Mutation Testing: The Missing Safety Net for...

92% code coverage. No SonarQube criticals. All green. And an AI-generated deduplication bug made it to production because not a single test had challenged the logic. Code coverage tells you what ran. Mutation testing tells you what your tests would actually catch if the code were wrong. And in the AI world, that's the only thing that matters. Let us check an analogy here > Walking through a building, coverage means we visited all rooms. Mutation testing means we would notice if there were a miss