but misses retries, concurrency, dirty data, and rollout state.- Published on
Why production caches return stale or contradictory data: cache-aside races, invalidation gaps, TTL drift, local cache divergence, and safer rollouts.